Which TM28 Jet Needles on Daytona 190-4V?

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Which TM28 Jet Needles on Daytona 190-4V?

This is a discussion on Which TM28 Jet Needles on Daytona 190-4V? within the Chinese/Import Minis - General Discussion forums, part of the General Talk category; Are you guys running the stock jet needle (5DP39) on the 190-4V? I bought a used carb that was off an 184 2V and the ...

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    Which TM28 Jet Needles on Daytona 190-4V?

    Are you guys running the stock jet needle (5DP39) on the 190-4V? I bought a used carb that was off an 184 2V and the jetting was pretty good so I ran it last year, but now I'm out for the max. It has a 190 main, #20 pilot and a 5L1 needle in the top groove (meaning one should drop to the next leaner needle). The stock needle is leaner but could it be too lean? It's also a different taper. I'd play around with it more but the needle is a pain to remove on these carbs. So you all running the stock needles and in what clip position?
    SR160-TX (sold)
    P190R
    TTR125LEL
    CB400F (75)

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    Wholesale cycle....38 pilot and needle 46-jfq

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    That's for a keihin carb, my TM28 is a Mikuni.
    SR160-TX (sold)
    P190R
    TTR125LEL
    CB400F (75)

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    based on my research and experience, the stock 5DP39 needle is a 2 stroke needle, 5J6 or 5L1 should work on 4 stroke, at least that's what I'm running with... this applies same to my VM26 carb where I had the stock 5E75 needle and it never ran right until I swapped with a more aggressive needle.

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    I run the stock needle and it runs great. I didn't move the clip up a slot to lean it out a tad

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    Quote Originally Posted by ahwest View Post
    based on my research and experience, the stock 5DP39 needle is a 2 stroke needle, 5J6 or 5L1 should work on 4 stroke, at least that's what I'm running with... this applies same to my VM26 carb where I had the stock 5E75 needle and it never ran right until I swapped with a more aggressive needle.
    That explains a lot, as I was also having trouble with a VM26 on my TTR 150. I think I should try a 5J6 with is a tad leaner than the 5L1 in the TM28. Thanks.
    SR160-TX (sold)
    P190R
    TTR125LEL
    CB400F (75)

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