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Thread: 1100 jetting

  1. #1

    1100 jetting

    Hello all, this is my fist post over here. I have just finished building an 1100 b1 and need some help with the carb set-up. The carb set-up I got with the motor was a little corroded & had a stuck jet so I picked up another set & am curious about some of the diffrences & what would be a good place to start. I have read through quite a few of the posts here & couldn't find my answer.
    The carbs that were with it had:
    N/S: 1.2
    M: 107.5/95/107.5
    P: 75/75/75

    The new bank I recieved had the same jetting but 1.5 N/S.

    I have been told to start with the 1.5 N/S and the 107.5 mains all the way across. Would this be a good starting point?
    What springs would be best to start with?
    What pop-off should I be shooting for?

    Thanks,
    Luke


  2. #2
    I guess this should have gone under the old school section, if it needs to be moved please do so. Sorry.

  3. #3
    Moderator OsideBill's Avatar
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    Moved.

    What springs were on the original set-up? I have not tuned an 1100, so I am not too familiar with the set-up. are you running aftermarket F/A's? or stock airbox?

  4. #4
    Bill, they were the stock springs, I'm not sure on the rate. Dull silver if I remember correct. Stock airbox right now & looking for some adapters & filters right now if anyone has some they want to sell.
    Does anyone have a link to the mikuni chart that says what pop-off pressure you get with what N/S & spring rate? Also what pop-off they have found works best?

    Thanks,
    Luke

  5. #5
    pilo704's Avatar
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    hey i got some brand new 1.2 n/s if your interested

  6. #6
    Thanks for the offer, but there is no need to buy anything untill I know the correct jetting & set-up.

  7. #7
    Mpeavler's Avatar
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    Quote Originally Posted by NelsonLt1 View Post
    Thanks for the offer, but there is no need to buy anything untill I know the correct jetting & set-up.
    I put the jetting specs on Pwc...did you get them?

  8. #8
    Yes I did, thanks. What color is the 95g spring?

  9. #9
    QuickMick's Avatar
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    Quote Originally Posted by NelsonLt1 View Post
    Yes I did, thanks. What color is the 95g spring?
    Its dull silver. remember they changed the color of the 115 gram spring to a chrome finish. The new ones are not gold anymore.

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