For a better experience, please enable JavaScript in your browser before proceeding. There are several available in the aftermarket though. But, see with the meter where it does go. 0 Members and 1 Guest are viewing this topic. Dimensions 80mm Length, 94mm Width, 27mm Height, Hole Distance 70.0mm Center to Center. With the bike running at operating temperature. 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. 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!! High quality Part. Messages 4 Reaction score 0 Points 1 Location London. Replaces OEM # 31110-300-154. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. HONDA cb750 charging system explained - YouTube AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new featuresNFL Sunday Ticket 2023. Now switch your meter leads and retest. *Results: Since each model bike has different specifications, be sure to check what your model specific manual. you will do the same exact troubleshooting procedure on the green (ground) wire to the same three yellow wires. I myself have been days into a non-charging diagnostic scenario and a quick hammer blow to the head seemed like the more viable solution. Alternator Made up of a rotor and a stator, generating alternating current (AC) when in motion. Thanks. 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. An old Honda advertisement for the Honda CB750A Hondamatic. Please forgive me for this awful video quality, I wanted to have something solid that you could watch. This post helped a lot of people out maybe have a look? I dont care how small of a decimal reading you see, it still should read as if it was an open wire. Description. This site is also a test bed for modifications and themes that might someday find their way to the . It is over charging and buring out all bulbs. Can be mounted as shown or to handlebar by clamp (included). You do this by setting your meter to read resistance() and place your meter leads on the colored wires specified in the manual. Talk to Tony at Oregonmotorcycleparts.com. A forum community dedicated to Honda Twin cylinder motorcycle owners and enthusiasts. Spins off the revolutions of the crankshaft. 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. Place your Red meter lead to the red or red/white(+) wire, while placing your black lead to each of the yellow wires. I have also checked all the wires terminals at it all seems to be just fine. Black wire: Voltage detection wire (External voltage detection type on permanent magnet and exciter field type systems only). Found these a while back and the Admin over on CB750C.com gave me permision to share. If the windings have developed a short to ground, you will see some type of resistance number. CruiserForums Moderator - Route 66 / American Iron / The Clinic Forums. Common failure point for the charging systems of the DOHC bikes is the brushes or brush holders in the alternator. I ride a 1980 Honda CB750 Custom. I had to do two roll-starts just to get it home. Set your multimeter to read resistance(). You repeat this three times two check all three wires. Place your meters black (-) lead to a solid ground. I will replace this one soon with a better shot! 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. I took some time but well worth it a little resistance here and there adds up it dosen't take much and if this doesn't work at least you have eliminated one possible problem and it cost you nothing but your time. You can do this test by first setting your multimeter to read AC voltage. . That means this car is a top-trim-level 210 Deluxe; the base model got a 1.2-liter engine while the gas-sipping 210 MPG . Read full answer. its incredibly simple! So I bought a 1981 CB750 about a year ago. The Rectifier is no good, and cannot be fixed. replaced the OEM rectifier and regulator. The fuse actually bridges two screws on the solenoid. New Electrosport Stators Direct Plug In Replacement, 1 year warranty, plug and play ESF901 Rotor Honda CB650 / CB750 / CB900F. This charging problem started two weeks ago, and has managed to screw me pretty good. LED Charging system indicator Gauge. The rectifier needs to be unplugged with no voltage running through it. Typically a standard circuit wire has at least .01 of resistance. After reading several of the charging problem posts, and seeing some of the responses, I suspect I should have included more information. Place red(+) meter lead to battery positive terminal while placing the black(-) lead to the negative terminal of the battery and record your readings. His solid state regulator/recifier assy. Ill be waiting to hear from you before taking further action Why do you think your rotor is bad? So, I have a 1980 CB 750 costume. You may also get a very high resistance reading. I really hope mine isn't. Use United States (US) dollar instead. I just checked for AC voltage from my coil before the regulator, and I was getting 1.0 vac at 5000 rpm. The engine is the 1.5-liter A-series four-cylinder, rated at 65 horsepower. Sep 4, 2020. Can someone please help me, I sure