RE: another darn ryobi post (ryobi performance modification, analysis and comparison)
as far as case volume goes, i have done no mods. basically i have a new jug bolted on an old short shaft case, with a one ring piston. I really need to get a frank bowman ring for this, cause the gap is huge, and compression is down. Since it hasnt run very long, the ring may need to seat again before i will get any real compression. I wish that i had a recent pic of what i did to the ports, but the pics were on a computer that has crashed.
Edited cause I found out how to get the pic from the other thread...