bikerjon Posted March 31, 2012 Report Posted March 31, 2012 Hey guys. I've done some searching and could not find the answer to my question.....maybe some of you gurus can help me out. Just picked up a cherry 96' shee that still has the original top end and runs great but i was still concerned about the condition of the top end. I ended up doing a compression check and they read 100 and 101 psi. I know that is low, but I live at 5500' and know that it should read a bit low compared to sea level but how much lower? Is there a correction factor out there to adjust for high altitude or should I just slap a new top end on it? Thanks! Quote
Finch Posted March 31, 2012 Report Posted March 31, 2012 Hey guys. I've done some searching and could not find the answer to my question.....maybe some of you gurus can help me out. Just picked up a cherry 96' shee that still has the original top end and runs great but i was still concerned about the condition of the top end. I ended up doing a compression check and they read 100 and 101 psi. I know that is low, but I live at 5500' and know that it should read a bit low compared to sea level but how much lower? Is there a correction factor out there to adjust for high altitude or should I just slap a new top end on it? Thanks! im at 5000 and with a stock head 100 is good http://www.nossmachine.com/banshee_heads.htm scroll down almost to the bottom Quote
bikerjon Posted March 31, 2012 Author Report Posted March 31, 2012 im at 5000 and with a stock head 100 is good http://www.nossmachine.com/banshee_heads.htm scroll down almost to the bottom Is that with a pretty fresh top end? Quote
bikerjon Posted March 31, 2012 Author Report Posted March 31, 2012 oops. I didn't click the link before i replied. Thanks! I'm good to go then. Quote
BigRed350x Posted March 31, 2012 Report Posted March 31, 2012 100psi with a stock head at your elevation is pretty good. I'm at 7200ft and with a stock head and ported cylinders I was only getting 90psi. lol Run it! Quote
slothman Posted April 2, 2012 Report Posted April 2, 2012 Make sure your gauge isn't a POS....seriously, I just rebuilt my top end and the gauge was faulty ..... LOL Quote
bikerjon Posted April 2, 2012 Author Report Posted April 2, 2012 its a good guage. Thanks for the help guys. My first one.....and sure is fun. Ill take it over my 450 any day..lol. Still love the 450 though. Quote
sambo13 Posted February 11, 2023 Report Posted February 11, 2023 I know this is an old topic but I have a 2001 Yamaha banshee just rebuilt the top and weighs cool piston board and honed by LA sleeve and I am getting ID PSI on both cylinders I'm at 7200 PSI is that normal some people are saying it is but I don't know doesn't seem right to me Quote
hoppedupandcutdown Posted February 12, 2023 Report Posted February 12, 2023 20 minutes ago, sambo13 said: I know this is an old topic but I have a 2001 Yamaha banshee just rebuilt the top and weighs cool piston board and honed by LA sleeve and I am getting ID PSI on both cylinders I'm at 7200 PSI is that normal some people are saying it is but I don't know doesn't seem right to me I don't know, but I do know Bigred350X above is a smart dude. Quote
sambo13 Posted February 12, 2023 Report Posted February 12, 2023 sorry about the spelling was using that talk tex Quote
sambo13 Posted February 12, 2023 Report Posted February 12, 2023 37 minutes ago, sambo13 said: I know this is an old topic but I have a 2001 Yamaha banshee just rebuilt the top and board and honed by LA sleeve wiseco piston s and I am getting ID PSI on both cylinders I'm at 7200 PSI is that normal some people are saying it is but I don't know doesn't seem right to me Quote
sambo13 Posted February 12, 2023 Report Posted February 12, 2023 (edited) 41 minutes ago, sambo13 said: Edited February 12, 2023 by sambo13 Quote
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