anabule Posted November 15, 2009 Report Share Posted November 15, 2009 i have a 1997 banshee that is mainly stock other than fmf fatty gold series high rev cdi 4+ degrees and vitos forged piston kit carbon reeds i recently go a really good deal on some 34mm pjs well i was wondering if it was possible for me to change the pilot main and the jet needle clip cause it runs really bad thanks for the help Quote Link to comment Share on other sites More sharing options...
ELKARACING_SHEE Posted November 15, 2009 Report Share Posted November 15, 2009 i have a 1997 banshee that is mainly stock other than fmf fatty gold series high rev cdi 4+ degrees and vitos forged piston kit carbon reeds i recently go a really good deal on some 34mm pjs well i was wondering if it was possible for me to change the pilot main and the jet needle clip cause it runs really bad thanks for the help your basicly feeding more juice to a stock motor, in order to feel some power, you have to port it and stuff, in order for those carbs to do their job. im sure you can change the pilot and the main jet to your liking, but you wont feel much power as if you would if its ported, Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted November 15, 2009 Report Share Posted November 15, 2009 What is your current jetting? Main Pilot What needles What clip position Pilot jet Air screw turns out? Quote Link to comment Share on other sites More sharing options...
anabule Posted November 15, 2009 Author Report Share Posted November 15, 2009 im not really sure they told me they were set up for the 404 big bore ill have to check on the rest but they came with 160 165 and 170 mains i ordered them from vitos ill go check and get back with you Quote Link to comment Share on other sites More sharing options...
anabule Posted November 15, 2009 Author Report Share Posted November 15, 2009 yeah the pilot jet is a 55 the main is a 170 the needle is a 60 and i cant figure out how to tell what clip position and its 1.5 turns out Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted November 15, 2009 Report Share Posted November 15, 2009 Your way over jetted. For mains you should be in the 152-160 range. When I was running PJ's they liked a little richer pilot than my pwk's. I would try a #50 pilot. The needles should have 3 letters on them. Like a CEL or CEK, or CGL. There is about 30 different needles keihin makes for them. The needles will have 5 or 6 groves on the blunt end. An E clip goes in one grove. It raises or lowers the needle in the slide. The leanest setting is #1 wich has the needle lowered clear down. It would be in the top grove. Quote Link to comment Share on other sites More sharing options...
gst_r Posted November 15, 2009 Report Share Posted November 15, 2009 Just to give you an idea, my mods are: - Drag/Full port - Ported Cases - Stock reeds - +4 timing - Milled head and at sea level on my 34 PJ i am running 160 mains, clip on the last clip (richest position), 55 pilots (maybe running too rich)..... maybe this help you.... Quote Link to comment Share on other sites More sharing options...
anabule Posted November 15, 2009 Author Report Share Posted November 15, 2009 (edited) alright man finally figured out how to get the needle out of the cutaway never done that before it is in the third one down from the top thats really rich isnt it and it is a cgl i might have to replace the needle too im just tryin to figure this out so i guess ill try a 50 slo jet and a 160 main could i just move the needle all the way down and get away with the 55 pilot or what and what about the air mixture screw thats the one by the air filter i think and coul this have caused my idle problems too Edited November 15, 2009 by anabule Quote Link to comment Share on other sites More sharing options...
crustydemon Posted November 15, 2009 Report Share Posted November 15, 2009 alright man finally figured out how to get the needle out of the cutaway never done that before it is in the third one down from the top thats really rich isnt it and it is a cgl i might have to replace the needle too im just tryin to figure this out so i guess ill try a 50 slo jet and a 160 main could i just move the needle all the way down and get away with the 55 pilot or what and what about the air mixture screw thats the one by the air filter i think and coul this have caused my idle problems too Before you buy new needles I would try a 48 pilot with those needles on the bottom clip (richest position)with your air screws out 1 1/2 turns and see if that gets you anywhere.Try it with the 160 mains. We shouldnt say anything until we know your elevation though. Quote Link to comment Share on other sites More sharing options...
anabule Posted November 15, 2009 Author Report Share Posted November 15, 2009 my elevation is 748 ft above sea level it seems like it would still be to rich like that but i will def give it a try im probably gonna get the jets off vitos performance unless there is a better place to get em Quote Link to comment Share on other sites More sharing options...
crustydemon Posted November 16, 2009 Report Share Posted November 16, 2009 Well I could certainly be wrong considering I cant get mine jetted right either. Quote Link to comment Share on other sites More sharing options...
anabule Posted November 16, 2009 Author Report Share Posted November 16, 2009 yeah its defenitly a real pain i just want to be able to ride it the way it is now it barely runs Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted November 16, 2009 Report Share Posted November 16, 2009 I would start out with a 158 main, and a 50 or 48 pilot jet. Dont run the needles at extreem settings to try to make up for having the wong pilot jet. All that does is cause midrange problems with a better pilot circuit. You can get it close just guessing. After you get it running ok you need to start at the top and work your way down. Starting with the main. Go out for a WOT run see how it feels. It can caugh and spudder getting there but once your at wot you want a clean running machine. After you get the main dialed in then work on the needle. If you end up at the richest needle clip position (all the way at the bottom #5) then you need to swap the needles out for a shorter needle. (CEL). Then reset the clip position to the middle and re tune. After you get the needle sorted out then tune the pilot circuit. This way you dont have a mis adjusted needle to compensate for to large or small of a main, and so you dont have the wrong size of a pilot jet to compensate for a miss adjusted needle. Here is a great keihin jetting guide. Study it well. http://www.duncanracing.com/TechCenter/KeihinCarbJetting.pdf Quote Link to comment Share on other sites More sharing options...
anabule Posted November 16, 2009 Author Report Share Posted November 16, 2009 alright ill give it a shot thanks alot so ill get a 160 main and a 48 pilot and go from there what should i start the air screws at and the needle position Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted November 17, 2009 Report Share Posted November 17, 2009 alright ill give it a shot thanks alot so ill get a 160 main and a 48 pilot and go from there what should i start the air screws at and the needle position I would start out with the air scews 2 turns out. Needle in the middle clip position. If you end up with the air scews under 1 turn out then you need to go up a pilot jet size and reset the air scews at 2 turns out. If you end up at over 3 turns out then you need to go down a pilot jet size. Think of it this way. The pilot jet and air scew work together. Changing the pilot jet is a coarse adjustment. Then you fine tune it with the air scew. Quote Link to comment Share on other sites More sharing options...
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