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  1. #1
    Policeman's Avatar
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    Explaining Keihin Carb tuning to a 10 year old.... Accept the Challenge!

    Ok, So I managed to install an engine in my 2003 Polaris Virage. I can pretty much get through any R&R throughout much of the ski - EXCEPT figuring out how to properly tune the carb to the engine. So can some one talk to me like I'm 10 on how to properly tune the carb?

    Thanks in advance!

    Brad


  2. #2
    Read the tuning section of the Mikuni SBN manual- about 5 times. Then read it 5 more times when you're ready to start tuning... Same ideas and principles apply to the Keihins...

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  4. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Is this the stock carburetor from this engine, or removed from some other engine?

  5. #4
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    carb is already tuned for your setup,sounds like you have an issue to find,set to all stock specs then describe what it does or doesn't do

  6. #5
    Policeman's Avatar
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    It is the stock carb on a reman engine. Idles rough unless you use the choke. Then there is a catch up period when it actually gets power. Carb kit was put in and ran great on the prior engine. I know it's just needing tuned to the engine but hard to find anything much on this specific carb. I really can't afford to take it to somewhere so it's just sitting for now until I get educated.

    Thanks!

  7. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Policeman View Post
    It is the stock carb on a reman engine. Idles rough unless you use the choke. Then there is a catch up period when it actually gets power.

    Carb kit was put in and ran great on the prior engine.

    I know it's just needing tuned to the engine but hard to find anything much on this specific carb. I really can't afford to take it to somewhere so it's just sitting for now until I get educated.

    Thanks!
    Have you verified the rebuilt engine is indeed correct? Cylinder compression, correct flywheel timing? Intake reeds good?

    Also correct fuel hose routing. Sometimes an incorrect fuel hose or pulse hose connection can create oddball effects.

  8. #7
    Policeman's Avatar
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    I am fairly certain that the fuel lines are correct but got to thinking about the timing. Could I have messed that up putting it back together? Its on a 700 engine and it seemed pretty straight forward. I just figured it was the carb.

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