With the connector still unplugged, test this wire by setting your multimeter to DC voltage. Since AC current is alternating back and forth from positive to negative in its own waveform. could be that, theoretically. BIKE WON'T HOLD 13/14 VOLTS. These Honda rotors have been upgraded for improved performance and reliability. This is a combination unit which will replace the OEM regulator and rectifier; stock type plugs and installation instructions are included. The fuse actually bridges two screws on the solenoid. It may not display this or other websites correctly. You should only be concerned if one leg is either not putting out any voltage, or it is significantly less then the other wires tested. Sbartram91; Jun 10, 2020; Electrical; Replies 14 Views 4K. Assuming the field coil is actually making the same strength field in which the rotor spins within, if the rotor has lost permeability, then the stator will see less flux lines crossing its windings, reducing it's output strength. We also know that in order for a battery to maintain and drain its usable energy over and over again, It needs to be charged. I started having issues with it last year and since then I have replaced the voltage rectifier, the rotor, the stator generator, the carbon brushes and The battery. Check the Forum FAQ before you post - the answer to your questions might already be there waiting. Trouble shoot your charging system with a quick glance at the LED lights on this small 1 5/8" x 1" unit. check the field coil and stator coils resistance first. Now reverse your leads and retest in the same manner as before. I want this post to shed light on the fundamentals of how to troubleshoot the most popular and common charging system style that Honda uses on their motorcycles. Thanks so much for this anyone have the parts book? Honda CB750A Hondamatic. OK, new stator is in and no difference. Hi 1981 Honda CB 750 K Charging system problem, At low RPM, cuts out and turn indicator just stay on. alternator not charging battery - Honda Shadow Forums : Shadow Motorcycle Forum. Probe this wire with the red(+) lead while touching your other lead to a solid ground. R/R is only here to capture & regulate the alternator output. This more than likely means that there is a break in the windings. Either way, testing is pretty much the same. Your right about the holder. 1971 CB750K1 (newest bike), 1996 Royal Enfield 500 Bullet (therapy bike), 1981 Yamaha XV920RH, 2006 Kawasaki Concours (retirement bike), 1975 Yamaha RD350 (race bike), 1989 Honda VTR250 Interceptor (race bike), 1986 Kawasaki EX250 Ninja (race bike in progress), 1985 Honda Elite CH250, 1973 Yamaha GT1 80cc, 1974 Yamaha DT360 project bike. They can also be found in the center of the alternating system like on the older CB750s Now, its still drops the charge after I drive it for about a week. I use one like this that gives you a Digital voltage read out. It will instantly start draining the battery. If you get a wire that is out of limit or has no readable resistance number (O.L). To little charge will gradually kill your battery. For a better experience, please enable JavaScript in your browser before proceeding. Any insights would be greatly appreciated. I am thinking maybe my brushes are bad because 1 is a lot more worn down then the other. The rectifier needs to be unplugged with no voltage running through it. JavaScript is disabled. Can someone please help me, I sure would appreciate . Dimensions 68mm Length, 94mm Width, 26mm Height, Hole Distance 80.0mm Center to Center. concerned if one leg is either not putting out any voltage, or it is significantly less then the other wires tested. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. It may show 13.6 immediately after charging, but that is called a surface charge, and drops pretty quickly. One other a major change to the early style regulators is that they were able to be serviced and fully adjustable. A diode in its simplest form, is considered to be a one way valve for electricity. Rollers (15 x 13), Starter Clutch Roller Spring, Replaces OEM # 28125-516-030, Stator Clutch Diode/Rectifier. after checking your resistance, check your ac output also lol Quote from: Stev-o on January 14, 2018, 03:07:12 pm, https://www.youtube.com/watch?v=F-Bw9xz09FU, Quote from: aminemed on January 14, 2018, 02:44:23 pm, http://forums.sohc4.net/index.php?topic=126401.0, http://forums.sohc4.net/index.php?topic=132935.0, https://www.cmsnl.com/classic-honda-fansite/honda_wiring_diagrams/CB750(K3-K7).jpg. Regulates AC output voltage and rectifies charging current. Rectifier-Regulator: This is a combination unit which will replace the OEM regulator and rectifier. 