Motorcycle Questions? Ask a Mechanic.
Hi, my name is ***** ***** I'll be working with you today.
The first repair you need to complete is to replace the voltage regulator. A failed regulator is causing your engine light to come on, your speedometer to quit, and your headlight bulb to blow. When the bike is revved above idle speed the charging system voltage is going too high and causing these issues. A new voltage regulator will keep that maximum voltage correct.
This correction of maximum voltage may also correct the issue of the bike shutting down after a few minutes. If not, then the likely cause is a failing crank position or cam position sensor. A good signal from both of these is required for the ignition system to work. When they begin to fail heat can affect their operation.
Thanks, ***** ***** a positive rating for my service today. P.J.
I think would be wise. You can verify the voltage regulator issue if you want. With a meter on the battery terminals you shouldn't see the voltage go above about 14.6 volts DC. If so, you certainly need a new regulator.
The electronics on your bike stop working around 15.8 volts DC.
Please don't forget to leave a positive rating for my service. Thanks, P.J.
You're welcome, take care, P.J.