03 450r wont idle and backfires
  • prolxstang89
    Posts: 2
    Joined: Sun Mar 29, 2009 11:30 am

    03 450r wont idle and backfires

    by prolxstang89 » Sun Mar 29, 2009 12:02 pm

    hi guys i just picked up a 03 450r from a buddy after he couldnt get it to idle. Its really hard to get started. Once i get it started it will only run with the choke on. As soon i pull the choke off it dies. Someone else already pulled the carb off and cleaned it. I was told that he removed every thing to clean it including the TPS. I went out and got a Honda service manual but its a 2002 the guys at the honda derler said it will work.

    What is the right ohms setting for the 03?

    I recleaned the carb and set all the settings back to stock.

    the honda book saids that the ohms should increases when the throttle is opened. is that right?


    thanks tom
  • norfox
    Posts: 4
    Joined: Sat Mar 21, 2009 11:34 am

    by norfox » Sun Mar 29, 2009 9:04 pm

    I would check the valve clearances and clean the air filter before doing anything else to the carb.
  • Asmith
    Posts: 14381
    Joined: Mon Apr 10, 2006 7:52 am

    Re: 03 450r wont idle and backfires

    by Asmith » Sun Mar 29, 2009 9:22 pm

    prolxstang89 wrote: Once i get it started it will only run with the choke on. As soon i pull the choke off it dies.


    Pilot jet is clogged. Remove it and clean thoroughly or better yet replace it with a new 45 pilot jet.
  • prolxstang89
    Posts: 2
    Joined: Sun Mar 29, 2009 11:30 am

    by prolxstang89 » Mon Mar 30, 2009 8:19 am

    thanks guys i did clean the carb and readjusted the pilot jet. It runs great

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