x1 or x2 pocket bike transmission

Discussion in 'Motorized Bicycle General Discussion' started by stuch, Feb 4, 2012.

  1. stuch

    stuch New Member

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    will a x1 or x2 transmission fit on a honda gxh50 i was thinking of turning the motor around and running the transmission directly to the front chain ring; fitted with a free wheel. in theory it will eliminate the need for a jack shaft. has any one done this.
     
  2. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    My 2-stroke Tanaka is fitted with that pocket bike transmission, and runs thru the front chainring. It is an EXCELLENT combination. Many 2-strokes and some 4-strokes could be fitted the same way. However, the vendor supplying the center-framed mounts is no longer in business. Thatsdax.com USED to have their own center-frame mounts, but it's no longer on its website.

    Besides, the Honda 50 must be retrofitted with a special adaptor and bellhousing, for it to run on any 78mm engine drive assemblies. This is available only from one vendor, and costs about $120. This cost is in addition to the engine drive assemblies.
     
  3. stuch

    stuch New Member

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    thanks for the reply i know i can make the adapter and the mount do you think the gearing might be right 11 tooth trans 44 tooth chain ring 30 tooth drive on to 26 tooth low gear and a 14 tooth high [ 6 speed ] and who would the vendor be
     
    #3 stuch, Feb 5, 2012
    Last edited: Feb 5, 2012
  4. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    Your best bet would be to gear the bike very low. First, 2nd and 3rd gear will act as granny gear and work well at low speeds.

    With 11t/44t, that's 4:1. Pocket bike gearboxes are 5:1, so that's 20:1.

    With an 14t-26t rear cassette and a 30t front chainring, final gearing ranges
    from a weak 17.33:1 to a lackluster 9.33:1 In fact, only the first four gears in the cassette might be usable.

    In retrospect, my 7th gear is 17.72:1, which I use as a "pulling" highway gear.

    If you used a 48t front engine chainring, six gear might be usable @ 10.18:1.

    FWIW, I use an 11t chained to a 72t 8mm chainring. using a 24t front bicycle chainring, my first gear is a VERY low 46.36:1, while 8th gear is very usable @ 15:1. Granted, I use a high-winding Tanaka 47R engine, so low gears get used well.xct2
     
  5. stuch

    stuch New Member

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    thanks for the reply so what trans do you think is the best x1 or x2 and will it be to wide for sbp bottom bracket
     
  6. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    I use the generic 5:1 pocket bike gearbox. The X1 & X2 use this same tranny.
     
    #6 5-7HEAVEN, Feb 5, 2012
    Last edited: Feb 5, 2012
  7. stuch

    stuch New Member

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    who makes the clutch adapteor
     
  8. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    Staton-inc.com
     

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