I know You take the cap off to see the flywheel, but which mark is top dead center? I'm trying to adjust my valves. Thanks

 

Line up the "T" for TDC .. The easiest way is to remove the top cover , remove the spark plug , (using the pull starter) you turn the engine over while watching the intake valve when the intake valve opens (moves down) then closes (moves up) then you use a good light (I use a mini-mag) and watch for the "T" (you will first see the "F" which is the ignition timing mark).. The "T" doesn't have to be dead on the index marks ..

 

Yup, what he said, I just did mine last night on my 450.

 

alright, Thanks alot guys!