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18th September 2007
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Flat Track Racer
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Join Date: Aug 2007
Posts: 211 Sportster/Buell Model: 1200 converted RatRod-RIP Sportster/Buell Year: 2002 Other Motorcycle Model: HD FXDB Other Motorcycle Year: 2007
Reputation: 100
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missfire/studder?
i have noticed that at steady rpms, not high, but more than idle under load that my engine studders slightly and sounds as if its missfiring on a cylinder. doesnt happen when i give it a fair amount of gas just when im in say 3rd gear at 30 mph and holding steady. anyone have experience with this?
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18th September 2007
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XL FORUM TEAM MEMBER
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Join Date: Nov 2004
Location: cordova, tn
Posts: 12,633 Sportster/Buell Model: xl1218rr turbo Sportster/Buell Year: 1993
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What kind of carb and air cleaner are you using? Have you rejetted and put in a dyno jet kit.
__________________
Spoiled but definitely not rotten. Started life as a black 1993, 1200 Now-1218, Home ported 2009 FI heads, SE 551 cams, Aerocharger variable vane turbo. Dyna2Ki, JMC aluminum swingarm, Chainsikle custom mid forward controls, GBC inverted front end, 3 degree wide-glide trees and 5 degree raked cups. 18x5.5 fatspoke rear with 150/60 and 21x3.5 with 120/70. 
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18th September 2007
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Flat Track Racer
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Join Date: Aug 2007
Posts: 211 Sportster/Buell Model: 1200 converted RatRod-RIP Sportster/Buell Year: 2002 Other Motorcycle Model: HD FXDB Other Motorcycle Year: 2007
Reputation: 100
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its a cv and yes its rejetted with 45/165 i think. and the ac is kinda like a small "big sucker"
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18th September 2007
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Flat Track Racer
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Join Date: Aug 2007
Posts: 211 Sportster/Buell Model: 1200 converted RatRod-RIP Sportster/Buell Year: 2002 Other Motorcycle Model: HD FXDB Other Motorcycle Year: 2007
Reputation: 100
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would the voes have anything to do with that? maybe an intake leak?
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18th September 2007
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XL FORUM TEAM MEMBER
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Join Date: Nov 2006
Location: North America
Posts: 1,196 Sportster/Buell Model: 1200S Sportster/Buell Year: 2002 Sportster/Buell Model #2: XR-1000 Sportster/Buell Year #2: 1984
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needle adjustment
Sounds like you need to adjust the needle to get a slightly richer mixture. It's probally going lean on you during the transition from pilot to main jet. Assuming the needle is stock and has not been modified.
__________________
Jesse 
2002 XL1200S "The Black Beauty" NRHS 1250 kit CI, NRHS Stage 1 TS heads dual plugged, NRHS Hurricane Air Filter, SE 536 cams, Rich Products Thunder header, 42 Mikuni, Daytona Twin Tec ignition w/ Dyna coils. 97.4 HP, 85.5 Torque 1984 XR-1000 S&S Crank/rods w/windage tray, Vision Grinding Cylinders, Arias 11:1 compression pistons, Andrews XR-1000-1 cams, Baisley modified dual plugged heads, Rich Products Thunder header, 38mm Delortos, Daytona Twin Tec ignition w/ Dyna coils. (the never ending project but, got a 66 Barracuda drag car sucking up all the funds and time)
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