What is a cam boss & what does it look like?This is on a 1998 ltf500.Trying to set the timing.
Thanks,Joe Wiley a.k.a. coyote2
Disregard this I've found out what it is.
Thanks anyway.

 

I'm not sure but it usually indicates a raised area like a bump on a smooth metal surface. Maybe you should consider letting someone else do this for you. Or purchase a manual. But don't screw around with it if you're not mechanically incline, like working on the old dirt bike? I speak from experience, I've wrecked a few pieces of good equipment in my time.
Chuck

 

ecorman1's correct; sometimes, an enlarged part of a shaft . . .

Sounds like you're looking for a timing mark.

Regarding valve timing, a ballpark hint:

Get the piston at top dead center (from marks on the rotor, or: stick a wire in the spark plug hole and feel when the piston reaches its zenith).

Then, rotate the cam until both intake and exhaust valves are totally closed; the rockers face totally the low side of the cam lobes--you are now VERY CLOSE to correct valve timing, if not right on.

Tree Farmer