Help! Need top dead centre help

[Danp]

I'm changing my camshaft on my 150cc and I don't know which mark on the flywheel to use for top dead center.

Any advice?

[x-bird]

stick a straw down the spark plug hole and rotate the flywheel til you have it on the money. i don't trust marks ....

[2SlickNick]

On my Carbide it is the end of the long block on the left side of the T.
Check cam also for big center hole.
I noticed the line and the hole where on the money every other spin of fly wheel.

[REAPER]

On the gear on the cam you'll have 3 holes 1 will be larger and it needs to be on top, the 2 smaller holes should line up even with the top of the head. If both valves are closed then you should be on TDC

[Danp]

Thanks all for the assistance, including Tom. New cam is in and she rocks. Torque is great, but with the snow we had that day, I wasn't going anywhere fast. fishtails and drifting was awesome though! on a few dry spots, I notice it gets up to speed a lot quicker. With my 39 tooth sprocket, I might need to get some heavier variator weights. Right now, I'm running 10g sliders. I'll go up to 11 or 12 I think.