No spark, electrical problem

[farmerj]

Hi all,

2005 DE300, no spark = no happy

The bike will actually start sometimes, but at more than 1/2 throttle runs badly. It seems like this problem progressed - intermittent one day, worse the next, wouldn't run the next.

It actually seems like after the bike heats up a bit, the problem worsens. After running for a few minutes, it dies and won't start again.

When I take out the plug, ground it, and crank over the engine I see a weak spark 1 time in 20.

I checked the wiring loom for breaks, and have replaced the coil. The ground is on the coil mounting bolt, right? I also disconnected the stop switch (I think)...black wire at the coil...

I've read a number of threads, and suppose a CDI swap is next - but wondered if the fact that it seems so worsen after warming up gives a clue as to the nature of the problem.

Thanks,

Jeff