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Old 01-19-2010, 01:05 PM   #1 (permalink)
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compression 440 indy

whats the compression for a 95 indy 440 ??? both are reading 96psi ??

Last edited by chiefer; 01-19-2010 at 01:29 PM.
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Old 01-19-2010, 01:34 PM   #2 (permalink)
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thats fine. its not the number that counts but rather that the numbers are close
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Old 01-19-2010, 01:36 PM   #3 (permalink)
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search the forum... http://www.snowmobileforum.com/yamah...mpression.html many questions have already been answered
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RIP 91 Polaris Indy Trail,
85 Polaris Indy Trail... 488 motor from ^
74 Polaris Colt... custom 440 motor from ^
89 Ski-doo Formula Plus (521)
92 Ski-doo Safari L (377)... still in diagnostics phase

praying for snow and for the packers
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Old 01-19-2010, 02:46 PM   #4 (permalink)
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96 is too low.
Did you do the test properly?
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Old 01-19-2010, 07:41 PM   #5 (permalink)
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ya 96 is low. if you did the test right time for a top end rebuild. did you hold the throttle wide open when you tested? pull it over until the needle stopped climbing?
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