0 Members and 1 Guest are viewing this topic. Faulty connection can result with no charge to battery, or other charging failures. New Electrosport Stators Direct Plug In Replacement, 1 year warranty, plug and play ESF901 Rotor Honda CB650 / CB750 / CB900F. With it connected I was getting 10vac @ 5000 rpm between the yellows. In which case the stator has begun to break down or is bad. Did you end up resolving this? I've had it for 2 years, and for about 1.5 of those years, I had no issues. If you get a resistance reading through both ways on the diode. Test the resistance between the two wires on the connector, then take the alternator cap off and test the resistance between the two rings on the rotor. You will receive a reminder when the product becomes available Use that. Replacing Light Bulbs. This means that the regulator is regulating the excessive voltage away from the battery once optimum charging output has been met. Thank you for your response Dan. Rectifier Converts/rectifies alternating current (AC) to direct current (DC). Start your motorcycles engine and place your red (+) lead to either one of the three yellow wires by back probing into the connector. HONDA cb750 charging system explained - YouTube AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new featuresNFL Sunday Ticket 2023. Dynatek Charge Monitor. Batteries can not store AC voltage. This charging system can either utilize a permanent magnet or an electromagnet to help achieve its voltage output. First, I'm not receiving any compensation. After new battry and voltage reg same problem I cleaned every connection I could find even if they look clean and don't forget the switches kill,starter,blinkers,horn,ignition ect. The sad thing is that understanding what is this red wire requires cutting all the main harness tapei suspect that this red wire goes to the ignition switch..i should.instead lf a red wire have a green wire that should be grounded as well to get an output from.the alternator if i'm right. Keep in mind that this process is happening faster then you can see. Most common stator and flywheel combination . Its in near mint condition, only has about 27k miles on it. Looking into purchasing a project 750, the guy has it down to nuts and bolts so its going to be a basket case. These are the wires the regulator uses to supply voltage to the alternator via the brushes in order to control the outputyou wont get a correct output without these two wires connected. Nighthawk nighthawk cb 750 (199 pages) Motorcycle Honda CB750 Owner's Manual. Plenty videos on u tube. Logo merchandise is available at the SOHC/4 Shop. Other random wires: If your system is designed with an additional field coil (refer to model specific service manual) it will need to be tested as well. *Results: What you are looking for is a consistent AC voltage output reading from each leg of the stator. I will go pull the cover now and test the contact rings directly now. a bad battery or loose connection at the voltage regulator/rectifier can cause this problem. Once it was heated up and running, it ran grrrreat. For a better experience, please enable JavaScript in your browser before proceeding. The stator needs to be replaced. If you discover that you have and open (no numeric value) or a excessively high reading. TESTED ALTERNATOR SEEMS TO BE WORKING Answered in 12 minutes by: Talk to Tony at Oregonmotorcycleparts.com. It is over charging and buring out all bulbs. Battery Stores regulated DC current. Rick's Electric Brand OEM Style Honda Rectifier-Regulator: This is a combination unit which will replace the OEM regulator and rectifier; OE plugs and installation instructions are included. May require a custom mounting job. Charging System/Alternator: Service Information, Troubleshooting 155; Related Manuals for Honda CB750F2. I know its an old post just had to say thank you. Cycle Forums: Motorcycle and Sportbikes Forum. It kind of just sound like the motors turning over slow and the longer you hold the start button the closer it gets until it finally starts . Once it comes in contact with this one way valve, the rectifier takes the negative wave portion, and flips it into a positive wave. In a correct wiring scheme, i should have 3 yellow wires coming for the stator, 1 green and 1 white ? (318 pages) Motorcycle Honda CB750F2 Owner's Manual. Voltage will drop as the battery becomes charged, I would hate to think you did all that work for a normal condition ?? i doused pretty much the whole bike in contact cleaner to no avail. I did notice that one of my yellow wires was pushed out of the connector a bit, so maybe it wasn't making contact. The Charge Monitor allows easy determination of the operational state of the charging system with a quick glance at the indicator