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Project My project MC22

Discussion in 'Your 250cc Projects' started by Krompot, May 21, 2020.

  1. jmw76

    jmw76 Well-Known Member

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    oh. sorry about that.
     
  2. Krompot

    Krompot Well-Known Member Premium Member

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    No need to apologize, I appreciate your help!
     
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  3. Krompot

    Krompot Well-Known Member Premium Member

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    [​IMG]

    size 35 (left) vs size 35S (right)

    The old carbs (with seized pilot screw + clogged pilot circuit) had 35S slow jets.

    cleaned and swapped them over... bike runs perfectly, needs 1/8 turn out on the pilot screws I think, it's a little lean at idle.

    This is (hopefully) the end of this thread. Thanks to everyone for all their help and patience.
    ...now I polish the fairings :D
     
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  4. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    Seems like you are always better to use the original brass... there have been plenty of Carby issues with Keyster sets that when returned to original brass they all go away.
    At least you have it resolved now... enjoy it :)
     
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  5. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Hey Krompot, well done. Were they Keyster kits you bought or Chinese jobbies?
    So the 35S from your old carbs is what you fitted and your bike is an 'L' model?
     
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  6. Krompot

    Krompot Well-Known Member Premium Member

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    Short story long;
    I bought a set of MC22 carbs from a wrecker, but #3 carb on this set had a clogged pilot circuit and I couldn't get it clean.
    then, I bought a set of 'MC19' carbs from a wrecker (These were actually mc22 carbs (VP20A) that were on an MC19 bike) so I bought an MC19 carb kit (I ordered the kit before I'd received the carbs) from Xcite and was gonna jerry-rig something together (Silly, I know, but I was desperate. No one in NZ had 'working' MC22 carbs, only MC19.)

    I used the pilot screw o-rings from the kits but nothing else and reassembled the carbs. This is where my issues started.
    Decided to swap all the brass bits from the carb set I knew worked (with the seized pilot screw + clogged circuit) and saw the huge difference in slow jet size. I then compared them to the slow jets in the kit I bought and they were the same, so I used the brand new slow jets from the kit.
    I should have clarified that ^^ when I said 'swapped them over', didn't want to drown you lot in a wall of text haha.
    Happy to report that the kit I bought from Xcite has correct jet sizes :p

    If you scroll back, you'll see a post where I said I put working carbs on and the issue persisted (firing on 3 cylinders), (this is because the second set of carbs I bought *also* had a clogged #3 carb pilot circuit.) The seller sold the carbs as known working condition to me.

    Naivety, impatience, and a whole lot of bad luck has made this project much harder and frustrating than it needed to be.
     
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