how do i start

Discussion in 'Motorized Bicycle General Discussion' started by da soul, Sep 1, 2008.

  1. da soul

    da soul New Member

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    hi wats up i am thinking of geting myself a motor for my bike, should i go for the 60 cc?how much speed can i get?
     
  2. surfmatt

    surfmatt New Member

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    i was going to ask the same question, only im going for the 80cc (apparently) may aswell!
     
  3. paul

    paul Active Member

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    the larger engine will not give you more speed. the larger engine was designed for power to pull things and also nice for us larger riders. speed is around the same for both motors which is 25-35 mph average. like any other motor thier is modifications you can do to get more speed however 30mph is plenty quick on a motorized bicycle for most of us.
     
  4. deacon

    deacon minor bike philosopher

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    Heck twenty is more than enough for me.... And by the way the 60 70 and 80 are in effect the same size engine. My opinion not shared by everyone is go for the least expensive in that size range if you want one. Don't pay any attention to the size.
     
  5. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Before you think speed, think reliability. Good way to get hurt or killed.

    Out of the box all the HT engines are about the same, a 49cc will indeed spin up faster because all the engines essentially use the same size carb and exhaust. However if you listen and learn or have someone do it for you, a 67cc can be modified to be much faster than a 49cc.

    I have a 67cc, that I have modified and added the shifter kit to. 39.7 mph and I wasn't in a tuck.
     
  6. da soul

    da soul New Member

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    thanx for the info.another thing thats bugin me is how to stop the bike? what braking systems do u guys use?
     
  7. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Suicidal coaster brake.

    I would suggest adding a front brake to one if you don't already have it.
     
  8. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    I would say the most common failure during the 3 day PNW MB rally were exploding coaster hubs. The only way I would have a coaster brake is with pull brakes front and rear.
     
  9. OSCAR383

    OSCAR383 New Member

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    i have a dual pull brake leaver that pulls the front caliper brake and rear caliper at the same time . beets draggin you shoe
     
  10. Saddletramp1200

    Saddletramp1200 Custom MB Buiilder

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    Ah, brakes. 70% of your stopping comes from the front brake. v pull cantalever, center pull all the same! Disc won't lock. Sometimes. How you ride is Important! Don't over ride your bike! My brake pads are so old they have dentures. BUT they work. Brake ajustment is everything! 2.ten millionths of a second don't matter after you get hit by the car!
     
  11. Nomad

    Nomad New Member

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    What caused explosion of the coaster hubs?
     
  12. da soul

    da soul New Member

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    You guys are great help!! thanx.whats the fuel consuption of a 70cc?
     
  13. lennyharp

    lennyharp New Member

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    Repeted hard braking with a coaster brake will burn the grease and gum it up. You definately need to coast speed down and use less brake and repack the grease often.
     
  14. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Speed and mass and lots of riding.
     
  15. street rider

    street rider New Member

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    i have a three wheeler i got out of the garbage and the back axle was snaped. i fixed it and once again it snaped going around a corner (when turning a sharp corner one wheel spins one way and the other spins the other way)...how can i fix that ??
    also i am trying to mount a 47cc chain saw engine. but i also want the pedal crank to still work .. two chains for the crank so it's not so tence and belt for the chain saw motor
     
  16. Hitekrdnk

    Hitekrdnk New Member

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    How do you stop?

    If you look up the history of the Whizzer their biggest fault back in the late 40's was the fact that they could go but stopping power being dependent on the coaster brake was not very reliable. It didn't stop them selling close to 200,000 units back then though.
     
  17. da soul

    da soul New Member

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    Hi street rider why dont you try having the axle wellded by a profesional some times the welding equipment determines the strength of the joint, and you can mount two sprokets on the axle so that you get the kick that you wanted.
     
  18. lennyharp

    lennyharp New Member

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    There are differentials some 3 wheelers come with and maybe you need one as the solution to breaking axles?
     
  19. Saddletramp1200

    Saddletramp1200 Custom MB Buiilder

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    I was told by a local bike dealer that Schwinn still makes three wheel bikes.
    Might check around your area for parts. As for the fuel milage on a 70cc it really depends how you ride, hills,wind, your weight, ect.
     
  20. amealnet

    amealnet New Member

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    iam considering buying a motor kit from ebay, i would like to know how the rear drive sprocket attaches to the rear wheel and is the overall installation difficult?
     

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