[shaolin]

Hey guys! This is an awesome forum. And I'm impressed at all the knowledge. Maybe someone here will have a solution to my problem. I have an 84 DR250. The bike is like new. New engine... everything. However... The bike starts and runs perfectly for about 20 minutes... then dies. If I let it Idle it dies faster. If I'm riding hard, it will last longer. Now it's at a point where it won't even start. The carb has been cleaned and adjusted. The light comes on when kick starting, so I think the magneto is ok. There is lots of compression. Any ideas????

 

[pitbull76]

Sometimes, coils will fail when they heat up. Have you checked for spark when it won't start?

 

[shaolin]

Even when it runs, I have trouble getting spark because the motor is painted. (no ground), but I think I'll sand a spot and check it.

Thanks

 

[Clint]

Rather than sanding the finish off your motor, just hook up a jumper wire to a bare bolt or bracket. :!:

 

[shaolin]

Yeah... did that. Don't know why I was thinking of sanding.

UPDATE: I tried another coil (same cdi) and still can't get spark. Also tried different Plug. New coil make more voltage. Also tried coil from non-cdi system, and got lots of voltage. Anyone know how much voltage I'm supposed to be getting when kicking, and where? Also, anyone know if a non-cdi ignition should work?

 

[shaolin]

Problem Solved! It turned out to be the pickup beside the magneto. When the engine got hot, that pickup would stop telling the CDI when to pulsate the spark.