RILS Posted October 12, 2009 Report Posted October 12, 2009 Do you know what mains are currently in the carbs? Wichita is around 1300 ft ASL so the jetting will need to be a little leaner than average for SL. I would start no leaner than 330 just to be on the safe side. Its easy to jet down but not so easy to redo that fresh topend. I agree with everything said here I would think in the end you will proably end up around 300 on the main but I would start around 330 or 340 and dont go jacking up the timing untill you get it jetted right. Quote
AKheathen Posted October 13, 2009 Report Posted October 13, 2009 you unplugged the tors controll module, right?. no carb wires=no idle. with the 27.5's, idle screws@ 1.75 turns from touching the slides bottomed out by slacking the cables untill they bottom, and airscrews @ 1.5 turns from seated, it should pop off and idle pretty close, if not a little high. if not, pull the plugs and see if they're getting fuel. yoou could have a plugged pilot jet, too. you could be missing the choke tube, which is the little piece of vaccuume line that connects the 2 carbs together. check that the slides are in right by pushing the throttle all the way and the dots should line up in the little windows. run through this list and she should be purring like a kitten within the hour. if not, clean them better, removing the jets and blowing compressed air through all the passages, and install the 330 mains while you're in there. remember to final tune it with the motor warmed up. i can tell you that running pipes that are too big might make you leaner than usuall on the mains, too, so be prepared to go even higher, but that should at least get you on the dyno Quote
KickStartMyHeart Posted October 13, 2009 Author Report Posted October 13, 2009 you unplugged the tors controll module, right?. no carb wires=no idle. with the 27.5's, idle screws@ 1.75 turns from touching the slides bottomed out by slacking the cables untill they bottom, and airscrews @ 1.5 turns from seated, it should pop off and idle pretty close, if not a little high. if not, pull the plugs and see if they're getting fuel. yoou could have a plugged pilot jet, too. you could be missing the choke tube, which is the little piece of vaccuume line that connects the 2 carbs together. check that the slides are in right by pushing the throttle all the way and the dots should line up in the little windows. run through this list and she should be purring like a kitten within the hour. if not, clean them better, removing the jets and blowing compressed air through all the passages, and install the 330 mains while you're in there. remember to final tune it with the motor warmed up. i can tell you that running pipes that are too big might make you leaner than usuall on the mains, too, so be prepared to go even higher, but that should at least get you on the dyno LOL!! they forgot to unplug the TORS control module! So, when we unplugged it, and set all the idle screws, it idled just fine! LOL, jesus what a deal! 2morrow morning it goes on the dyno. Nmotion put bigger jets in after the first run on the dyno prior to the TORS and CPI's due to it being super lean. I believe they put 27.5 pilots in it to start at, but didn't touch the main jets yet. Any guesses on what the jetting will be 2morrow??? I have no clue on the main jets, but I'm guessing 29.0's for the pilots. Any guesses on HP?....With a smoked clutch, it made 50 hp and SUPER lean with t-6's. Quote
Sammy Posted October 13, 2009 Report Posted October 13, 2009 Im guessing the jetting will end up around 330 MJ/27.50 PJ/3rd clip NJ. I would not even strap it down without knowing what mains are in the carbs. That one pull under load could ruin your build. Better safe than sorry if you ask me. As for the pilot jets they only come it steps of 2.5. So 27.50-30.00-32.50. Good luck.... Quote
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