Quick question about carb and exhaust.

Discussion in '2-Stroke Engines' started by Oddzball, May 12, 2011.

  1. Oddzball

    Oddzball Member

    Does the 48 cc and the 66cc use the same carb and exhaust or are they differrent?

  2. Oddzball

    Oddzball Member

    And with that in mind would it be relatively easy to just buy a new grubee 66cc GT5 slant head motor and drop it in with my existing kit? Assuming i have a 48cc motor. (Which im not 100% sure on)
  3. adrian101

    adrian101 Member

    Hey Oddzball,

    If it is the stock NT carby and muffler/exhaust then yeah they pretty much all come the same. 49cc and 66cc basically come with the same stock parts unless they throw in an added extra like a CNS carby for the 66cc kit or something like that...

    With that in mind you can change over to a grubee 66cc GT5 slant head engine with no problems at all.
  4. motorpsycho

    motorpsycho Active Member

    well, not all 48 c.c. h.t. engine use the same intake/carb set up as the 66 c.c.'s.
    my 48 c.c. does not have an intake tube. the carb bolts directly to the cylinder and it is a totally different style of n.t. carb than what comes on the 66 c.c. engines.
    the exhaust is the same on both engines tho.

    here's the carb on my 48 c.c. 2 stroke. see. no intake tube and a different flange on the end of the carb where it bolts to the cylinder.

    Here's the carb on my 66 c.c. 2 stroke. typical tube intake manifold and n.t. carb.
  5. Oddzball

    Oddzball Member

    Ok my motor looks like the second picture. Except no slant plug

    I assume the chain size and placement is the same correct?

    Mounts look to be the same.

    So if the time comes it looks pretty painless.
  6. motorpsycho

    motorpsycho Active Member

    yes the chain size and placement is the same.
    the only real difference between the 48 cc, and the 66 cc is the bore and piston size. (besides the 48 c.c.'s with the different carb and no intake tube)
    exernally they are almost identical. the cylinder on the 48 c.c. may be slightly smaller externally, but if the 48 c.c. cylinder is smaller, it's not by very much.
  7. adrian101

    adrian101 Member

    Where did you get that exhaust from in the first picture. If it any good?
  8. motorpsycho

    motorpsycho Active Member

    The expansion chamber in my first pic. is from spooky tooth (but i don't think they are in business anymore).
    Yes it works good but i mad a 5" extension pipe at the end, and put on a stock muffler that i modified for better flow.