[QuarterBoreNinja]

YEAR: 2009

INTAKE MODIFICATIONS: Airbox removed, K&N-0990 w/ stock intake runners

EXHAUST MODIFICATIONS: Area-P standard length CF full system, kleen air system removed

JET KIT OR STOCK? Jet Kit

BRAND OF JET KIT? Factory Pro 3.0

MAIN JET: 110

Pilot Jet: 38

NEEDLE AND CLIP POSITION: 4

MIXTURE SCREW SETTINGS: 3.0

ELEVATION: 770 feet

MISCELLANEOUS INFORMATION ABOUT YOUR BIKE’S JETTING SETUP: Began with the 112.5 main, pulled well. Tried the 110 and oh yea, that's the ticket! Pulled ever stronger to redline.

Began with the clip in the 3rd position on the needle but had surging at higher RPM's with small throttle openings. Moved clip to the 4th position, surging eliminated and bike pulled much better in the 5k to 8k range.

Idle circuit was a bit of a challenge, the Factory Pro supplied 40 pilot jet had the idle circuit very rich. Very boggy until 5k or so. Idle was impossible to set and bike would stall if the throttle was touched. Float height was within spec but to lean out the circuit enough the air/fuel mixture screws needed to be at .75, still very soft, no power in the low RPM range, idle still dropping below the set point. Returned to the stock 38 pilot jet, set the mixture screws to 2.5 and eventually settled on a mixture setting of 3.0. Idle is solid, low RPM steady state cruise smooth, bike will take full throttle at 3k in 2nd gear cleanly.

The carburetor slides were each drilled with a #70 drill bit, the throttle response was improved especially during rev-matching downshifting...