thanx for the help guys. I'll probably look into the .18 piston and sleeve. I think I'll port the carb and the piston sleeve, since there is a little I can take out on each side of the two intake ports; but can anybody tell me why is there a fourth port in the piston sleeve? I ask this because it is blocked off the the cylinder walls and it is totaly useless. I have one more question: does the piston sleeve have any kind of coating inside of it? or is it just a brass sleeve? If so, I will not touch it.

thanx.