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2007 Summit 800R XRS compression

xrs 800r summit compression

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#1 907chris



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Posted 10 December 2019 - 01:35 PM

Ok, so I'm getting all my sleds ready for this winter. Got an 2007 ski doo summit xrs 800 I checked the compression 90 psi and 95 psi. I ran the sled until it was up to operating temps and held the throttle at wide open during the test. I guess my question is should i go ahead and do a top rebuild just for preventive maintenance or just run it another year? The elevation here is about 500 ft i had it tested at a shop about 5 years ago and both were at 140 psi. Any help would be appreciated 

#2 Daag44


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Posted 10 December 2019 - 11:09 PM

A couple of things that come to mind like how well it runs and if you have another sled that will show ~140 psi with the same gauge.

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#3 Ski-B


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Posted 13 December 2019 - 07:18 PM

Most of the 07 Summit XRS i have tested are in the 140-145 PSI range. Had one at 95 PSI. It needed a full rebuild. Crank run out was .025" as well.

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1998 Formula S 380. She is a keeper.

#4 800PTEK


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Posted 03 January 2020 - 09:21 PM

For what its worth my 2007 summit had a 130-135 PSI of compression when I bought it. Had 400KM on a BRP long block at the time. A few years later I rebuilt the motor and still had the same compression. Before the rebuild a friend overheated the engine, engine was a pain to start and the electronic reverse didn't work anymore. Compression test showed 90-95PSI.

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