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WONDER IF ANYONE OUT THERE COULD RECOMEND WHAT SIZE MAINS THEY ARE RUNNING IN AN 05 600 XC AND ALSO AN 06 600 FUSION HO.
 

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WONDER IF ANYONE OUT THERE COULD RECOMEND WHAT SIZE MAINS THEY ARE RUNNING IN AN 05 600 XC AND ALSO AN 06 600 FUSION HO.[/b]
The 05 600 came with 440 stock main jets and most other 600's to date came with 420 stock main jets, including the 06 600 HO. The 05 600 is a very fast sled when properly setup like the 2000 600 was. Polaris must have used a hotter box on the 05 and tweaked the motor. I always drop 2 sizes on every sled I have ever owned and have never had a problem. I had a 2006 Dragon 600 HO and ran 400 mains with a gutted air box with no problems, but I always ran premium fuel. The 06 600 HO has DET control so in theory, if it runs lean, the DET should take over. I would run 420's in the 05 and 400's in the 06.
 
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