Bill Robison
What are you're thoughts on gas porting the piston on a Saito like is done on new YS engines. Which involves holes or slots cut in the top of the piston that come down behind the ring to help prevent blow-by when the ring gets a little worn by keeping out-pressure on ring.

Thanks to all for comments about castol vs. synth. oil in fuel. I would like to come up with a compromise for my Saitos and YSs. I do like them both.

Doug