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bigger pilot jet?

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the dude at the local dirt bike shop told me my bike would run cooler and have more power if i went bigger on the pilot jet. bike is a stock 07 crf450r. The bike is barely broke in. guy only did 2 oil changes to it lol..

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Dude at the bike shop is clueless.

 

Pilot jet size is Dependant on fuel screw setting which is dependent on a perfect idle with a hot engine. It will not 'cool off your engine'. Do not let your bike sit and idle and keep the speed up. You must have air going through the radiators to keep the bike cool.

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