hey guys, i got a 2003 yamaha yz 125 n went for a ride n the spark let go, only spark while cranking slow when cranking fast the spark goes out any suggestion
Check the resistances on the stator. Sounds like your high-speed coil has blown. Had the same problem happen to me while I was out riding one day... all I had to get home was a little more than idle speed! My high speed was non-existant....