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What do you guys recommend for Main Jets and Needle settings on the 03's? Just got one and the plugs look black as night. I have also heard that the fuel milage will get much better if jetted down. Just want to know what is safe? Thanks
 

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Stock is 380, with the needle set to the lowest point. the 500ss (old 600) runs 360s, and the 800 runs a 400 main jet (this is for the Michigan area). If you could get a 370 main jet it may help, but if you run too lean you'll be looking for a motor in the spring.

You could most likely drop down one jet size
 
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