Hi, I hate to ask this as im sure there are plenty of threads about it already!! If so a link would help alot!! I can't find any that explain it well enough! But I have the photos and know all about the timing marks, also understand that the cams have to be aligned not by the sprocket but by the pin. My question is not so much about the timing marks only all line up again after 7 rotations but say its all apart and i have cylinder 1 at tdc does that always put the crank sprocket at 12 and how do i know if thats the firing stroke or does it matter since it has a positioning sensor? So once i have Cylinder 1 a tdc then i put the intermediate sprocket at 6 o'clock then do the cams. Does this sound correct? I guess my question is if cylinder 1 is up the crank will always be at 12 and that's that right?