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Thread: Full exhaust jets and pilot screw settings

  1. #61
    Bik
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    My needles arent worn because the bike was running perfect with the stock exhaust
    I also have a set of needles from a cbr 250RRR and b type carbs.the have different code stamped on them
    But i dont know if they are better or worse

  2. #62
    Senior Biker Lane's Avatar
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    Not sure if I've posted this previously but here it is again:

    https://www.google.com.au/search?q=c...W6IrIb4ECvM%3A

    Use it to pinpoint the area that is affecting your set up.

    Failing this i'm afraid you will need an experienced tuner and a dyno.

    I meant to ask you more than once, what is the area like you are located in, temps, humidity and elevation?

  3. #63
    Bik
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    Humidity is about 60% average ,temperature 25-30 degrees celcius highest elevation 338meters (1109ft) and lowest elevation 70m (230ft)

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  5. #64
    Biker Slipry's Avatar
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    know i have 2 short stacks from when i played around if you want yet another variable - im in South Australia - if you organise a way to get them - they are yours - and i cant recall, but did you try the stock settings, 115 jets, exhaust and factory induction combo?
    Quote Originally Posted by schultzy View Post
    I stuck a battery up my arse.
    Yeah, that's a cool story...

  6. #65
    Bik
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    I tried 115s with closed airbox,filter in place and pilot screw 2 turns out. Started with one washer increased to 2 and finally 3. The flat spot between 5 and 8000 was always there.Adding washers increased the hesitation

    The flat spot only disappeared when I installed the 118s and run no air box.
    With the air box in place it is too rich

    I think I need to figure out a way to fill the mains and the flat spot between 6 and 8000 without adding needle height and keeping the 115 jets and a closed airbox

    Maybe drilling the slide holes and shorten the springs could solve the problem

    I have a spare set to play with..any suggestions? Anybody tried this?

  7. #66
    Junior Biker
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    So we have an update
    After a lot of experiments, i figured out reducing the jet size made the bike work better. So i went back to stock 102.105 jets and the air box diaphragm removed
    The bike works pretty well but is still a bit rich
    I am planning to reduce the jet size to 100-102 soon and put the air box diaphragm back on, so hopefully i will get back some of the mid-low range power
    Here are some pics and video







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