hey guys, i'm new to forum and i've got a question.has anyone had , seen , or heard of the timing gear spinning on the cam? it's a 06 kfx 400 every thing stock except a two brothers exaust. this has happend twice in two weeks.the first time i reset the timing by the cam marks not by the gear marks.then it happened again. i ride it no different than my 03 i had.any thoughts?