What are the Factory jet kit settings?
The Jet kit is a Factory Supersport PN CRB-Y08-1.0 config. 10. I did not use the supplied pilot jet, but kept the stock one in. J.W. Racepart (201) 773-2484 says the Factory pilot jet will drop the road gas mileage significantly with little power benefit. The needle is a Factory #1170i-90q70rt and the clip was placed 4 grooves down from the top. Five grooves is richest. This clip position may or may not translate to a stock needle position as variations in needle shape dramatically affect the fuel flow for a given needle elevation (clip position). The main jet is a 117.5 Yamaha OEM jet, stock is 112.5. The fuel screws (next to the carb slide covers on the top of the carbs) were set to 3 turns out. Other than that they supplied some nice Allen screws to replace the slide cover screws. So, I would recommend that the cheapskates out there (with slip-ons or aftermarket exhaust) consider trying a set of OEM 117.5 jets, lowering the needle a clip or two, and adjusting your air screw 3 turns
