ok, I just found out what the problem was. The left cylinder was using a base gasket, which was 10 thou too thin.
That gave me knocking in that cylinder. We are still getting some light knocking, so we are going to drop the compression a little more.
P.
We got 155psi
@patprimer
To much ignition advance.
To low octane.
Inadequate cooling. DON'T THINK SO, TEMP ON CYLINDERS IS 252F
Hot spot in chamber. DON'T KNOW
To much piston to bore clearance. NO
To much crank end float. NO
Insufficient piston to head clearance. DON'T THINK SO, LOOK...
I have a Velocette 250cc flat twin two stroke.
As nothing was available for the engine, we made the following modifications:
Wiseco Pistons
Nikasil steel cylinders
Modernized combustion chambers.
We just finished rebuilding it and started jetting.
The bike was very over-jetted and we brought...
