You can either test the voltage from the rear brake wire or swap the positive wire from tail light to positive brake light. See if that works. Maybe it's just broken bulb.The 250 is definetly a nice little bike. Lots of power of a 250cc. I believe it's a '93?
For the 650, all I have left to do is get the brake light to work properly. The tail light works but nothing happens when I press either brake. And there's a wire missing from the horb
I had this problem with RPM bouncing to the max. I had it fixed, see post on Gen 1 sub.I took her for a ride. The RPM was spazzing and low speeds. It was backfiring/ popping like crazy. Doing 40, the rpm kept bouncing 4/5 to 10 beyond. Low speed I know is a clogged jet. The rpm. Timing?