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TOPIC: Compression PSI
#136975
jvcexc (User)
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Gender: Male Location: St. Joseph, Mo Birthdate: 1946-12-22
Compression PSI 3 Years, 6 Months ago  
Just curious. I haven't even checked my personal Roadstar, but I was curious if anyone knows what the factory psi compression is for a stock 1700.

John
 
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Cougar (User)
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Re:Compression PSI 3 Years, 6 Months ago  
I think stock is around 170 p.s.i. Coug
 
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#136996
DocShadow (Admin)
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Re:Compression PSI 3 Years, 6 Months ago  
That's correct 142 -199 psi and the difference between the cylinders should less than 10%

Doc
 
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jvcexc (User)
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Re:Compression PSI 3 Years, 6 Months ago  
Thanks Coug,and Doc

I have a bud with a 1500 Suzuki that was having some probs. His compression on both cylinders with the compression release disconnected was only 90 psi. I suspect valves. I squirted oil in the cylinders and checked again with no increase. Didn't have a book, but though it had to have at least 145 to run right.

Thanks, John

Doc beat me on the reply
 
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Last Edit: 2008/11/07 16:11 By jvcexc.
 



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Re:Compression PSI 3 Years, 6 Months ago  
Yes ... you need to make sure the decompression release is not functional.

A leakdown test would give you a better idea. I believe I've seen instructions for a home-made setup on the Internet.

Doc
 
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jvcexc (User)
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Re:Compression PSI 3 Years, 6 Months ago  
Thanks Doc,
I have a leak down set-up at the shop. We just checked it here at home and haven't had a chance to get it in yet.

John
 
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