Aav8tor1977: Very good data you just added . I took apart a couple of engines for parts today. I wanted the crankshafts for mandrels for turing parts on my Lathe. I noticed it should not be to hard to press a craknpin out for use in a bigger Supertiger size of engine. There are lots of crankpins out there for free, with inexpensive rod bearings for converting a engine that will then run on like 40-1 or about any ratio you may want to try. What do you think. Capt,n