Relaxinjackson87 Posted June 24, 2014 Report Share Posted June 24, 2014 Hi guys. I am resurrecting by 01 Banshee and I would like to know your opinion about where I should start as far as jetting. I have the following mods: Toomey T5s, K&N air filter, stock air box with lid removed, Athena big bore (392cc). Everything else is stock. Elevation is sea level to 500ft. Temp 60-80 degrees. I rebuilt my carburetors using 30 pilot jets, toomey needle set at 3, and 330 mains. Is this a good starting point or am I going to blow it up? Thanks for your help. Quote Link to comment Share on other sites More sharing options...
toytech Posted June 24, 2014 Report Share Posted June 24, 2014 nobody on here runs the athena kits. but I would say thats probably lean, start with bigger jets and work down. Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted June 24, 2014 Report Share Posted June 24, 2014 Start high always and if its overly sluggish jump down a couple and tune down till its spot on. Your 330 may be spot on but dont start there. Start 370 or higher minimum if you ask me. I would guess with your toomey needles your 330 will be close. Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted June 25, 2014 Report Share Posted June 25, 2014 Pretty big motor for stockers. Your current set up seems pretty close. But I would start at 360/370ish. Better safe then sorry. Quote Link to comment Share on other sites More sharing options...
Russell Wealthall Posted July 5, 2014 Report Share Posted July 5, 2014 One off my sons runs a athena 25 pilot toomeys needle 360 main on his t5 Toomeys high flow foam on stock cage( flows the same as k&n holes in airbox Runs perfect plug colour But tranfers are way to low no bottom end Took 40 thou off the bottom to bring the power on sooner which it did but the transfere then measured 109 degrees to ex 188 Ridiculous raising them up to 128/130 ish Good transfere area good inlet size good tripple port ex Hits really hard but only cause thre ain't no bottom or low mid no matter jetting or timing Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted July 5, 2014 Report Share Posted July 5, 2014 (edited) That pilot is WAY WAY lean for that set up! Try the 27.5 pilots, maybe even a 30 as the motor is a big bore. Put the needle on the second from the bottom clip, and maybe work your main down a size or two. Your main definitely sounds close and you said it's giving the plugs a good color, so try a size down and see what happens Edited July 5, 2014 by trickedcarbine Quote Link to comment Share on other sites More sharing options...
Matt3406 Posted May 29, 2018 Report Share Posted May 29, 2018 @Russell Wealthall Hey I'm no expert on timing or jetting but I'm also putting together an Athena engine and came by your post. I currently have a stock engine in my banshee and for shits and jiggles I wanted to see what retarding the timing did because I have always ridden it with +4. I set it at +2 and there was a world of difference in a bad way. Instead of the crisp transition from low and mid to top end there was a major lag on the low and mid then when it hit the power band it went nuts. With the timing only at +2 the quad has no low end and way to much top end. Ik you said your son is having this problem no matter the timing but I would suggest advancing the timing and seeing if the transition gets any better. Quote Link to comment Share on other sites More sharing options...
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