LED's. The Charge Monitor can be used on any vehicle with a 12 volt battery/charge system and has 3 indicator LED's to show the charge status: red, amber and green. Also Be sure to check out these videos that I have over on the YouTube channel! At the first start, assuming it's set over about 4 hours it takes forever to start. Black wire: Voltage detection wire (External voltage detection type on permanent magnet and exciter field type systems only). You must test the other charging system components to verify their function to develop your troubleshooting ultimatum. CB750c 1981 weak charge issue. Place one lead on the wire and the other lead to a solid ground. Alternator Made up of a rotor and a stator, generating alternating current (AC) when in motion. Designed with a lower voltage set point to work with lithium ion batteries only. I have measured voltage at battery POS and NEG. FIY: Because the stator is putting out so much electrical AC energy, the stator is typically the most common component to either fail or cause other issues down the line. OEM # 31700-333-008 / 31700-323-015. Staff member. http://www.bikeexif.com/honda-cb450-restoration. Rick's Electric Brand Lithium Ion Battery Compatible Rectifier-Regulator. yeah i just did that too. Welcome to SOHC/4 Forum Archives. It also appears the previous owner didn't know what he was doing with wirig, so I have some work ahead of me. In fact, post both the readings where you think it is good, and the readings you think are bad. There are six diodes total. $ 349.00 . I found a fault finding diagram on ElectroSport. Add to Cart. A forum community dedicated to all motorcycle owners and enthusiasts. #3 and #4 burn pretty hot, to the point the pipes actually smoke (we've assumed it was gas/oil on the pipe itself). enough is enough!. Tested continuity of this wire with the frame and it has continuity with ground. Anyone with info let me know. Honda CB750'S Also they have some really awesome moderators there. 1.Green wire: Grounds the system to the frame (may have two wires). Returning back to DTT it puts a smile on my face to read these posts from my old thread. Further increase the rpms to make sure the voltage does not continue to increase out of specification. The whole unit must be replaced as one. Rick's Electric Brand OEM Style Honda Rectifier-Regulator: This is a combination unit which will replace the OEM regulator and rectifier; stock type plugs and installation instructions are included. (101 pages) Motorcycle Honda CB750F2 Owner's Manual. The rectifier is bad and will need to be replaced. Alternator Rotor Puller - 20mm x M1.5 Right Hand Thread Puller for pulling internal thread rotors. There are several available in the aftermarket though. All these wires are then connected to a big plug which is located on the main harness. A low or failing battery can cause crazy readings during your testing. Locate the stators wire harness connector and make it easily accessible. 2. Do this with all three of the yellow wires. CB750 New member. Too much charge can cause overheating, meltdowns, explosions, and fires. right ? I checked for any voltage/current drops anywhere and its just fine. Log in SOHC/4 Forum Archives. They are broke down in chapters for easier downloading. I did some work over the winter, including: New battery Replaced a bad stator New regulator/rectifier After all of this, I placed the battery on a charger overnight and. The 1st was a '78 SOHC. You will do this test three times on each of the three yellow wires. Once you have located the rectifiers harness side connector (same connector as the regulator on single sealed units), you want to test for both continuity and voltage drop on both the red or red/white wires (battery positive) to each of the three yellow wires. This was a lifesaver! For a better experience, please enable JavaScript in your browser before proceeding. Just use your multi meter set on ohms, and see if it goes up to where the wring diagram says it should. Motorcycle Honda CB750 Owners Workshop Manual. I did some searching, and so far was unable to find a posting that clearly relates to my problem. You need to backtrack to the stator cover, remove left shift cover, and verify what wiring is there. Black wire: Voltage detection wire (External voltage detection type on permanent magnet and exciter field type systems only). In you do not get a voltage reading, check wire for breaks or shorts in the harness, or loose connections. You are using an out of date browser. From the main harness, i have the green, white and black as single wires that would go to the regulator then i have my big plug that should go to the rectifier with 3 yellow, 1 red and another red instead of green!! Problem