2 stroke carb on HS engine

Discussion in '4-Stroke Engines' started by dougsr.874, Jun 21, 2015.

  1. dougsr.874

    dougsr.874 Active Member

    I read on Facebook where the standard NT carb is a great replacement for the HS carb.....poster says it eliminates the idling problems and works
    extremely welll..........Any thoughts on this matter???

  2. KCvale

    KCvale Motorized Bicycle Vendor

    Yes an NT carb will work, you need an NT intake as well, I find the Z offset intakes work best.



    You'll want to put a catch can on your bike to put the crankcase vent tube in.
    I ran one into the air cleaner and it ran terrible with the NT.
  3. dougsr.874

    dougsr.874 Active Member

    Where is the best place to buy the offset intakes?????????????
  4. jaguar

    jaguar Well-Known Member

  5. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

  6. KCvale

    KCvale Motorized Bicycle Vendor

    One of my NT 4-strokes had an intake that guy made, worked well.

    Not sure which exact Z bolted right on, I have a drawer with a few and Cole cut/welded a couple from various parts.
    The NT is not an upgrade, it is just an alternative and personally I think the 49's run better with the stock carb, when they work that is.

    I really can't sell a bike with the emissions removed but I'd bet those carbs work much better if you put the crankcase vent hose into a catch can or something and not into the carb, the vent kills an NT.
    Last edited: Jun 22, 2015
  7. darwin

    darwin Well-Known Member

    Saw where a poster used a mikuni pumper carb on a HS 142f and his claims were substantial in performance. I'm trying to find that site/post but no luck so far. Of course Mikuni and Keihin are Japanese carbs for motorcycles since the 50s.
  8. The_Aleman

    The_Aleman Active Member

    My brother has a cammed GXH50 and has been battling carb problems for the last 2 years, not long after switching to a "reworked" Huasheng carb sold by a vendor.

    He just installed the VMB intake and NT carb, works like a charm! I'll probably switch my Huasheng, too.
  9. nujaxx

    nujaxx New Member


    thats a super nice build.

    what would you charge for one of these?
  10. KCvale

    KCvale Motorized Bicycle Vendor

    As long as you open up the exhaust and drop an NGK plug in I can see any good carb like a Mikuni or even the Delorto clone being an actual performance advantage.

    I'll bet even more of an improvement on a 144F-1G 53cc.
    I have a pair of new 144's just sitting here waiting to be used.

    Thank you but the wrong topic.
    That builds topic is here http://www.motoredbikes.com/showthread.php?45381-Fito-3-66cc-3-speed-shifter-w-shocks
    Well, that one was $1,400 delivered intact and ready to ride with a full tank of gas 230 miles away.
    I have a new truck and un-employed son for just such deliveries ;-}