Compression testing


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Ban-one
New Member & Happy To Be Here
New Member & Happy To Be Here
Posts: 5
Joined: Tue May 03, 2016 8:48 pm
Location: New York
Location: New York

Compression testing

Post by Ban-one »

I have started my project. To get my Dads old CBX running again. It has been not run in 20 years now. I have done a compression test. The results were dismal at best. 70psi to a max of 80psi across the board. I do remember the bike running great before it was parked. So my question is. I have read a good psi number can be between 130 to 170. Does this sound right???? The manual " if I'm reading it correctly". Says 170 psi. Any help with this would be a great help to me moving forward with this project.

daves79x
ICOA Technical Director
ICOA Technical Director
Posts: 4738
Joined: Sun Oct 01, 2006 8:05 am
Location: Knox, PA
Location: Knox, PA

Re: Compression testing

Post by daves79x »

To do an accurate compression test, you have to run the bike and warm it up. For a bike that has sat for 20 years, that's not bad stone cold. I wouldn't worry about that just yet. Get the carbs done and then address the issue. Jack is OK, there are possibly some better options. PM me if you want a more detailed explanation.

Dave

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