Senior VR Member
Join Date: Jan 2010
Location: Vandergrift, Pa
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Jet setting question
i have honest abed pipes and plan on added my k&n this winter. i've already re-jetted (i cant remember off the top of my head what i used) and used a dyno jet kit. obviously i will know what i used previously once i tear down the bike.
here is my question. from the rejet matrix on this website is reccomends:
Aftermarket or stock pipes (baffles or debaffled) & Uni filter or K&N (airbox mounted):
150 or 155 main, 37.5 pilot jet, dyno spring, dyno needle on 3rd notch, mix screw at 2.5 - 3 turns. Adjust idle knob as needed to reach 1100 rpm.
From the dynojet instructions, it states to only replace the main with a 150 or 155 and no mention of the pilot jet. However it does say to turn the mix screw out to 3.5 turns.
what is the difference in replacing that pilot jet or not replacing it? Dynojet doesn't seem to think it is necessary, i don't recall what size the factory pilot jet is. what is the benefit to replacing the pilot jet like suggested in the rejetting matrix as opposed to leaving it alone as in the dynojet instructions? Does turning out the fuel mixture 3.5 turns vs. the 2.5-3 make up for not replacing the pilot jet?
Last edited by danteisme; 12-19-2012 at 01:29 PM.
Reason: added more info.