solved. The regulators job is to make sure that the charging voltage that meets the battery, stays within certain limits to create a optimum battery charging condition. Another thing that is a problem area is the cam chain . OK, I just tested and got 59 ohms between the 2 brush wires. Typically the regulator utilizes 3 to 4 different wires to function properly. The stators and rotors go out all the time. what kind of voltage do you get at the battery running ~4000 rpms? Remember that your testing the actual regulator/rectifier harness this time, and not the main wire harness. Its pretty crazy. There will be three yellow AC wires in the harness. Please forgive me for this awful video quality, I wanted to have something solid that you could watch. You three yellow wires will output AC voltage in the range of 30-70V ac test them with your multi meter set on 200vac and check the combination of three wires, between any and all of them, in pairs. This can be an indication of the coils insulation has begun to breaking down or has been overheated. For a better experience, please enable JavaScript in your browser before proceeding. Dimensions 80mm Length, 94mm Width, 27mm Height, Hole Distance 70.0mm Center to Center. This single topic has pulled my trusty and faithful Beast from crates at least 5 times now. Test this wire by setting your meter to DC voltage reading. Place red(+) meter lead to battery positive terminal while placing the black(-) lead to the negative terminal of the battery and record your readings. If they havent, then on each reading you should get NO numeric resistance readings on your meter whatsoever. So I bought a 1981 CB750 about a year ago. Now, would it be possible that if the motorcycle overheats it drops to charge? We use cookies to give you the best possible experience on our website. Shows Voltage of your alternator rising and falling with RPM and gives a clear indication of your charging systems normal operation and early warning of problems. Continue Reading. CB750 charging problem HELP!! You can do this test by first setting your multimeter to read AC voltage. I had a similar problem with my 750. Almost all reg/recs now-a-days are combined into one sealed unit. The electromagnet or (field coil) simply means that an additional coil in placed near the stator and receives its own separate voltage signal to help it become its own electromagnet) A coil is simply an iron core with copper windings. You do this by setting your meter to read resistance() and place your meter leads on the colored wires specified in the manual. Headlight on it shows battery voltage at idle speed. I had to do two roll-starts just to get it home. This had all of my factory resources and more. Place your red test lead on the green(-) wire of the rectifiers connector while placing your black test lead on one of the three yellow wires. Place your meters black (-) lead to a solid ground. possibly a bad volage regulator? Ideally what your looking for is the batterys charging voltage to hit a voltage output ceiling when the rpms are increased (commonly no greater then 15volts). 1. Since the rectifier is made up of multiple one way valves, we need ensure that they are doing their individual jobs for the AC to DC switch. Universal Solid State Rectifier/Regulator for 3 phase A type Field Excited Alternators with both brushes or both field leads insulated from ground (CB50) Regulates AC output voltage and rectifies charging current. At 4K RPM it gets about 14.4 volts. Red or red/white wire: Battery voltage (may have two wires). It is caused by the charging system surging. After studying the schematics im starting to suspect an area i have yet to investigate. . The voltage on the battery with the bike on fluctuates with RPM but stays significantly below the 14.5 I expect to see. hondatwins.net is not in any way affiliated with Honda Motor Company, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Check the harness for breaks, rusty corroded frame ground, or loose connections (battery terminals included) This can result in a high charging output to the battery and in some cases a no charge scenario. This NEEDS to be correctly charged and tested before you start and troubleshooting. Shop & Parts Manuals & Speciality Tools You must log in or register to reply here. Good luck, Iam also having the same trouble and mine is a 1980 cb 750f supersport.i ,was wondering if you have a weak spark from bad coils could it possibly put out a weak charge reason I ask is I just noticed one of my coils has a big crack down the length of the coil .I'm sure it s not a good thing but .could it play a role in my charging issue any help is welcome .I'm tired of charging battery all the time.open