MasterBlaster Posted May 22, 2010 Report Share Posted May 22, 2010 ok i have a 2005 yamaha banshee..I have fmf gold series fatty exhaust with gutted power core 2 silencers....right now i ams running 260 mains and i think 27.5 piolets....I used to have 270 mains but it never idled...it idles with the 260s but it is not pulling in 5 and 6th gear...im pretty sure it running lean....i was hopeing someone that know there stuff could tell me what size mains and piolets i should be running for it to run great....if any one could help me that would be great...thanks....oh and my altitude is sealevel to 10ft where i sometimes ride but where i live and usually ride it is 23 to 25 ft....thanks Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted May 22, 2010 Report Share Posted May 22, 2010 The main doesn't affect the idle. The pilot jets, and air mixture screws do. Quote Link to comment Share on other sites More sharing options...
GrMeyer Posted May 23, 2010 Report Share Posted May 23, 2010 Are you running the lid? Starting point With lid 270 Without 290 Depending on temp. If your in the 50's then bump up the mains one from what I said. Remember this is a starting point. http://www.dfn.com/benkaren/jetfaq.html Read up on this site. FYI throttle The air screw is most effective between idle through 1/8 throttle. The pilot jet is most effective between 1/8 through 1/4 throttle. The jet needle is most effective between 1/4 through 3/4 throttle. The main jet is most effective between 3/4 through wide-open throttle. Quote Link to comment Share on other sites More sharing options...
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