45mph at ~7600rpms

Discussion in 'Motorized Bicycle General Discussion' started by k.mah, Jan 18, 2013.

  1. kerwin50

    kerwin50 New Member

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    Well I've been really looking and researching everything. It almost seems better in the long run to use the shift kit to begin with rather than the headaches of the rag mount and sprocket adaptors as well as the chain tensioner.
    I know being a newbie I should start out more simple but I have a lot of experts here to guide me along.

    Speaking of model airplane engines. I fly gassers. We still like to keep our rpm down in the 6 and 7 thou mark.
    We have the same issues with the cheaper china engines as the MB'ers have.
    Another thing is a MB engine is designed for a side thrust load. Where as an airplane engine is made for a pulling type load. I think on my DLE 30 you'd snap the mounting lugs and case decause of it's cantilever crank. http://www.towerhobbies.com/products/dle_engines/dleg0031.html
    Now a zenoah G62's crank can handle a side load I don't know about the mounting. I do know the G62 is abaout as strong as your going to get
    http://www.horizonhobby.com/products/super-cub-dsm-rtf-ZENE62A
    Of course you can pick these motors up in good used condition for around 250 http://www.horizonhobby.com/products/super-cub-dsm-rtf-ZENE62A
     

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  2. robin

    robin Member

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    I wondered where you get those charts ?
     
  3. biknut

    biknut Active Member

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  4. kerwin50

    kerwin50 New Member

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    It really seems that a shift kit will help the 2 stroke motor out.
    I had been leaning towards a 4 stroke, but if I can get a 2 stroke to do the work and be fairly dependable I may go that route.
    I can understand the cost of the shift kit but I'm really thinking that way.
    I know I would hate boggy take off's and limited speed.
    Will a shift kit fit a frame with a 1 piece crank?
     
  5. k.mah

    k.mah New Member

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    I wish i had a shift kit at this point. My goal is 50mph with the single speed.
    I fabricated a yz80 pipe up to the bike and re jetted the carb. TORQUE IS INSANE! As for top speed increase...not sure yet. I hit 46 on my speedometer going down the street, but it now pulls up a 15-16% grade (checked on mapmyride) at 37mph!
    Im finally accepting I probably won't hit 50mph, til i switch out the 36t sprocket for a 32t, then its game on again.
     

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