Rejet now, it's like a new bike

Discussion in 'Sportster Models' started by trd865, Jun 1, 2010.

  1. trd865

    trd865 Member

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    I got my 2003 1200C in Oct 09 with 485 miles on it. The guy rode it a couple of time then parked it for six years in his driveway half covered. I took two weeks to change all fluids and clean up the bike. When I did the carb I put in new stock jets, 42 slow and 170 main. The bike seemed fine all winter, but when the warmer weather came it seemed to run hot and lose power. I have put 5000 miles on it since I got it. This past weekend I changed to a 45 slow jet and raised the needle with one washer. It's like a different bike now. It runs smoother and about 20 degrees cooler based on my dip stick thermometer.
     
  2. glider

    glider Veteran Member

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    It's amazing what some additional fuel will do for these bikes as you found out.:s

    Same thing with fuel injection, needs some fuel over the stock setting or downloads.
     
  3. trd865

    trd865 Member

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    What I forgot to mention was it only cost a couple of dollars and can be done in 30 to 45 minutes start to finish.
     
  4. Jack Klarich

    Jack Klarich Expert Member

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    More fuel equals more cooling always better to be a tad rich than lean as the EPA has us too lean to start with:D
     
  5. pike1612

    pike1612 Member

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    When you say one washer-can you give me an idea on the height of the washer?I replaced vacuum piston in mine and replaced the 42 with a 45 trying to eliminate a dead spot in early throttle. I put a washer under the needle and it smoothed the dead spot but transfered it up to be about half throttle? any advice? thanx.
     
  6. glider

    glider Veteran Member

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    Try another washer under the needle. (2 total)
     
  7. NEWHD74FAN

    NEWHD74FAN Experienced Member Retired Moderators

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    Yep, 2 washers following Gliders' Self Help tip when I first discovered this website in 2008, the bike runs great...carburetion is spot on...only use choke to start, push it off, feathering throttle a bit and no dead spots, just pulls with power and torque...eh... "-like a tractor" :D
     
  8. rmarino14

    rmarino14 Member

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    Yep, lean might be meaner but it will eventually destroy the engine. I bought my bike last year from my brother-in-law and it had drag pipes, stock air filter, and was not re-jetted when I got it. Re-jetted the bike and threw a new air filter in and the bike rides like new. It was running too lean and VERY hot.
     
  9. pike1612

    pike1612 Member

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    I done as you instructed-ran out like a champ-come home put the kickstand down and low and behold-fuel coming out the overflow tube...MY ORIGINAL ISSUE LOL! Will i ever come to an end on this?
     
  10. glider

    glider Veteran Member

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    Float level too high or possibly something stuck in the needle and seat.