Bicycle Engine

Discussion in 'Motorized Bicycle General Discussion' started by paul, May 15, 2008.

?

what type of bicycle engine do you have

  1. 2 stroke bicycle engine

    336 vote(s)
    79.6%
  2. 4 stroke bicycle engine

    76 vote(s)
    18.0%
  3. electric bicycle motor

    4 vote(s)
    0.9%
  4. hybrid (more than one motor type)

    2 vote(s)
    0.5%
  5. All the above

    4 vote(s)
    0.9%
  1. WECSOG

    WECSOG Member

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    I agree with you about electrics. As for the longevity of two strokes, it all depends on how the two stroke is designed and its build quality; same as with a four stroke. A four stroke doesn't last long if run at maximum rpm for long periods of time, either.

    Now, about that "pump gas" comment. I used to be averse to mixing up a special fuel blend too, but I've changed my outlook. Start with modern diesel fuel. What we are forced to buy from the pumps now is designed specifically to kill old-school, mechanically injected diesel engines. So for my old school diesels I have to mix my own fuel that won't harm them. In the process, I can make fuel that is even better than the old diesel was.
    A similar situation exists with regular pump gasoline now. Modern cars are designed to deal with the deliberately low-quality and adulterated gasoline that is foisted off on us now. Carbureted engines aren't. That stuff is death on old-school carbureted car engines, and even more so on small engines. It's not good for even modern engines, but they are designed to put up with it so long as the car is driven regularly to keep a fresh supply of fuel running through it. That stuff is designed to kill old engines and engines in cars that don't get driven much, and to intentionally limit the life of small engines. Keynesian economics at its worst.
    All that is to say, I don't run regular pump gas in my small four stroke engines either. I seek out good quality, non-ethanol gasoline and store it in 5-gallon cans for use in my motorcycles, motorized bikes, boat motors and other small and/or carbureted engines. Then I add oil to some of it as needed for my two stroke engines.
    I've learned to embrace the concept of seeking out the best fuel for my engines, since I cannot rely on the normal supply chain to deliver fuel that won't kill my engines..shft.
     
  2. ultralight01

    ultralight01 New Member

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    Yeah, I get all of my small engine gas from a specific station that has 100% non-ethanol. It's the best I can get in this small town.
     
  3. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    Here it is, 7 years later. I still have Snow Tiger, my Diamondback Response MB. The powerful but unreliable GP460 engine has been replaced with a less powerful, super reliable 2.8hp Tanaka 47R powerplant and matching expansion pipe.

    If and when they develop a reliable clutch for the 460 engine, I'd be willing to reinstall it into Snow Tiger.
     
    #103 5-7HEAVEN, Apr 12, 2017
    Last edited: Apr 12, 2017
    chmn22s likes this.
  4. Kletus

    Kletus Member

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    You can't judge 2-stroke engines by these Chinese low quality 2-strokes. I love 2-strokes and if the Japanese ever build one for bicycles I'll come right back. Right now my bike is powered by a 79cc HF engine that will do about 40 MPH though I have had it there only once. To scary, I keep it down to around 20-30 MPH normally. LOL,dogs love to chase me.
     
  5. TheNecromancer13

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    40 mph? Scary? C'mon, live a little! You get used to it. Now 70 mph, that's scary. Won't be taking my new build that fast again for a while. Got any pics of your 79cc bike? I like to compare my 79cc to others'. Here it is:
    [​IMG]

    My 79cc also tops out at around 40.
     
    Tom from Rubicon and chmn22s like this.
  6. Larry Trotter

    Larry Trotter Member

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    If you need good gas you can find it at the local small airport. Mostly all they use now is called 100 LL for 100 octane low lead. It is designed for use in engines that were designed for 80 octane leaded and the 100 octane aircraft engines. Best thing is that is does not hold water like car gas can. Larry
     
  7. The Stray

    The Stray New Member

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  8. The Stray

    The Stray New Member

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    Hi, I’m planning a 212cc predator build.
    I don’t want it to be a pull start. I’d prefer it to be a pedal start. What is the best way to do this? A 3D manual clutch? Or some other option? Thanks!
     
  9. msrfan

    msrfan Well-Known Member

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    3D would be a great choice. Their kit bolts right on and works very nice. Another option would be to make a kick starter similar to the one I just made for a Briggs motor.
     
  10. Gbrebes

    Gbrebes Active Member

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    Merry Christmas Dale,
    Do you have a build thread on the Briggs kickstart? I would like to see that.

    Gilbert
     
  11. curtisfox

    curtisfox Well-Known Member

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  12. Gbrebes

    Gbrebes Active Member

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  13. msrfan

    msrfan Well-Known Member

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    Hey, Merry Christmas Gilbert, Curt and the whole forum.
     
  14. msrfan

    msrfan Well-Known Member

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    Gilbert, my kickstart design will work on any engine with the four threaded holes around the crank shaft. Still a lot of fabrication to do. Let me know if you decide to make one and I'll get a mounting plate made for you.
     
  15. curtisfox

    curtisfox Well-Known Member

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  16. Otero

    Otero Member

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    I have all of the above, if I can count the hybrid under construction. Preferences?
    My electric, Juiced Bikes CCS is a super commuter. My Tanaka/G.E.B.E. is a
    dandy ATV. I've modified the gasser to the same 9 spd as the CCS, but
    it has a triple ring in front for powerless pedaling. CrossCurrent_S_-_Black_-_Side_-_Right_-_2500_px_2048x2048.jpg 009.JPG

    The Tanaka & tank discreetly covered in stealth mode. The CCS is just amazing for
    asphalt & moderate distances, but the gasser will go anywhere.
     
  17. FZ1

    FZ1 New Member

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    In case anyone doesn't know, CL is:
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    Greg58 likes this.
  18. Otero

    Otero Member

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    I'm glad you CLarified that for us.
     
  19. FZ1

    FZ1 New Member

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    Your quite welcome. Anytime I have the time. lol
     
  20. LaughingGas

    LaughingGas New Member

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    Got me a 2stroke kit on some 6 yrs ago, finally got it on a bike after sitting for 5 of them yrs, Ok, Ok, Ok,, What a rush this little weapon is, on 23yr old mountain bike(my first), Pheonix, Ditchpig. This is a Hoot, I'm gonna kill myself lmao
     
    FOG likes this.

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