I recently purchased a 2001 YZ426 with tranny problems. I replaced the gears and now have completed assembly all the way back to timing the cams to the crank using an article in a dirt rider mag for torques. The problem that I have is my manual off of e-bay has not arrived yet and I am unsure of cam positions. Both cam sprockets look the same with three timing marks each. One marked with an E (for exhaust) one with an I(for intake) and another with no letter designation. In addition to this on the flywheel there are three marks with no letter identification. Two of the marks on the flywheel are connected by a horizontal line. I would guess that these are the firing marks and the third mark is the TDC, but I am only guessing. Any help would be greatly appreciated.