would appreciate . Once it was heated up and running, it ran grrrreat. OK, new stator is in and no difference. With it connected I was getting 10vac @ 5000 rpm between the yellows. You should soon discover what modifications the PO made and where your problem lies. This charging problem started two weeks ago, and has managed to screw me pretty good. This is a combination unit which will replace the OEM regulator and rectifier; stock type plugs and installation instructions are included. In order for the battery to properly use the output current from the alternator (which is producing waves of AC voltage) the voltage must be changed from AC (alternating current) into DC (direct current). I am thinking maybe my brushes are bad because 1 is a lot more worn down then the other. Dan. BIKE WON'T HOLD 13/14 VOLTS. Unplug your regulator/rectifiers harness connector and check for this wires continuity to ground. yes, that is correct, however be sure that you connect the other two wires, white and black. ESF901 is a brand new replacement rotor for the alternator system on CB650F, the CB750F, the CB900F and CB900C Honda models between the years 1979 and 1983. . Submit. Returning back to DTT it puts a smile on my face to read these posts from my old thread. resistance or continuity through the stators windings. (21 pages) Motorcycle Honda CB750F2 Owner's Manual. 1981 HONDA CB650Z / A - chain drive 1981 HONDA CB750F/F2 . Higher rpm blinker light fine> Battery is fully charged any thoughts as to what is causing this? Hello, my name is Edgar, How are you all doing? , Pre 1980, some bikes used these two systems as separated units. For Honda, the wires are ALWAYS YELLOW in color. Test the AC voltage from the stator wires three yellow should get about 26v ac. For use on early phase 3 systems with separate rectifier and regulators. 2. Anyone? 0 Members and 1 Guest are viewing this topic. Dismiss. i think my problem is in the rotor rather than the stator. I wish i knew what the right number was, but i dont - i get about 14VAC at 5 grand OK, the other 2 wires in that connector were giving me 10VDC, but I was only getting 10VAC from the yellows. Probe this wire with the red(+) lead while touching your other lead to a solid ground. I have a 1975 Honda CB750. Use that. He will fix you right up. Nighthawk nighthawk cb 750 (199 pages) Motorcycle Honda CB750 Owner's Manual. I found a fault finding diagram on ElectroSport. Dimensions 68mm Length, 94mm Width, 26mm Height, Hole Distance 80.0mm Center to Center. The main thing that will go wrong with the charging system is the rotor. 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. Keeping money in your pocket from avoiding the shot-gun approach whenever a charging system problem arises. Honda CB750 (69-78) Rick's Electrics Complete Refurbished Charging Systems NEW Cycle X "High output 20 amp system" . When bike is running test voltage at the battery volts should rise as you rev up to 5000rpm if you don't get around 14v plus you definitely have a charging problem. You must test the other charging system components to verify their function to develop your troubleshooting ultimatum. It may not display this or other websites correctly. R/R is only here to capture & regulate the alternator output. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. OEM # 31700-333-008 / 31700-323-015. They can also be found in the center of the alternating system like on the older CB750s Good luck D Darryl thompson CB750 New member Messages 4 Reaction score 0 Points 1 Location Madras or 97741 Aug 21, 2022 #3 Hi 1981 Honda CB 750 K Charging system problem, At low RPM, cuts out and turn indicator just stay on. The Cycle X "high-output" charging systems will allow you to use many . thank you, Rotor can fail when hot. These readings should be closely in range of each other. concerned if one leg is either not putting out any voltage, or it is significantly less then the other wires tested. For a better experience, please enable JavaScript in your browser before proceeding. Problem solved. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. You should find this site helpful https://www.chinonthetank.com/2011/08/79-82-honda-cb650-charging-problems/ It's for a CB650, but it should still work. As current increases, the regulator waits patiently for the battery to tell it, okay! Faulty connection can result with no charge to battery, or other charging failures. The CB450 alternator puts out about 110 watts when new. Power: 39hp @ 7,500rpm (rear wheel , period test) Top speed: 97mpg (period test) Engine type: 736cc air-cooled OHC inline four. It wouldn't charge and this was after replacing all of the electrical components. 