I don't remember the jet size right now and the bike is outside + its dark. I just tap it sometimes when I'm flat out with the literboys just to spool it up. I have been known to run ridiculously tall gearing....sometimes making 6th almost useless unless I tap it, have a long hill, draft another slow bike, stay tucked WOT for miles and find "good air" at certain parts of the hwy. People say I'm crazy around here for doing it...the motor does sound worse these days and I do valve adjustements every 2k miles because I'm at such high RPMS all the time w/this bike. Cheap bike to experiment with...a scaled down primitive ZX12 in a way. Chin down on the tank, WOT it actually reminds me of the 12 in a weird way...maybe its the gauges, or the intake tone.