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Thread: Full exhaust jets and pilot screw settings

  1. #11
    Senior Biker Lane's Avatar
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    You can definitely put them in, they will run better than the stockers that's for sure.

    Your location info would help to try and give a rough guesstimate at the ideal set up, your area and subsequent climate and elevation have a huge influence over the tune.

    Order your jets here: Tyga Performance

  2. #12
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    Well..parts arrived and i am ready for experiments! (i'l try #110-112,2 washers under the needle and pilot screw 2 turns out)
    Meanwhile a new problem appeared..bike is idling a little rough when hot and perfect when cold
    After a research i am suspecting the plug leads..any suggestions?

    upload gif

  3. #13
    Biker Slipry's Avatar
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    suspect its your tune and or an air leak - before you start to change your jetting please ensure your rubber boots and hoses are i great condition to eliminate any running issues, and clean your carbs. recommend you get it running sweet with a good clean and resolve this issue before you play with the jets and exaust. also if that exhaust is from a mc19 and you are fitting it to an mc22 you may need to make a longer hanger for the can OR as i did, bend the join and tig weld it up solid to suit.
    Quote Originally Posted by schultzy View Post
    I stuck a battery up my arse.
    Yeah, that's a cool story...

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  5. #14
    Bik
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    Carb boots and float valves were changed 3months ago, and the carbs were perfectly cleaned and balanced too.Thats why i'm pretty sure its an electrical issue.
    I will change the plug leads first to get the problem fixed and then i will mess with the carbs.
    I havent test fitted the exhaust yet but it was listed as for 250RR so i suppose i wont have a fittment issue.Thanks for the info though!
    Do you think the setup i am planning to do will work with the stock headers and the slip on exhaust too?

  6. #15
    Senior Biker Lane's Avatar
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    Plug leads will NOT fix a hot/cold idle issue! Don not waste your money.

    Cold engines need a rich mixture to run well as cold internal parts causes fuel to condensate on inlet and cylinder walls so mixture is too lean to run, so excessive cold start enrichment helps engine run smoothly.

    Do you use the choke while it is cold? How long do you have the choke on? What are your mixture screws set to now?

    All this will effect your idle mixture.

    My guess it is set a bit rich so benefits a cold engine and runs sloppy while warm.

    When you rev it in neutral while warm does it drop back to idle quickly or do the revs hang and drop slowly?

  7. #16
    Bik
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    I changed the spark leads but i noticed carb 1 and 2 boots didnt have a tight fit (china boots.
    So im putting back the stock ones today and see if it fixes
    The revs didnt hang..no choke were used and my mixture screws were set to 1 and 3/4 out

    These are my plugs as i removed them yesterday


    jpg images

  8. #17
    Bik
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    Problem fixed!
    110 112 jets are in..i put one extra 0.5mm washer to the needles and the mixture screw 2 turns out
    And i also fitted a mallosi double sponge filter in place of the stock paper one

    Throtle responce improved! Bike idles perfectly!
    Still no test drive to check for flat spots
    And still stock headers




  9. #18
    Biker phreak911's Avatar
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    Now put the air box and filter back on it and see if it idles the same... :-)
    Saint by Day... Sinner by Night!

    Quote Originally Posted by banana.logic
    Your mum affects my sag.
    Quote Originally Posted by Matt
    What. the. fuck.

  10. #19
    Bik
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    Went for a test drive today
    Everything ok..i didnt notice any flat spots
    But still idles a little rough when it gets hot.
    Revs drop at 800-1000 when i stop..if i open the throttle 2 times it gets back to normal 1500-1600
    No air leaks!!
    mixture issue??

  11. #20
    Biker phreak911's Avatar
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    Yes. Basically, you've had the setup good in the video, without the air box and filter, but when you put it all back together, it slightly changes the air fuel ratio, because the filter and air box slightly inhibit the flow of air. You will probably find that adjusting the pilot screws a little bit (an eighth to a quarter of a turn at most) will have it running nice again, with the filter and air box in place. You're on the right track though! Don't give up, it definitely sounds good in the video you put up. :-)
    Saint by Day... Sinner by Night!

    Quote Originally Posted by banana.logic
    Your mum affects my sag.
    Quote Originally Posted by Matt
    What. the. fuck.

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