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DT125R FORUM

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  4. Jetting, not the usual.

Jetting, not the usual.

Scheduled Pinned Locked Moved Carburetor
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  • B Offline
    B Offline
    Bodylad
    wrote on last edited by
    #1

    Just curious what everyone’s jetting is at, I’m on standard jets but has a different front pipe and due to the bike I cannot use an airbox.
    I’m thinking I need to upjet quite a bit, revs seem to hang on deceleration and there’s a fairly sizeable bog off idle, and the bike seems to have absolutely no overrun what so ever, falls on its face quite early in the Rev Range. ![0_1557003667249_614C6EE5-531F-4FCA-ABB8-017154AE16C8.png](Uploading 2%) )I’ve not even touched the carb yet to have a play with idle air mixture or needle position.

    Just curious as to people’s starting points really.

    F 1 Reply Last reply
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    • B Bodylad

      Just curious what everyone’s jetting is at, I’m on standard jets but has a different front pipe and due to the bike I cannot use an airbox.
      I’m thinking I need to upjet quite a bit, revs seem to hang on deceleration and there’s a fairly sizeable bog off idle, and the bike seems to have absolutely no overrun what so ever, falls on its face quite early in the Rev Range. ![0_1557003667249_614C6EE5-531F-4FCA-ABB8-017154AE16C8.png](Uploading 2%) )I’ve not even touched the carb yet to have a play with idle air mixture or needle position.

      Just curious as to people’s starting points really.

      F Offline
      F Offline
      frazer.c
      wrote on last edited by frazer.c
      #2

      @Bodylad I’m running 220 main jet 27.5 pilot jet and standard needle position. This is with full dep system, v force reeds & re-bored to the limit of the standard cylinder. Runs very well. Probably a tad rich. Just waiting on my zeeltronic system to arrive next.

      If your experiencing revs not dropping like ‘normal’, I would say your pilot jet could be either blocking up or too small.

      Also I tried running airbox without the snorkel but couldn’t feel any benefits when adjusted. I find the standard airbox setup perfect.

      Hope this helps

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