justin_o_guy2 wrote on 04/15/21 at 16:54:56:The plug fires TDC,each time. Don't freak out. As long as you got the cam timing marks right, you're golden.
If someone says otherwise, I'll be surprised.
Caveat
The piston at tdc, and cam timing marks at the same time.
You can check that by putting it on tdc,, compression, and making sure all valves are adjusted right. Just a finger shake on them, they need to feel very similar if exhaust are tight, intake loose, or vice versa then you let the piston drift down while you were focused on the cam chain. Ask me how I know.
But no biggie.
Drain the oil
Pull the exhaust
Pop the side cover
Yeah, everything to get the cam chain off
Get it on tdc
And don't use a ratchet.
An extension, breaker bar, vise grips, or a friend to keep the piston from moving.
If you can get tdc and hold it till compression leaks down the piston will stay up.
Rotate the crank CCW, only
If it gets away from you
Go around.
Don't back up.
Don't ask me why
I just know that is what the smart guys say.