212cc Predator Engine Gear Ratio

Discussion in 'Introduce Yourself' started by mattp98, Mar 14, 2014.

  1. mattp98

    mattp98 New Member

    Joined:
    Mar 11, 2014
    Messages:
    3
    Likes Received:
    0
    Hey Guys im new to this forum and I am building a beach cruiser with a 212cc predator engine (governor removed). I was wondering what gear ratio with a jackshaft kit would get me around 45 to 50mph and still have enough power to start from a stop and make it up hills.
     
  2. Danny Pate

    Danny Pate New Member

    Joined:
    Feb 11, 2014
    Messages:
    3
    Likes Received:
    0
    zpt hey i got a 212cc predator with a jackshaft but i am running a cvt torque converter set-up but i am also shifting gears on the other side ...thats makes things way more complicated......i would start out with a 10 thooth on motor to 14 on jackshaft then 10 tooth to 50 on rear should put you in the ball park http://www.youtube.com/watch?v=CzEgWnnBMcs
     
  3. paul

    paul Active Member

    Joined:
    Dec 23, 2007
    Messages:
    5,536
    Likes Received:
    10
    hi matt and welcome. that will be one fast motorized bicycle. I am not familiar with the 212cc engine but I am sure a few members are and will be glad to share their experience, great to have you with us
     
  4. culvercityclassic

    culvercityclassic Well-Known Member

    Joined:
    Sep 27, 2009
    Messages:
    3,089
    Likes Received:
    59
    This will do it: 13-22-9-50. Don't waste your money on a cheap clutch, you must purchase a quality one so it will take off smooth.
     
  5. racie35

    racie35 Active Member

    Joined:
    Nov 17, 2012
    Messages:
    1,700
    Likes Received:
    1
    Like cc says and the tav will make it easy if you go that route. Otherwise buy a good clutch.
     
  6. mattp98

    mattp98 New Member

    Joined:
    Mar 11, 2014
    Messages:
    3
    Likes Received:
    0
    Alright thanks for the info guys!! and what clutch would you recommend for a smooth take off?
     
  7. Danny Pate

    Danny Pate New Member

    Joined:
    Feb 11, 2014
    Messages:
    3
    Likes Received:
    0
    I bought a Comet i have had no problems with it at all....but i am new to the bike building seen ...... I have almost 500 miles on it now
     
  8. Manic Mechanic

    Manic Mechanic New Member

    Joined:
    Mar 30, 2014
    Messages:
    7
    Likes Received:
    0
    Hello Matt,
    I have a beach cruiser myself. It tops out at 44mph. It is all in the gearing, the least amount of teeth on your sprocket the higher your top end will be. A 25 or 27 teeth sprocket should get you there, but your low end will be terrible. I burn up clutches monthly on my 66cc two stroke. Just the price I pay for a fast bike. Best of luck ... Jeff
     

Share This Page