High powered engines

Discussion in 'Motorized Bicycle General Discussion' started by Robby, May 18, 2012.

  1. Robby

    Robby New Member

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    Hi all. I'm new to this forum but have been searching through it for months. I'm thirsting for good info so decided what better to do than join up!

    I'm planning a build, and decided to buy a single speed urban/MTB bike. Disc brakes a must. I'm considering a Stg 3 motor from 'Rock Solid Engines' as they are an Aussie company. But the more powerful motors out there have cought my attention.

    My big question is has anyone fitted a euro air-cooled pocket bike motor like a BZM 420/620, Polini Elite 14 or similar to a bicycle? I'm trying to work out how it would perform without a gearbox. My quick sums say it will do over 60mph with the most practically attainable 6/80t gearing with a 700c wheel. Would this make it a real pig to ride?

    I have looked at the Dax 50/Morini style motors and the case size makes them "look" really...well.... Illegal.

    I work as a race car engineer (fabricator) so anything is possible for me to make, but I want to be realistic with what I do. Noise is not so much of an issue as I can fab silencers.

    Cheers guys
     
  2. socialdistortionkid

    socialdistortionkid New Member

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    Welcome,
    The BZM or Polini Engine should work in a a bicycle but it would be a tight fit. You would have to custom mount the radiator also. The Dax 50 engine is a clone of a KTM. The Morini engine is from Italy. They are all similar in some ways and should all be very reliable. Find a expansion chamber for your motor.



    Good luck on your build. This forum is very helpful.

    Chad
     
    #2 socialdistortionkid, May 24, 2012
    Last edited: May 24, 2012
  3. Robby

    Robby New Member

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    Thanks for the info Chad.

    I have been looking at the air cooled motors so as to not have to worry about mounting radiators. I also reckon the air cooled pocket bike motors also look like a little bit more like a China girl type motor. I have been researching all different types of motors, from Preditor 99cc, to BZM Micro, to Cags to HT's. I'm really trying to find a powerful motor that could visually pass as a humble "motorized bicycle kit". Time to do it I me thinks!...
     

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