My ID numbers differ somewhat from what have been given on the posts relating to the tsb on the flywheel. Somebody enlighten me. On Rowdy's post he lists the serial #s affected as CJ04W-0000037 to CJ04W-0003669. Mine is JYACJO4313A000???. Of course the ??? is for privacy and I am assuming the hyphen in Rowdys is to shorten and leave out several unnecessary numbers and maybe even leaving off the JYA is for brevity but I have no W in mine. Is it possible they stopped the run of bikes and started it back up (after correcting the problem) with a different series of numbers. My bike is about dead center of the listed ID numbers that have failed (except for the possible discrepancy in #s) and I have 2 enduros and about 250 hard trail rides on mine and no problems.