batshee Posted August 22, 2008 Report Posted August 22, 2008 first would like to say hi all. i recently bought a 1989 banshee its not my first banshee so am not that lost with the shee's well this bike was barely even running when i got it,took the carbs off and it had a 200 main on one side and a 220 main on the other side(the guy was a complete jack ass ) the pilots are stock on both,i need some help on where to start and what jets should i be using along with what pilots should be right for the following mod's THANKS GUYS! miami - sea level 60-90F uni foam pods fmf gold series power core silencers stock porting stock carbs stock reeds and cages stock timing tors is still on there!! Quote
mdhc500 Posted August 22, 2008 Report Posted August 22, 2008 Try... 240's or 250's on the mains Stock Pilot Needle on the 3rd Airscrews out 1.5 Do a plug chop and go from there... This "Should" be close to start... Good luck... Quote
elwilliams13 Posted August 22, 2008 Report Posted August 22, 2008 I had a similar set up and live close to you. I ran a 260main needle slot 3 and a 27.5 pilot. Ran good with no bog. Quote
mdhc500 Posted August 22, 2008 Report Posted August 22, 2008 I had a similar set up and live close to you. I ran a 260main needle slot 3 and a 27.5 pilot. Ran good with no bog. I was gonna say 260's but with that elevation heat and humidity I wasnt sure if 260 might be to fat... You will be real close with these numbers dude... Quote
batshee Posted August 22, 2008 Author Report Posted August 22, 2008 MAN! you guys are DAMN GOOD !!! will try it and let you guys know how it does... Quote
mopar1rules Posted August 23, 2008 Report Posted August 23, 2008 i would start a little fatter like 300-280 and then go down from there. Quote
batshee Posted August 26, 2008 Author Report Posted August 26, 2008 Hey guys i re-jetted the bike i put 280 mains and left the stock pilots now aim not sure on the air screw position i dont really understand whats a full turn and a half turn(but i belive it's right the way i adjusted it. ) .the problem am having is that the bike is turning off when i hit the gas in first gear it just bogs dead i can kinda ride it wehen i rev it really high and ride the cluth to get it not to bogg,but still will turn off as soon as i shift to second .can it be the air screw position if so can some one darw me a lil diagram on the air srew position like 1/4 1/2 and full thanks alot by the way the bike sounds way better and idles well Quote
mdhc500 Posted August 26, 2008 Report Posted August 26, 2008 (edited) Hey guys i re-jetted the bike i put 280 mains and left the stock pilots now aim not sure on the air screw position i dont really understand whats a full turn and a half turn(but i belive it's right the way i adjusted it. ) .the problem am having is that the bike is turning off when i hit the gas in first gear it just bogs dead i can kinda ride it wehen i rev it really high and ride the cluth to get it not to bogg,but still will turn off as soon as i shift to second .can it be the air screw position if so can some one darw me a lil diagram on the air srew position like 1/4 1/2 and full thanks alot by the way the bike sounds way better and idles well I still think that 280's might be a hair fat, but I'm no expert. The airscrews are as follows... Turn them all the way in (Clockwise) but do not torque them to tight. You are using a straight blade screwdriver so pretend the recessed part of the screw is the hand of a clock. Once screwed all the way in if the hand is on 2 o'clock, then one full turn out (counter-clockwise) would be back at 2 o'clock. 1.5 would be counter-clockwise back to 2, then past to 8 o'clock. Does this help. The correct number of turns out may be 1 turn, 1.25 turns, etc... Just make sure both screws are out the same amount. NOTE one carb might be at 2 o'clock fully seated, and the other may be at 4 o'clock... The idle/air screw's control idle speed, and off idle throttle response... Good luck and report back... Edited August 26, 2008 by mdhc500 Quote
batshee Posted August 26, 2008 Author Report Posted August 26, 2008 I still think that 280's might be a hair fat, but I'm no expert. The airscrews are as follows... Turn them all the way in (Clockwise) but do not torque them to tight. You are using a straight blade screwdriver so pretend the recessed part of the screw is the hand of a clock. Once screwed all the way in if the hand is on 2 o'clock, then one full turn out (counter-clockwise) would be back at 2 o'clock. 1.5 would be counter-clockwise back to 2, then past to 8 o'clock. Does this help. The correct number of turns out may be 1 turn, 1.25 turns, etc... Just make sure both screws are out the same amount. NOTE one carb might be at 2 o'clock fully seated, and the other may be at 4 o'clock... The idle/air screw's control idle speed, and off idle throttle response... Good luck and report back... but would this be part of the problem on why the bike shuts dowm as soon as i let off the clutch Quote
mopar1rules Posted August 26, 2008 Report Posted August 26, 2008 you need to put in at least 27.5 pilots. change the pilots to 27.5 and the mains to 310 and report back. Quote
mdhc500 Posted August 26, 2008 Report Posted August 26, 2008 you need to put in at least 27.5 pilots. change the pilots to 27.5 and the mains to 310 and report back. You want him to go fatter? Lets get his bike running first, then worry about the mains... You should also be fine with the stock needles. I honestly dont think his bike is modded that heavily. Quote
mdhc500 Posted August 26, 2008 Report Posted August 26, 2008 but would this be part of the problem on why the bike shuts dowm as soon as i let off the clutch Is is bogging/spitting/sputtering then shuting off, or is it BOOM it shuts off? Are you giving it fuel and riding the clutch out? Please be a bit more descriptive. Also how does it act in nuetral? Can you rev it up, etc... Quote
Hilarious Posted August 26, 2008 Report Posted August 26, 2008 are the carbs in sync? first off make sure they are in sync. start off, needle on middle clip, 25 (stock) pilot, 320 mains, air screws 2 turns from lightly seated. When i had fattys on my bike, i used a 340 main and it hit pretty hard. set one jetting circuit at a time. Get it idling and do a plug chop to see where you are on your mains then go from there. Quote
mopar1rules Posted August 26, 2008 Report Posted August 26, 2008 You want him to go fatter? yes, fattys seem to like the 27.5 pilots. mine is currently running 30 pilots, but i'll soon be trying 32.5's. he has pod filters, which are getting more air into the engine and he has fatty pipes. thats good enough for me to say, you need at least 27.5 pilots and like 300-320 mains. leave the needles alone and put the air screws at 2 turns out from lightly seated/closed. do this and report back. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.