Frame Size??

Discussion in 'Motorized Bicycle General Discussion' started by scab101, Jun 9, 2011.

  1. scab101

    scab101 New Member

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    I am new to mb's and I am wanting to build my first bike, and i have been looking at motors ect. but i cant seem to find anything on the frame size required. I have a 19" frame and was wondering if a motor would fit??
    I was also wondering if it is worth buying a jackshaft kit aswell??
    any help would be appreciated Thanks :)
     
  2. benutne

    benutne New Member

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    Do what I did. Grab a caliper from a friend or go out and buy one. Then measure your tubes (Seat post, down tube, and cross tube). Its likely your bike will work just fine. If you have an oversized bike like mine (1.75" down tube) then SPB sells a mount to help with that.
     
  3. Santa_cruz_loc

    Santa_cruz_loc New Member

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    You want to have at least 15" of clearance from your peddles to your top bar. The width of your tubes are not as important, there is plenty of after market mounts available.
     
  4. Santa_cruz_loc

    Santa_cruz_loc New Member

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    As for the shift kit, I doubt one would fit on a 19" frame so don't waste your money. You need at least 2.5" of space between the seat post and back tire.
     
  5. scab101

    scab101 New Member

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    cheers for the help :)
     
  6. dag_29307

    dag_29307 New Member

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    When you say a 19" frame are you talking about using a 20" BMX style frame? What bike frame are you using? it would help us to give you answers if we knew a little more about what you are working with. The more information you present us the more accurate the answers can be. I'm not trying to be a wise a$$ just trying to help. I know for a fact that there are a few 20" BMX frames that a motor will fit in; With a little tweaking. I'll post pics of mine soon.
     
  7. vincent713

    vincent713 New Member

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    My Raleigh C30 has a 19' frame and it has over 2' of open space all around the carb and cylinder.
     

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