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Compression on 426?

This is a discussion on Compression on 426? within the 4-Stroke Motorcycles - Yamaha forum, part of the 4-Stroke Motorcycle Forums category; Does anyone know what the compression is supposed to read on the YZ 426?...

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  #1  
Old 12-31-2003, 01:49 PM
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Default Compression on 426?

Does anyone know what the compression is supposed to read on the YZ 426?
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Old 12-31-2003, 02:17 PM
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Default Re: Compression on 426?

If you don't get an answer here, you could probably go over and post at Thumper Talk and ask your question too.
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Old 12-31-2003, 02:54 PM
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Default Re: Compression on 426?

It should be over 175 PSI
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Old 12-31-2003, 04:18 PM
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Default Re: Compression on 426?

I know it's 12.5:1 but not sure what the PSI that woukd be.
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