The stator plate came loose on my 1981 XT250. The bike apparently ran for some time with a pretty loose stator because when it finally did stop and I took off the ignition cover, it was loose enough for the lighting coil on the stator plate to be dragging on the flywheel magnets. Anyway, no spark now. I can see some minor damage on the aluminum of the stator plate itself where the flywheel rubbed. It's right across the wires for the pulser coil, although the actual wires, which sit in a recess, don't look like they were touched (grime still on the insulation). Still, I figure the shock of the stator hitting the flywheel knocked something loose--and the markings on the plate hint at the pulser coil--but the OHM readings check fine for: the pulser coil, the charging coil, the ignition coil and the plug cap. This leaves the CDI box, but I don't see how the loose stator caused that. So, do these clues suggest I need to analyze the stator coils more thoroughly or just assume it's the black box--i.e., could it have been damaged from this happening? (FYI, this XT has had the battery and lights removed.) Thanks.
Read what www.electrosport.com has to say about your stator. They may or may not build replacement stators, but they have information about stators even when they don't make one for your machine. Are the magnets still strong? Rubbing against the stator may have weakened the magnets. Do you get any reading between the CDI source coil and the crankcase on R X 1000 ohms scale? Maybe the CDI coil is shorted out? I would guess that the CDI source coil would put out 50 to 100 volts. The pulser coils probably put out 1.5 to 2.0 volts when the engine is kicked over. You'd probably need an analog voltmeter (needle type) to see the output from the pulser coil, a digital meter would be too slow to respond.
James, Ricky Stator will check out your stator and pulser coil. If it doesn't need repair, he will send it back to you for only the cost of shipping. He has done this for me several times, and has also stood behind his repair work (eating the shipping costs). Tell him that I sent you. Jim Cook Smackover Racing Gas Gas DE300 Team LAGNAF www.smackovermotorsports.com
Thanks, Jim. Actually, I checked everything again and I must have missed something before because the pulser coil came back bad (~20 OHMs). A few weeks ago, I got an '84 XT stator plate (all coils) and finally got around to splicing in the '84 pulser coil. The connections were different ('84 grounded on stator plate and ran one wire to the cdi while the '81 ran both up), but I got a spark and it runs same as before (meaning lean). Thanks, again
