I can run the bike for a while then it backfires and dies. I try to restart it and I found the battery was dead.. I had to push it to a place and recharge the batter and it started right up again, no problem..The Bike won't charge the battery but a charger can. Is this the rectifier, and how tough is it to change?
Rectifier and/or stator, could be the problem. Check the amperage out put with an amp meter at idle and at 3000 RPM to determine. Troubleshoot all electrical terminals, disconnect, clean, and apply a small amount of Di Electric grease to contacts. Corrosion causes a lot of problems and is common on bikes after a few years. The main ground wire from the battery to where it connects to the frame is important also. I have found this heavily corroded on a lot of bikes over 10 years old. Good luck, hope this helps.
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Replace the cam pickup in the nose cone on the right side of the motor. Due to heat cycles over time the epoxy melts and the wires fall out of the pickup. Pretty easy job to do, but you will have to reset the timing on the bike when you are done.
put a volt meter across the battery terminals, should read over 12v stopped and rise to 13.5v with the engine running.
If the voltage doesnt rise there is a problem with the charging circuit.
Be carefull starting from a car, as this can cause damage to the bikes electrics, as the bike tries to produce enough amps to charge up the car when the bike starts, and overcook electrics.
your carbs are dirty. and probably need to be balanced also... bring the bike bto a garage and have them cleaned by a profesional.... also after market pipes don't give your bike the proper back pressure .. that can mess up your carbs timing
Ck fuses and wire connections first. If no problem seen, get bike running and disconnect the ground cable @ battery. If bike dies the problem generally is in the stator or regulator assembly not keeping battery charged. Bike will run untill the battery is too low to keep the ignition system energized and the bike will die. If it continues running w/the ground disconnected, the battery could have a dead cell which will drain the battery in a very short time whether it is running or not.
sounds as if you have an issue with the charging system, try using a volt meter to determine if the bike is charging. To do so you will need to access the battery under the seat, with the bike running hook up the volt meter to the battery terminals, at idle you should have around 11volts when reving you should have around 13volts. If not you may have a bad stator or other electrical issues. good luck