Large seat tube.

Discussion in 'Motorized Bicycle General Discussion' started by Ursus, Mar 4, 2011.

  1. Ursus

    Ursus New Member

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    I,m currently mounting a raw motors 80cc to a gary fischer MTB. The seatpost tube is very thick and the down tube is even thicker. Would i get away with using an exhaust u clamp on both tubes? I just want to make sure the engines foundation will be strong.
     
  2. joabthebugman

    joabthebugman New Member

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    I am building mine on a similarly thick frame
    Even the seat post needs a large frame adapter

    the front tube needed one of Sick Bikes adapters, which does use an exhaust pipe clamp

    It would b easy to use an exhaust clamp only by simply drilling holes to match the mounting studs and then using either the supplied U bolt , if it will fit, or a larger version of the clamp that comes in the kits
    http://www.custommotoredbicycles.com/yahoo_site_admin/assets/images/IMG_1200.28784829_std.jpg

    Because my frame is aluminum i wanted as much mounting surface as possible so I substituted one of those clamps and used two bolts to mount Sick's mount
     
  3. joabthebugman

    joabthebugman New Member

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  4. Ursus

    Ursus New Member

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    is that for both front and rear mounts??
     
  5. joabthebugman

    joabthebugman New Member

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    I used that set up for the large seat post
    It would work on the typical large front tube on most new cruisers

    For the back I substituted that clamp for the exhaust pipe clamp u bolt in the Sick Bike mount

    Sick Bike Parts

    You could also just drill the clamp part to fit the engine mounts and use the clamp on the back side instead of buying the motor mount

    I hope you uinderstand that, I'm not good at explaining these things
     
    #5 joabthebugman, Mar 4, 2011
    Last edited: Mar 4, 2011
  6. Mac

    Mac New Member

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