I want to do a compression test on my 258 before I re-install it (I'm doing a complete rebuild). The engine was advertised as being rebuilt about 10K before I bought it (I've added maybe 3k), but then again the PO also said the frame and body were in "good shape".... (did I mention I'm doing a complete rebuild).
I've read a lot of threads about compression testing, but haven't read about anybody doing them with the engine out of the vehicle. I plan to remove all the plugs and crank it by hand. I hope to see results in the 120-150 psi range without a lot of variance. The engine really does seem to run fine, doesn't leak any oil, and doesn't seem to burn much/any oil. It does smoke, but I think maybe my carb was never adjusted properly and maybe was just running rich. I know I messed with the mixture when I was having issues on the trail caused by a in-operable charcoal cannister. I had to set it richer and richer to keep it running. Obviously I tried to adjust it back when I fixed the cannister issue.
Anyway, I just think running the compression test will give me a better idea if I should spend some $$ on a rebuild before I get this whole thinkg back together. Advice?