Airhead Mikuni Owners Thread

Discussion in 'Airheads' started by Uncle Pollo, Oct 2, 2012.

  1. rheritage

    rheritage Been here awhile

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    Already have the Mikuni 32 kit installed on my 72 R/75, love'em. Now I'm thinking of a set of 36's for my newly acquired 78 100RS 40mm exhaust, I did not see that size available at Rocky Point. I might just call them to see if they can make me up a kit, I agree their cables are great, you can really fine tune them.
    #21
  2. wolfy317

    wolfy317 Addicted to BMW

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    I was under the impression that Bill, or was that Stan, had sold Rocky Point... I may have to check them out after all! Really looking forward to getting these del'lorto's off my machine!!!

    Oh, and quick question, I assume there is no left side / right side orientation on the carbs, so are adjustments hard to make on one side vs. the other?
    #22
  3. oldroadie

    oldroadie Two wheel addict

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    My Rocky Point kit is left and right. The hard one to get to is the left side air mix screw which is necessarily in the same location in the carb body and doesn't transpose.

    I'm still struggling a tiny bit with the choke cables but the throttle set is spot on.
    #23
  4. hardwaregrrl

    hardwaregrrl ignore list

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    My Tm's are not left, right oriented. But I don't believe Bill sells the TMs, just the VM's. And yes, Stan sold the operation to Bill who is just as big a carburetor nerd as Stan. Loves to help you tune them over the phone, and hear results!!!
    #24
  5. wolfy317

    wolfy317 Addicted to BMW

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    Thanks :)
    #25
  6. wolfy317

    wolfy317 Addicted to BMW

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    Sent an email in to rocky point and got a reply from bill! He's gonna help me get a setup for my r75 with r90s cylinders and heads :).


    Sent from my iPhone using Tapatalk
    #26
  7. Kt-88

    Kt-88 I like everything.

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    I went ahead and emailed too. The Bings are just clapped out.
    #27
  8. Uncle Pollo

    Uncle Pollo Long timer

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    140's and 02's now with 6f4 "even" needle.

    i will try a leaner jet needle and see.

    runs very smooth and less burbling at the bottom.
    #28
  9. supershaft

    supershaft because I can

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    Please try to include your slide angle. When starting from scratch. It makes ALL the difference. Same with needle jets.
    #29
  10. Kt-88

    Kt-88 I like everything.

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    I committed. I'll be running vm32s on the r90/6 as soon as they arrive.

    I'd like to keep the stock air filter and box setup so that will require some creative engineering. I'll post what size components are in the carbs as well as how it goes when all is assembled. I'm sure I won't get it right at first.
    #30
  11. supershaft

    supershaft because I can

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    Why is everyone running such small carbs. They run a lot better with bigger carbs IMO. 900's and 1000's? Choose between 36 and 38mm. Concerned about bottom end power? I know it sounds counter intuitive but 38mm Mikuni's OR dells have way more low end response than 32mm Bings. I have made the swap many times and I usually feel a bigger increase in performance in the lower revs versus higher up. Use larger Mikuni's and compared to Bings have it better on the bottom AND top. When it comes to carbs, you can have your cake AND eat it too!
    #31
  12. Kt-88

    Kt-88 I like everything.

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    Mostly because I already own the 32's. I thought they were 34s and I'm a little saddened, but that's ok.
    #32
  13. hardwaregrrl

    hardwaregrrl ignore list

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    My main reason was and still is, economy. I wanted a little more punch off the line without suffering reduced mpgs. I have been able to achieve on average 1-2 more mpgs with the 32TMs then the Bings. Noticeable difference on acceleration, I don't need anything more than that right now.
    #33
  14. oldroadie

    oldroadie Two wheel addict

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    Simple, I'm just a rider, not a racer. A smooth running bike with good power is all I need.
    #34
  15. oldroadie

    oldroadie Two wheel addict

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    Dude! Focus on the thread. Post the model, exhaust, altitude and mikuni jetting information from your bike and quit telling me how to set up my bike.
    #35
  16. supershaft

    supershaft because I can

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    Man dude, I thought I was giving good advise, not telling you what to do and I thought it was in the spirit of this thread since it is a lot more so far that just listing jet sizes. Oh well, I don't care. I'll go back up and erase it.
    #36
  17. Kt-88

    Kt-88 I like everything.

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    Opened my carbs up today. Here's what's in them at the moment.

    Slide is a 3.0
    Needle is a 6DH7
    Main is a 190
    Pilot is a 35
    Needle Jet is 159 P-5

    Bill from Rocky Point says that will be rich especially at 4400 feet. I dropped the needle to the uppermost setting and screwed in the mix to one turn out. When the cables get here we will see!
    #37
  18. oldroadie

    oldroadie Two wheel addict

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    I'm at 900 ft and that would be too rich for me. I'm At a 180 main with 25 pilots now and it's still a little rich, I'll be trying some 170 mains next.
    #38
  19. Kt-88

    Kt-88 I like everything.

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    I wonder how much of a difference 150cc makes? I'm willing to bet not as much as 3000ft. I wonder how much effect dropping the needles will have?
    #39
  20. Uncle Pollo

    Uncle Pollo Long timer

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    I am at 5k feet. Sounds waay too rich
    #40