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Thread: Sputtering

  1. #1
    Join Date
    Nov 2008


    When I am running at mostly a constant speed at 40mph-80mph I occasionally her a a "psst cha" with some surging.
    I recently changed out my box filter to a chrome spike air filter. i ran into an issue that had the tip of the spike resting on the highway bars. I adjusted the bracket that the spike came with and solved the problem, but it tilted the carb up. I also placed 2 shims on on the needle for carb adjustement. i have been folling with the A/F screw with minimal success of the problem.
    Hyothesis: I think it may be a vaccum leak due to the tilted carb. I may need to fine tune the A/F screw.

  2. #2
    Charlie D's Avatar
    Charlie D is offline Senior Member
    Washington State Riders Group
    Oregon Riders Group
    Join Date
    Aug 2006
    seatac, Washington
    nope, if you got the band clamp tight you should be good, what you have is a need for 1 more shim.

    better yet a 205 or 210 main jet from factory pro and 1 or 2 shims would be a better set up while you are at it a 58 pilot would help too with the A/F set to around 2 turns open.

  3. #3
    Join Date
    Nov 2008
    so, you think i should go from 2 shims to 3? I will try that 1st. changing the jet i have heard mixed postings but will try that as well if it doesn't work. Also, I wanted to point out that the bracket that holds the carb i placed an additional 3/8 thick bolt to tweek the tip of the chrome spike and has put some good tension on the litfting the carb a little beyond normal position upward. thanks for your advice.

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