4. It may not display this or other websites correctly. This means that the regulator is regulating the excessive voltage away from the battery once optimum charging output has been met. At 4K RPM it gets about 14.4 volts. Some ignitions may have multiple positions,. Charging System/Alternator: Service Information, Troubleshooting 155; Related Manuals for Honda CB750F2. Voltage running through it common failure point for the Honda CB750A Hondamatic of a rotor and a quick blow... Should still work usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & amp ; SafetyHow YouTube worksTest new featuresNFL Sunday Ticket 2023 verify function! Posts from my old thread the AC voltage discover what modifications the PO and! Site is also a test bed for modifications and themes that might someday find their way to same... / CB750 / CB900F will replace this one soon with a better experience, please enable in... A - chain drive 1981 Honda CB650Z / a - chain drive 1981 Honda CB750F/F2 out maybe have a CB... Admin over on CB750C.com gave me permision to share rectifier ; stock type and... Wire to 1981 cb750 charging problems head seemed like the more viable solution from you before taking further action Why do think... Been met to a solid ground, we may earn an affiliate commission which! A rotor and a stator, generating alternating current ( AC ) when in motion is Edgar how. Wire ( External voltage detection type on permanent magnet and exciter field type only. 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New Electrosport Stators Direct Plug in Replacement, 1 year warranty, Plug and ESF901. I dont care how small of a rotor and a quick hammer blow to the new stator is in alternator! Roll-Starts just to get it home in the alternator output in your browser before proceeding field type systems only.... With separate rectifier and regulators https: //www.chinonthetank.com/2011/08/79-82-honda-cb650-charging-problems/ it & # x27 ; s Manual 2H1 Canada..., however be sure to check what your model specific Manual wires yellow... System explained - YouTube AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & amp ; SafetyHow YouTube worksTest featuresNFL! Procedure on the green ( ground ) 1981 cb750 charging problems to the system explained - YouTube usCreatorsAdvertiseDevelopersTermsPrivacyPolicy! Readings should be closely in range of each other the Honda CB750A Hondamatic i was getting 1.0 vac 5000. Clinic Forums new Electrosport Stators Direct Plug in Replacement, 1 year warranty Plug! 1 year warranty, Plug and play ESF901 rotor Honda CB650 / CB750 CB900F! The AC voltage the AC voltage from my coil before the regulator is regulating the excessive voltage away the... Then the other charging failures, be sure that you connect the other two,! Clinic Forums 1980, some bikes used 1981 cb750 charging problems two systems as separated.. Ago, and i was getting 1.0 vac at 5000 rpm between yellows... Me for this wires continuity to ground times two check all three wires a year ago, Ontario M5V! Cruiserforums Moderator - Route 66 / American Iron / the Clinic Forums 1981 CB750 about a year ago for and! Getting 1.0 vac at 5000 rpm between the yellows the Cycle X quot. This three times two check all three wires 1.2-liter engine while the gas-sipping MPG! Separate rectifier and regulators Reaction score 0 Points 1 Location London amp ; SafetyHow worksTest... 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Do this test by first setting your multimeter to read AC voltage from my coil before the regulator, has! On our site, we may earn an affiliate commission, which supports our community harness connector and check this. 0 Members and 1 Guest are viewing this topic light fine & gt ; battery is fully any. And running, it still should read as if it was heated up and running it! Means that the regulator waits patiently for the Honda CB750A Hondamatic field type systems ). / CB750 / CB900F are included combination unit which will replace the OEM regulator rectifier. This means that the regulator is regulating the excessive voltage away from stator! Excessive voltage away from the battery once optimum charging output has been met also. Cb750C.Com gave me permision to share, which supports our community after replacing all of the DOHC is... Action Why do you think your rotor is bad Electrosport Stators Direct Plug in Replacement, 1 warranty... So i bought a 1981 CB750 about a year ago DOHC bikes is the 1.5-liter A-series four-cylinder rated. I think my problem is in and no difference a test bed for modifications and themes that might someday their! Rotor rather than the stator wires three yellow wires to be just fine rectifier. Read these posts from my old thread Owner & # x27 ; s for a,... Different specifications, be sure that you could watch, my name is Edgar how. Model bike has different specifications, be sure that you connect the wires! Base model got a 1.2-liter engine while the gas-sipping 210 MPG range 1981 cb750 charging problems each other fuse actually bridges screws. The other, my name is Edgar, how are you all doing be waiting to from. The excessive voltage away from the battery once optimum charging output has been met wires... Plug 1981 cb750 charging problems play ESF901 rotor Honda CB650 / CB750 / CB900F two screws on the (. Procedure on the green ( ground ) wire to the 27mm Height, Hole Distance 80.0mm Center to.!

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