Wanted: Best gas motor conversion kit.

Discussion in 'General Questions' started by ekramer, Jun 5, 2008.

  1. ekramer

    ekramer New Member

    So many products, yet so little time. I'm deluged with how many products are out there, yet, as a newby I don't have the tech savvy to wade through it all to make the best choice. I'm desperate to avoid buying ****.

    What I need is advice on which gas engine conversion kit is best. Looking for high quality, under 50 cc, and ease of installation. Cost is less important to me than quality. Can anyone speak with authority for a no-miss conversion kit matching these requirements?

  2. eljefino

    eljefino Member

    2 stroke or 4?

    A 2 stroke has nearly 2x the power of a 4 stroke while remaining under the legal limit of 50cc in many states. If you want speed and hill climbing power this is for you.

    But, hp for hp, a 4 stroke is more efficient and better for the air. A 2 stroke by design wastes 7-30% of the gas that goes through it.

    You seem like you would want the GEBE kit off to the left, rear rack mount with belt drive.

    This also allows you to use a full suspension bike; the bike is as important as the motor.

    I would get a mountain bike with front disc brake, stopping is important too. :)

    May then consider getting "ape" handlebars that curve up so you can sit more upright and see the world.

    That would be my quality build, without regard to price.
  3. loquin

    loquin Active Member

    Take a look at Sparky's Crash Course for a summary of info.

    I would say that GEBE and Staton are the two top vendors from a quality standpoint. Both vendors take pride in their products, and only sell high quality, EPA/CARBII approved motors. Honda, Robbins-Suburu, Tanaka, Mitsubishi, and the like. Their kits cost a little more, but, you DO get what you pay for.

    Ease of installation is with a friction drive system, first, probably GEBE (Golden Eagle) second, and Staton chain drive third.

    Staton makes a friction drive. I use a Staton friction drive - it is of excellent quality, and is very easy to install. However, there are a few caveats regarding friction drives. First - they are less efficient than either chain or belt drives. The drive roller presses into the tire, increasing the rolling friction of the wheel. Second - The tire will also wear somewhat faster than with a chain or belt drive. Not only is the tire rubbing against the ground, it's rubbing against the roller too. Third - they don't work as well when they're wet. You get more slippage on the roller, and in order to account for this, you either need to avoid rapid acceleration (go easy on the throttle) or increase the roller pressure against the tire. It's very easy to do with the Staton. If you want to peddle, there is a noticeable drag unless you disengage the roller. On the Staton this takes about 10 seconds.

    GEBE belt drives are also fairly easy to install. They do take more effort to get them mounted than does a friction drive, and, the toothed pulley takes some finagling to get it centered correctly on the wheel. Also there are reports of a higher rate of spoke breakage than with the other two, and the belt is susceptible to dying. Also, if you tend to 'push' the motor more at startup, you tend to see reduced belt and spoke like. Seasoned GEBE riders emphasize avoidance of jackrabbit starts. And, there is a definite upper limit on HP with the GEBE system. Less than 2 HP is recommended. Also, if you want to peddle, there is a noticable drag unless you remove the belt. (granted, this only takes a moment.)

    The Staton chain drives take a little more effort to get installed than the GEBE belt drive, but, they are VERY rugged. He uses the same gearbox on his motorized wheelbarrows that can haul more than a thousand pounds, and the gearboxes come with a lifetime guarantee. There's no HP limit either, and you can do the jackrabbit starts as often as you like. A freewheel sprocket on the rear wheel is used, which means that you can peddle at any time with no resistance, as the freewheel will just tick along.

    With both the GEBE and Staton systems, you will probably want to make the rear wheel a little beefier - get heavier 12 gage spokes installed. On the friction drive systems, a smooth rear tire is recommended.

    Sometime, in the not-too-distant future, I'm looking to move to either a Staton chain drive, or a GEBE.

    BTW. There was a recent discussion regarding staton vs. gebe in this forum.
    Last edited: Jun 5, 2008
  4. SirJakesus

    SirJakesus Guest

    "Best" is a matter of opinion and situation. Personally I think the best and most durable kit is the staton chain drive in single speed or nuvinci CVP. I love mine and wouldn't want any less now.
  5. Kazzamoto

    Kazzamoto New Member


    So I've read a lot of posts all over the place, and now that it's 2013, Is there a great and reliable kit out there? And web link please? I'm basically starting from scratch and most likely put it on a GT2-A frame... So far looks like the best 2 stroke motors come from spooky tooth. I'm also going for the sort of Board track racer look...
  6. LR Jerry

    LR Jerry Well-Known Member

  7. joshua97

    joshua97 Member

    best 2 stroke is a screaming roo kit, google perth motorised bikes
  8. IbedaYank

    IbedaYank Member


    Stanton-inc... make sure you get signature delivery and inspect before signing

    EZM with a Honda GX50
  9. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    It is 2013 and Spooky Tooth is really no more because they were sold to BikeBerry
    so everything for sale on Spooky is the same as ordering from BB.

    If you want a Board track racer look for a bargain price check out www.SilverStateCycles.com
    They are local to you in Las Vegas so you could see their stuff in person.
  10. tom1850

    tom1850 Member

  11. laugh

    laugh Member

    My vote has to go with the GEBE as well. Rode mine 45 miles today with no problem and no expected problems. I also tend to believe that suspension frames are bad with MAB's or any kind of bike. Evry time you stop or go you throw power into your suspension that could be put on the rode. However, riding something with minimal suspension means you need to develop bike skills but that can be done. Of corce all ihats just what I like, your perfect kit will be what you like and I would have it no other way.