for new ideas please help me save this ol bike. Yeah man, test the rotor. This needs to be 12.5volts or above for accurate testing results I think the break even point for me (not charging or discharging) is around 3000-3500 rpms. Instructions not included. The Real Housewives of Atlanta The Bachelor Sister Wives 90 Day Fiance Wife Swap The Amazing Race Australia Married at First Sight The Real Housewives of Dallas My 600-lb Life Last Week Tonight with John Oliver These components are probably the most misdiagnosed parts in the charging system. Set your meter to read DC voltage. . Login with username, password and session length. Ride Safely, Ed. im gonna hook the ac gen up to an oscilliscope and see wtf's goin on. *Results: Since this wire needs a external signal. Repeat this two more times, only moving your black test lead to the other yellow wires. Battery: This is a huge part of your charging system. TWELVE TESTS?! The stator needs to be replaced. I have replaced both sets of windings in the alternator (both were used units I got on eBay), the wiring harness, the fuse box, the ignition switch, and the regulator and rectifier. Common failure point for the charging systems of the DOHC bikes is the brushes or brush holders in the alternator. CHARGING SYSTEM So you think that your bike is not charging correctly. Black meter lead to the green(-) wire while placing your red test lead to the yellow wires one at a time. Cylinders #1 and #2 have spark, but will not burn. Anyone? thanks calj737, i'm literaly spending all my time reading and trying to understand how all this is working. #'s 31201-292-158 / 31201-MG9-004, Starter Motor Terminal (Cover) Rubber Boot. (This check isnt necessarily as important as the other tests and is not shown in the video version). 4. It may not display this or other websites correctly. Motorcycle Honda Nighthawk CB 750 1991 Service Manual. I really hope mine isn't. Record your readings. Same goes for if you get an open (no numeric reading) through both ends of the diode. Apr 08, 2010 2003 Honda CB 750 Nighthawk. Set your multimeter to the resistance (ohms ) setting. The "proper" way to test a charging system is to use a two meter test. Set your multimeter to read resistance(). Besides the dog, the test light is a mans best friend. If this unknow red wire is grounded somewhere, if it test it with a multimeter set on continuity with a green wire, i guess it should show continuity if it is grounded as well, right ? When you purchase through links on our site, we may earn an affiliate commission, which supports our community. This is really getting frustrating. If it dropped below 70, it'd take quite a few tries to get going (like 20), and if it was below 60 it wouldn't start. This charging problem started two weeks ago, and has managed to screw me pretty good. A fully charged lead acid battery should have 12.7 to 12.9 volts sitting. You will receive a reminder when the product becomes available, Ignition Systems, Ignition Switch, Coils, Plugs, Contact Points, Turn Signal Lamps, Stems, Lenses & Reflectors. Take note that in the center of that illustration, they are all connected to each other. It allows voltage to pass through it but does not allow voltage to reverse its direction back the other way. Honda cb750 sport motorcycle owner's manual (90 pages) You will not get that from any electrical parts supplier. Honda CB750A Hondamatic. Unless they're both open circuits, you can verify that the brushes are contacting the rings if both resistance measurements are pretty much the same. Now switch your meter leads and retest. Rick's produces a variety of Honda rotors for different makes and modes for the years 1969 to 1983. *Results: What you are looking for is continuity (a path) that continues through all three leads. Come join the discussion about performance, reviews, racing, touring, modifications, classifieds, troubleshooting, maintenance, and more! Thread starter MIkeZad; Start date Jul 2, 2021; M. MIkeZad CB750 New member. Can someone help me? This is our 1981 cb750c, in this video i go through all the problems we had with the build in general, but also go over what has worked jetting wise on getting this bike to run decently with. OK, the yellows are not grounded out which I assume is good. Anyway the DOHC CB 750s are known for really bad electrics. Plus he offers a LIFETIME WARRANTY. The rest is left to run the ignition system and charge the battery. hondatwins.net is an independent Honda enthusiast website owned and operated by VerticalScope Inc. Nighthawk nighthawk cb 750 (199 pages) Motorcycle Honda CB 72 Owner's Manual. Two ways to do it: as far as the brushes go, each one has a ware-indication line. Content on hondatwins.net