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I am helping a friend with his XCR 600 SP. The carbs have what I feel is odd main jets installed. Mag is 350, center is 360 and PTO is 340. Stock according to Ronnies on line Fiche is 400. Can some one tell me what jets they are using? We are at 500 to 1000 ft above. Thanks.
 

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Staggering jets on 2 strokes sleds is common, staggering them on PWC is almost guaranteed. It is due to a number of factors including which cylinders run cooler due to distance from water pump, different case volumes from water/oil pumps, etc.

Bryan
 
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