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omegajim · 05-29-2008, 10:49 PM

well, matt, I'm going to disappoint you, but 155 psi means you're still cooking nearly 10.5:1 compression.

One bar (atmosphere) is 14.7 psi. If the bike is meant to have 180 + to one, you're at nearly 12:1? or a little more?

More importantly, are all the cylinders close in compression to each other?

I have read that it is equally important that all the cylinders are close in compression to each other as it is to have good compression.

Needless to say, if you have 150 + psi, I think you will be fine.

05-29-2008, 10:49 PM	#26 (permalink)
omegajim M-J Lifetime Achievement Award Join Date: Jan 2007 Bike: 1980 Yamaha XS850 Location: Washington County, WI Posts: 10,389	well, matt, I'm going to disappoint you, but 155 psi means you're still cooking nearly 10.5:1 compression. One bar (atmosphere) is 14.7 psi. If the bike is meant to have 180 + to one, you're at nearly 12:1? or a little more? More importantly, are all the cylinders close in compression to each other? I have read that it is equally important that all the cylinders are close in compression to each other as it is to have good compression. Needless to say, if you have 150 + psi, I think you will be fine. __________________ "FREE TIBET!"* With purchase of one Tibet of equal or greater value. "I have a driver's license. It doesn't mean I show up at the Indy 500 with my morgan." Ducky- NCIS and until very recently, we were Wisconsin Tourism Federation ----- no really.