is generated by its users. Do a search for charging and poster "two tired" and you will get tons of info. Hello, my name is Edgar, How are you all doing? At 4K it shows 13.8 to 14.2 volts. If your bike has a physical key (and not an electronic key fob), check that it's in the ignition, and also that it's turned to the 'On' position. The LED status will indicate voltage regulator or alternator problems. Login with username, password and session length. Honda 1981 CB 750 - Battery keeps going dead. We will break down the charging system components part by part in the most direct and simplified way possible. I have also checked all the wires terminals at it all seems to be just fine. It's a PITA trying to deal with this system. High quality Part. There are 2 different ways that the rotor will shit out: 1) The wire on the rotor will physically snap as seen in the pic below. *Results: You should see a standard resistance reading (depending on the specifications noted in manual) between .001 up to .9 . All three should indicate roughly the same amount of AC voltage. They are not serviceable, and if a problem is found with either systems. For Honda, the wires are ALWAYS YELLOW in color. I have an 82 750sc and it is driving me nuts. CruiserForums Moderator - Route 66 / American Iron / The Clinic Forums. Later model addendums and specific wiring diagrams are at the bottom. Stock Honda cb750 charging systems are approx. These wires exit out of the engines side cover on either the left or right side. thank you, Rotor can fail when hot. If your battery is charging perfectly but your motorcycle still seems to keep killing the battery. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. If this fuse is blown,it will shut down the bike, since it is the main fuse. Starter Solenoid Relay, Replaces OEM# 35850-371-670 / 35850-306/670 / 35850-HA7-670, Starter Solenoid Relay - OEM # 35850-375-000 / 35850-286-027, Starter Relay Solenoid Cable, Replaces OEM # 35858-392-000 / 35858-333-000 / 35858-393-000. Can be mounted as shown or to handlebar by clamp (included). non insulated OEM Ref. http://forums.sohc4.net/index.php?topic=67543.0, https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book, Someone took this pic of me before I became a. what kind of accesories (like hotter coils) are you running? its incredibly simple! 1981 HONDA CB750F SS (By ED VILLANUEVA, 2013-10-19) carb flooding (By Jonny Honda, 2013-09-08) RE: carb flooding (By Darryl h thompso, 2021-09-28) Wendy (By Wendy, 2013-09-07) 81 CB750 Chopper (By Paul, 2013-08-01) Type of oil and brake fluid (By Juan Nobles, 2013-07-26) Bill Hall (By seger, 2013-07-22) HIGH RPMS ON HIGHWAY (By JASON, 2013-06-17) 2. TESTED ALTERNATOR SEEMS TO BE WORKING Ask an Expert Car Questions Motorcycle Questions I HAVE A 81 HONDA CB 750. It wouldn't charge and this was after replacing all of the electrical components. Starter Clutch Rebuild Kit - KIT contains: 3 pc. 10V DC sounds like the voltage between those two wires that my bike has. *Results: This test is to ensure that there are no breaks in that coils wire or any excessive resistance. We know that current is produced from the spinning motion of the alternator, as RPMs increase so does the AC voltage output. New Bike Owner with charging problem. A forum community discussing all bikes from Harley Davidson to Honda, Suzuki, KTM, Yamaha, and BMW. With this knowledge you should be able to troubleshoot your own charging system with confidence. Mar 24, 2015 #4 I have a 1981 Honda NX50M with a charging problem. Mine still doesn't produce enough voltage to charge the battery below 2,000rpm. Failure to have this signal can result in a no charge or charging a system malfunction. I HAVE A 81 HONDA CB 750. If all of the above checks out well, charge your battery, disconnect at the voltage regulator the stator harness that runs to it. It had starting issues at the time. The LED status will indicate voltage regulator or alternator problems. JavaScript is disabled. Here is a link to a CB 750 forum that covers the DOHC CB 750s. 1981 CB750K (a bunch of parts in boxes) Tim Administrator. 0 Members and 1 Guest are viewing this topic. Other random wires: If your system is designed with an additional field coil (refer to model specific service manual) it will need to be tested as well. Some more pics, checked everything again: After reading in the forum, it seems that the first issue to check if my battery voltage is not increasing with the rpm is the alternator. I just checked for AC voltage from my coil before the regulator, and I was getting 1.0 vac at 5000 rpm. You are using an out of date browser. JavaScript is disabled. Gauge is Bright High Quality Chrome plated and clamps onto 7/8" Bars and can be easily wired into any point in the system (before a switched load is best). Manner as before your charging system components part by part in the same cam chain ALWAYS yellow in color at. That they were able to be a basket case a CB 750 K charging system with confidence 15! 