Top Speed

Discussion in 'Performance Mods' started by Snarfu, Jul 8, 2012.

  1. Tony01

    Tony01 Member

    Yeah sure; 70mph on a stock 212. How you measuring that with GPS? Tire sensor? What circumference do you have set in your bicycle computer? What's your gear ratio?

    Sounds like bullshit to me..

    Just like that bullshit about the 100mph whizzer
     

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  2. zippinaround

    zippinaround Active Member

    Very informative altogether! Why bother posting your speed without mentioning how you achieved it ?
     
  3. skyash

    skyash Active Member

    Can eny be make sense of this like how many hp/kw/Watt ? I know the top speed and distance that's about it lol
     

    Attached Files:

    zippinaround likes this.
  4. Street Ryderz

    Street Ryderz Well-Known Member

    the peak wattage says 1496 but it doesnt show the voltage so my guess is between 3-4 hp.
     
  5. zippinaround

    zippinaround Active Member

    1 mechanical horsepower = 745.7 watts
     
  6. skyash

    skyash Active Member

    Sweet I see . 2.06 hp thanks guys
     
  7. KCvale

    KCvale Motorized Bicycle Vendor

    I get good torque AND high speed via the bikes gears with a shift kit.

    [​IMG]

    That 66 will pop a wheelie, climb a telephone poll, and do ~50mph even with the 3" baloon tires.
     
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  8. Lammif

    Lammif New Member

    image.jpeg
    50kmh (32mph) flat, 60kmh down a slight hill. Mines the one at the front of the pic, stock as a rock
     
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  9. KCvale

    KCvale Motorized Bicycle Vendor

    ~32mph is pretty normal for a stock 66cc direct drive and usually good enough for most people, I'm just not 'most people' ;-}
     
  10. BikeMan2

    BikeMan2 Member

    I have done 60mph on my 66cc ZL Rod motor Stock head shaved, Piston skirt trimmed for intake and top ramped for exhaust, Boost bottle, NGK 5510 plug, Aftermarket CDI from Gasbike, 26 tooth rear sprocket and 12 tooth motor sprocket, Stock pipe modded for free flowing exhaust.
     
  11. KCvale

    KCvale Motorized Bicycle Vendor

    That must be some joy to ride :rolleyes:
     
  12. mthrfckr

    mthrfckr Guest

    Ive gotten my bike up to 58mph on flat ground and have been clocked several times at 63-65 mph going down hill. i have also been stopped for doing 45 in a 30mph zone.
     
  13. Ted

    Ted New Member

    My bike build goes 45mph with no shifting kit!

    This is what I have purchased:

    1. 66/80cc Flying Horse Silver Angle Fire Bicycle Engine Kit-bikeberry
    2. BBR Tuning Silver Boost Bottle Induction Kit-bikeberry
    3. BBR Tuning Boost Intake Manifold (30mm)-bikeberry
    4. Pull Start Assembly-bikeberry
    5. BBR Tuning Torque Up Exhaust Pipe Muffler-bikeberyy
    6. UNI Flex Carburetor Air Filter-bikeberry
    7. Uni Filter UFM-400 Filter Oil and Cleaner Service Kit
    8.High Performance Muffler Gasket-GXParts (need for when I bought my new muffler)
    9. BBR Tuning Billet Carburetor Racing Velocity Stack
    10. 80cc Motor bicycle Gas Engine 28 Teeth flat sprocket-ebay
     
  14. butre

    butre Well-Known Member

    I think you'll go faster with a bigger sprocket.
     
  15. Ted

    Ted New Member

    really?
     
  16. KCvale

    KCvale Motorized Bicycle Vendor

    Hows it do going up hill?
     
  17. gary55

    gary55 Well-Known Member

    Show us some pics. of this screamer.
     
  18. Frankenstein

    Frankenstein Well-Known Member

    Yes, think of a large wheel versus a small wheel at the same rpm, because of the larger circumference the bigger wheel is going to travel faster forward at the same rpms. Also means you don't need to spin the wheels as fast to get the same speed than what would be seen on the small wheels.

    Logically speaking if the sprocket is larger on the wheel then the speed will be faster at the same engine rpm just like how the wheels work on flat ground. You probably have to imagine the chain as being the flat ground since it's the only flat part touching the sprocket.

    If you notice that adding a larger sprocket made you slower then you probably messed up somewhere but it might be fixed by using a smaller rear wheel to offset the change in sprocket diameter.
     
  19. Street Ryderz

    Street Ryderz Well-Known Member

    If the sprocket is larger the wheel speed is less at the same rpm! A larger sprocket may allow a engine to unload to higher rpm witch could = more mph!
     
  20. gary55

    gary55 Well-Known Member

    I'm thinking a stock engine won't have the power to allow the 28 tooth sprocket to reach it's potential. Just to much resistance, so a larger sprocket could in this case provide more speed by allowing the engine to pull it. If you soup the engine up to have enough torque to pull the 28 tooth, better hold on to your hat. It's all about finding the sweet spot between rpm, torque, and gearing to suit your needs.
     
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