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View Full Version : K&N Airfilter Jetting PLEASE HELP!



dunerunner25
02-24-2008, 11:06 PM
OK, does anybody have a K&N on their ATC 70? And if so what is your MAIN JET??
I went to glamis this weekend and tried out a 62 main...It was better when it warmed up but it still sputtered mid range and had a dead spot. I was using the choke to lean it out. No one has small enough jets around here unless you order them. This mod is starting to get expensive and I am about ready to ditch the filter. Can anyone please help!!!:confused:

the.all.new.shaun
03-06-2008, 07:24 AM
have done the same thing and i'm having the same problems. sorry im a bit new to all this so i need to get a bigger mainjet to give more fuel, then this balance out the extra air? and it'll run sweet

the.all.new.shaun
03-13-2008, 09:01 AM
ok i've managed to get mine running sweet without even replacing the original jets. i removed the vacum slide and fuel needle. then removed the fuel needle from the slide and moved the C clip to the bottom of the 5 grooves. then i added a 3-4 mm spacer under the C clip when i put the needle back in, but if you have replaced the jets and its getting close to running well you might just get away with moving the C clip. if this make no sense i'll send you a link to a video which will help.