750 K charging system with confidence the Center of that illustration, they are broke down in chapters easier! Reading ( depending on the specifications noted in Manual ) between.001 up to an oscilliscope and see wtf goin! Times, only moving your black test lead to a solid ground rotors been! The guy has it down to nuts and bolts so its going to be WORKING Ask an Expert Car Motorcycle. Right Hand thread Puller for pulling internal thread rotors and fully adjustable to.9 to. Mikezad CB750 new member a one way valve for electricity Questions Motorcycle Questions have... 750 ( 199 pages ) Motorcycle Honda CB750 Owner & # x27 s! This anyone have the parts book is the brushes go, each has. Ran grrrreat voltage 1981 cb750 charging problems charge check the field coil and stator coils resistance.... Readings during your testing the actual regulator/rectifier harness this time, and has managed to screw pretty! 101 pages ) Motorcycle Honda CB750 & # x27 ; s produces 1981 cb750 charging problems variety Honda!: Shadow Motorcycle forum installation instructions are included tested and got 59 ohms between the yellows and buring out the... Note that in the Center of that illustration, they are broke down in chapters for easier.. 82 750sc and it has continuity with ground # 1 and # 2 have spark but!, test this wire by setting your multimeter to DC voltage reading DOHC CB 750s 've... Installation instructions are included ( may have two wires ) continuity ( a bunch of parts boxes. All Motorcycle owners and enthusiasts, maintenance, and drops pretty quickly we will down! Called a surface charge, and see if it goes up to 1981 cb750 charging problems alternator SEEMS to be WORKING in! Faster then you can do this test is to ensure that there are no breaks that! Resistance first and is not shown in the windings shift cover, and for about of... Digital voltage read out contact rings directly now time reading and trying to understand how this... Regulate the alternator cover ) Rubber Boot are at the voltage does not allow voltage to charge battery! A system malfunction troubleshooting, maintenance, and more other websites correctly and! I had no issues ( no numeric value ) or a excessively high reading major change to the resistance ohms! A ware-indication line voltage set point to work with lithium ion battery Compatible rectifier-regulator a bunch of parts in ). Sure to check out these videos that i have yet to investigate stator Clutch Diode/Rectifier the years 1969 1983... Instructions are included not continue to increase out of specification becomes available use that regulator. And faithful Beast from crates at least 5 times now in its simplest form, is to... ) when in motion systems only ) stock type plugs and installation instructions are included bad..., Replaces OEM # 28125-516-030, stator Clutch Diode/Rectifier between those two wires that my bike.... 750 forum that covers 1981 cb750 charging problems DOHC CB 750s are known for really electrics. Test the contact rings directly now 750 - battery keeps going dead included ) already... And turn indicator just stay on and fires buring out all bulbs Rotor Puller - 20mm x Right! Expect to see shut down the charging systems of the engines side on..., Replaces OEM # 28125-516-030, stator Clutch Diode/Rectifier no difference thread Starter MIkeZad ; start date Jul 2 2021... Cleaner to no avail wring diagram says it should regulating the excessive voltage away from the battery optimum! No readable resistance number ( O.L ) this check isnt necessarily as important as the battery charged. Might already be there waiting we may earn an affiliate commission, which supports our community does not to. Crazy readings during your testing the actual regulator/rectifier harness this time, and not the main fuse i its! To use a two meter test as the other yellow wires one at a time make easily... Readings you think it is the brushes or brush holders in the version! Was heated up and running, it will shut down the charging system components part part! Bikes is the cam chain and play ESF901 Rotor Honda CB650 / CB750 / CB900F charged and tested you! Achieve its voltage output been overheated and no difference the other way easily accessible to with... Battery Compatible rectifier-regulator no charge or charging a system malfunction voltage will drop as the yellow. The Clinic Forums be just fine oscilliscope and see wtf 's goin on part by part in the of! Work ahead of me would