fat tire and gx120 honda 2 hp

Discussion in 'Frame Mounted Engines' started by highstrung74, Dec 13, 2014.

  1. highstrung74

    highstrung74 New Member

    what fat tire bike will this motor fit in and and trans-dapt kit to final drive?
     

  2. Ollie

    Ollie Member

    Hi, do you have a link or pics of the engine?
     
  3. darwin

    darwin Well-Known Member

  4. KCvale

    KCvale Motorized Bicycle Vendor

    A 7G 'Ghost Rider' belt drive and clutch may fit that mount pattern and shaft.

    GX120_LB.jpg
     
  5. highstrung74

    highstrung74 New Member

    sorry my mistake its 4 hp.
    honestly i thought it was 2 hp.
    :rolleyes7:
     
  6. darwin

    darwin Well-Known Member

    Depends on the V in the bike frame if it will fit or not, all bikes are different. The link I posted above click on specs and it gives you the dimensions of the motor to measure with. That motor has a 3/4in straight crank shaft and that won't work with a lot of premade trans that Mabs use which uses a 5/8ths straight shaft. Some folks have hooked up a 212cc HF motor to a trannie so I dunno. Hopefully someone who has experience will chime in to help.
     
  7. KCvale

    KCvale Motorized Bicycle Vendor

    As far as Fat Tire bikes go, the largest center cavity one I have found is the Sun Crusher.

    [​IMG]

    I know it would fit a 49cc 4-stroke with 7G and shift kit, that is a 2-stroke shifter.
    If that 120cc will fit is another story.
     
  8. SunkyWorks

    SunkyWorks Member

    Nice find KC,
    If the 49cc 4-stroke fits, the older (flathead) gx100 and its clone Lifan 97cc (baja minibike) might fit.
     

    Attached Files:

    Last edited: Dec 16, 2014
  9. KCvale

    KCvale Motorized Bicycle Vendor

    It certainly looks promising, and that Sun really was a fun bike to ride.
    We ran the tires at ~20PSI and it felt like riding a full suspension bike, well, almost.

    [​IMG]

    My 'wrench turner' Cole fell in love with it, he'd make excuses to take it for a parts run whenever he could and wanted me to price it too high to sell.
    I did, but it sold anyway, just not before he took it to play around here.

    [​IMG]

    [​IMG]

    Note that chain guard did not come with the bike, it was just something I had laying around but it worked ;-}

    With a 100cc shifter that would be a monster.
     
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