Question about Yamaha Motorcycles
Have you tested the voltage at the battery while the bike is running? you should check twice once at idle and once at the point where your lights are popping. if your battery is getting more than 14v then its possible your stater is going out or needs to be adjusted. im not very familiar with that bike but that's where I would start looking. also test your rectifier make sure its working to spec.
Posted on Aug 02, 2013
Testimonial: "I have tested the voltage at the battery, 8 volts at idle and 18+ volts at higher RPM. How do I test the stator and rectifier? "
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Posted on Jan 02, 2017
SOURCE: bad regulator?
Fuse 2 is actually the fuse from the regulator to the battery (see schematic below) - so if it's blown then you are not charging the battery. Put the correct fuse in - if it blows again, you may have a shorted regulator. Unplug both connections to the regulator: With your test meter set to 'ohms' check in turn between each of the three yellow wires in the 3-pin connector to both the red & blacks in the 4 pin connector (the two reds are already connected to each other, as are the two blacks). Also check between the reds & the blacks. None of these should readings be 'short' (zero ohms). Inspect the wiring at the three-pin connector - if the bike's harness looks charred/burned that is a sign the regulator has shorted. There is possibility it could have taken the stator with it. Incidentally, the cable that plugs into the three pin connector - that should be a replacement auxiliarry harness: the original was deemed too small gauge for the job & was replaced with the auxiliary one as a recall. You should find that cable is stand-alone from the main bike harness and you can follow it back to the stator output connection. At both ends you should find the connectors of the original harness that is 'laced' into the complete harness. If you do not find that auxiliary harness, you need to get it. You should be able to get it at no charge from Triumph if the records on your VIN show it was never supplied.
Posted on Nov 10, 2008
I posted back in your initial post here. A few ideas to consider/try:
Posted on Feb 13, 2009
check all your male and female connections on your wires for corrosion and also make sure they are matching with the right colour coated wire
Posted on Apr 25, 2009
How's the battery holding up? Check the voltage on the battery and also check to see if it is bubbling a lot. 13.8V is optimal for the battery charging with the engine running, but up to 14.4 is common. If it's running a lot over that and the battery is making a lot of bubbles, probably the regulator is the problem.
If the battery is low on electrolyte, the regulator doesn't have anyplace to dump electrons, and that could also be a problem, so make sure the battery connections are good and tight, too.
Posted on May 21, 2009
Common problem with poor quality parts, the regulator is the problem, the generator is working other wise you would not have fried the wiring, you answered your own question. someone telling porkies to get more money from unsuspecting client?
The regulator controls the voltage not the generator, the generator only supplys the voltage it cannot overcharge unless the regulator is not working properly, simple!
Posted on Jul 28, 2009
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