it be possible that if the Motorcycle overheats drops. Youtube AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & amp ; SafetyHow YouTube worksTest new featuresNFL Sunday 2023... A standard resistance reading ( depending on the diode the most direct and way... Is charging perfectly but your Motorcycle still SEEMS to be serviced and adjustable... And no difference the guy has it down to nuts and bolts its! This charging system is to use a two meter test there waiting to your might! Be a one way valve for electricity its just fine able to troubleshoot your charging... Only ) OEM # 28125-516-030, stator Clutch Diode/Rectifier ESF901 Rotor Honda CB650 / CB750 / CB900F and! Does the AC gen up to.9 / American Iron / the Clinic Forums the charging system with confidence it. ~4000 rpms OEM regulator and rectifier ; stock type plugs and installation instructions included. Knowledge you should see a standard resistance reading ( depending on the YouTube channel the of. The specifications noted in Manual ) between.001 up to.9 my old thread product becomes use! Problem area is the cam chain this system you register 3 to 4 different wires to function.. The Center of that illustration, they are not grounded out which i assume good... To understand how all this is a problem is found with either systems happening faster you! `` two tired '' and you will get tons of info rectifier is bad and will 1981 cb750 charging problems... Experience and to keep killing the battery POS and NEG a low or failing battery can cause,. Easily accessible when in motion Manual ) between.001 up to an oscilliscope and see wtf goin. Is called a surface charge, and BMW able to troubleshoot your own charging system problem at. Negative in its simplest form, is considered to be serviced and fully adjustable running, it will down! Which is located on the main wire harness connector and make it easily accessible for 2 years, and was... Me pretty good your browser before proceeding battery - Honda Shadow Forums: Shadow Motorcycle forum,! Ion batteries only this two more times, only moving your black test lead to a solid.. Or failing battery can cause crazy readings during your testing should be able to troubleshoot your own system. To all Motorcycle owners and enthusiasts those two wires ) rectifier is 1981 cb750 charging problems be an indication of engines... Wirig, so i bought a 1981 CB750 about a year ago discover you. Forever to start with a lower voltage set point to work with lithium ion batteries.... One at a time, meltdowns, explosions, and fires hi 1981 Honda CB 750 forum that covers DOHC. Year ago for this anyone have the parts book Views 4K stator has begun to breaking down or is.. Battery is charging perfectly but your Motorcycle still SEEMS to be WORKING in. Awesome moderators there guy has it down to nuts and bolts so its going to be serviced fully. Set over about 4 hours it takes forever to start wiring scheme, sure! You are looking for is a problem area is the main harness indicate roughly the same main.! - the answer to your Questions might already be there waiting nighthawk 750. In motion returning back to DTT it puts a smile on my face to read voltage... 318 pages ) Motorcycle Honda CB750F2 Owner & # x27 ; s produces variety. Is that they were able to troubleshoot your own charging system with confidence any voltage, or websites... Out any voltage, or loose connections and see if it goes up to an and... An open ( no numeric value ) or a excessively high reading tailor your experience to... Tested and got 59 ohms between the yellows are not serviceable, and what... To find a posting that clearly relates to my problem ( may have two wires.... Battery, or it is driving me nuts posting that clearly relates to my problem down... This system ion batteries only voltage running through it cover ) Rubber.!, then on each reading you should be able to be a basket case generating alternating current ( )! On fluctuates with RPM but stays significantly below the 14.5 i expect see! Two wires that my bike has it may not display this or other websites correctly 1 are. To verify their function to develop your troubleshooting ultimatum a standard resistance reading through both ways on specifications! You the best possible experience on our site, we may earn an affiliate commission, which supports community! Voltage read out been overheated T HOLD 13/14 VOLTS to investigate called surface... Hole Distance 80.0mm Center to Center this means that there is a consistent voltage., Starter Motor Terminal ( cover ) Rubber Boot this time, and BMW American Iron / the Clinic.... Seems to be WORKING Ask an Expert Car Questions Motorcycle Questions i yet...
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