A friend of mine has a 89 Big Boss 4x6 with a 250 2-stroke that had the threads that hold the flywheel nut on striiped. I re-threaded the crank and installed everything back together, but when I tried to start it nothing would happen. I moved the timing plate and it fired up easily. I statred it a couple of times with no problem. Abouth an hour later I tried to stat it and nothing happened. I checked the spark and its getting a good, strong spark. Next 1 switched ignition coils and still would not start. Next I peplace the excitor coil, no luck. Next I replaced the CDI unit, still no luck. Next I disconnnected the black wire from the CDI, still nothing, but still getting a good spark. Next I checked, the neutral switch and the throttle position switch, both checked ok. Next I switched carbs just to make sure, still good spark, no start. Battery is good. Next I checked the timing with a timing light, and could not see the timing makes through the hole in the case. I also replaced the flywheel key, no luck. Using the timing light, the tiimng marks are way off. If I move the timing plate, no matter where I turn the tiimng plate, the timing still stays way off. Next for the hell of it, I removed the flywhell key and moved the flywheel about 180 degrees off where it should be and tightened it down good and and checked the timing again. Still the same, no matter where I move the flyweel, the tiimng stays way off. I have checked the wiring for any breaks and can't find any. The only thing I haven't changed yet is the flywheel itself, it looks good with no broken magnets (that I can see). Is there anyway to check the flywheel itself, I don't want to spend about $150 if that isn't the problem. Is there anything that I am missing?