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Discussion Starter · #1 ·
Bought a 2004 660 and was wondering about jetting.
i've been setting up for ice racing, and was wondering if I should be rejetting for the temp. I would imagine that the stock jets are in there as everything else is stock. But today was -6 F with a -25 F windchill, I didn't race but others were. Would I have had to rejet for that temp???
 

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Do you have to, No.

Will it make your bike run better, possibly.

If you start to hear a lot of backfiring, popping, and other noises then I'd certainly rejet. But if the bike runs fine and seems good on power, then I wouldn't worry about it.
 
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