maskmanLS6 Posted August 1, 2012 Report Share Posted August 1, 2012 Im switching from stock carbs with 30 pilots and 330 mains with alba needles in the middle clip. Im going with a set of 34mm mikuni carbs and would like an idea on what jets i should start with, I have a stock stroke ,stock cylinder with a dune port. I have my timing set at +4 and have 155 psi compression. Any advice would be great, I know the main jet size will actually be smaller which i dont understand but im not sure how much smaller. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted August 1, 2012 Report Share Posted August 1, 2012 Those carbs will come out of the box with a 280 main, 5fp17 needle, 389q2 needle jet and 50 pilots. Start with the 280 mains, move the needle to the 4th clip and put in a set of 40 pilots in. That should get you close, tune from there. You may want to go to a 389q0 jet needle and/or run the needle in the leanest clip. Quote Link to comment Share on other sites More sharing options...
maskmanLS6 Posted August 1, 2012 Author Report Share Posted August 1, 2012 Those carbs will come out of the box with a 280 main, 5fp17 needle, 389q2 needle jet and 50 pilots. Start with the 280 mains, move the needle to the 4th clip and put in a set of 40 pilots in. That should get you close, tune from there. You may want to go to a 389q0 jet needle and/or run the needle in the leanest clip. Im gonna tear them down tomorrow to see whats in them,,,Im not sure if the jetting is stock. Ill post what they have and get some more advice tomorrow. Thanks alot for your help and i hope to get your opinion again after i see whats in them. Quote Link to comment Share on other sites More sharing options...
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