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I have a 1989 Ski-Doo Formula MX that seems to be running on 1 cylinder. Changed plugs several times with no improvement. Also checked compression.

Left cylinder = 130 psi
Right cylinder = 150 psi

Not sure if these reading are correct but they're substantially different. I also have 2 other Ski-Doo sleds and the compression is approx 125-130 psi. This sled has about 3200 miles on it. Trying to determine course of action. Any help is much appreciated.
 

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Hey I just found your forum haha, is it a duel carb setup because one cylinder might have a clogged jet and is not getting fuel which would result in the one cylinder not running. Greyson
 
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