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
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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