OC-SHEE Posted April 4, 2004 Report Share Posted April 4, 2004 Ok just wondering if anyone else had the setup. This a brand new top end. I have a 172 in the carb now down from the 180 they supplied. Its still rich because when i remove the plugs after a lil running it looks like unburnt oil on the plugs. I dono if i should leave it this way till brake in is over or should i go down to a 170 and lean it out with the needle. Also could my pilot be too big? I have no bottom rev its bogs when i blip the gas. Any help would be appreciated as I intend to be at the track this week and race this weekend. Thanks-JOE Quote Link to comment Share on other sites More sharing options...
sredish Posted April 5, 2004 Report Share Posted April 5, 2004 What size is the carb, what pilot are you running, and what's the needle postion? Also, how is your airbox/air filter setup? What's your elevation? Quote Link to comment Share on other sites More sharing options...
brimstone92 Posted April 5, 2004 Report Share Posted April 5, 2004 dynoport 2 into 1, cv2 35mm, 195 main, 45 pilot, k&n with box(no lid), 100 to 200 feet elev. what is the plug color? after 6th WO ? the excess oil could just be too high a ratio of premix? just my 2 cents, anyone else ? Quote Link to comment Share on other sites More sharing options...
BrokeStonedBiker Posted April 6, 2004 Report Share Posted April 6, 2004 its bogs when i blip the gas does blip mean when your at idel and feather the gas it will hesitate a bit and then take off? well just add more air to it if that dont work add more fuel. but id say more oxogen Quote Link to comment Share on other sites More sharing options...
OC-SHEE Posted April 7, 2004 Author Report Share Posted April 7, 2004 well i sat for a whole nother day playing with the damn thing on monday so now its either going to speed freeks or my friends shop to be tuned. Im done after spending more then 70 bux on jets and still runs like shit. By the way now i have a 165 main in and a 42 pilot with the needle in the middle and the air fuel 1 from closed. Still doing the same shit. So now i give up because i need this done. Quote Link to comment Share on other sites More sharing options...
Fireman-hott Posted April 7, 2004 Report Share Posted April 7, 2004 if its a keihin, I'm running a 180main. my pilot is too big at 50 though. my air screw is about 2 turns out give/take a half turn. Mine still bogs on the low end, but also loads up when it idles for awhile, hence the too big pilot. Quote Link to comment Share on other sites More sharing options...
OC-SHEE Posted April 7, 2004 Author Report Share Posted April 7, 2004 then maybe i really need to go lower on my pilot even though im at a 42. Well ill be bringing it to be tuned cuz im sick of playing with it. Quote Link to comment Share on other sites More sharing options...
PUSH THE THROTTLE Posted April 8, 2004 Report Share Posted April 8, 2004 Check the Duncan Racing website, this really explains the keihin carb. http://www.duncanracing.com/techfaq/Tech_k...n-jetting.phtml I run a 35mm CV2 with DMC 916's 52 pilot and 195 main, running 16-40 gearing and can't keep the front down. Riding in Iowa not sure of elevation numbers. Quote Link to comment Share on other sites More sharing options...
GONRIDIN Posted April 8, 2004 Report Share Posted April 8, 2004 Has the motor been ported. If so, some port jobs can have a "hesitation" on the low end caused from improper port timing. Some carbs make the hesitation worse than others. For example a Mikuni has better low end adjustments than a Kehin so you can generally tune through the bog better. Not saying this is the problem, just something to check. You may need to go to a different needle to help the transision between the pilot and the needle. Good luck! Quote Link to comment Share on other sites More sharing options...
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