most reliable 70cc 2 stroke engine?

Discussion in '2-Stroke Engines' started by jatgm1, Apr 28, 2016.

  1. jatgm1

    jatgm1 Member

    what is the most reliable 2 stroke engine that can be easily mounted on a bicycle? (easily being a flexable term) do they sell some kind of honda, or something, engine that you could slap on a bicycle?
     

  2. butre

    butre Well-Known Member

    denardis is reliable and considering what you get relatively inexpensive. out of the box the 50cc denardis makes about 5 times the power of a 66cc China girl
     
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  3. jatgm1

    jatgm1 Member

    how would that be mounted on a bicycle? are there mounting brackets on the engine or does it come with some sort of adapter? if not is there somewhere an adapter can be purchased?
     
  4. jatgm1

    jatgm1 Member

    i dont see much on the internet about the denardis, it looks like its high performance but im yet to see a bicycle with one mounted. i actually couldnt even find a single video of one of the engines at all.
     
  5. 45u

    45u Active Member

  6. skyash

    skyash Active Member

    The only motor I can say is not reliable is a 66 cc
     
  7. 45u

    45u Active Member

    How many genuine Grubee Skyhanks have you owned? Are you taking from experience or what you heard????????? Grubee is the original maker of these motors and every one else copied them! Take time to do a search and see what others say. I know what they are going to say!
     
  8. butre

    butre Well-Known Member

    mounting brackets will have to be made but it's a very simple to do. look up KTMC 50 for examples.
     
  9. 45u

    45u Active Member

    If I am not mistaken you not only have to make mounts you have to get all the other parts to install like chain, rear sprocket and mounting for sprocket and so on. Please correct me if I am wrong correct me, you are talking about the KTM clone?
     
  10. 45u

    45u Active Member

    I just looked and if we are talking about the same motor it is over $500 and does not come with a exhuast, air filter, chain, rear sprocket and mount and so on.
     
  11. butre

    butre Well-Known Member

    he didn't say anything about price, he asked for the most reliable 2 stroke that can be put on a bicycle, and denardis is up there on the list.

    and yes, you do need to fabricate mounting brackets for that motor.
     
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  12. 45u

    45u Active Member


    If money is not a issue then I would get the real deal a true KTM motor. There are MANY motors to put on a motor bike if you what to fab most of it. Do not rely on posted HP ratings!
     
    Last edited: Apr 28, 2016
  13. butre

    butre Well-Known Member

    the original KTM motor (made by franco morini) makes less power and parts are not as readily available.

    plus they're cheaper and from what I've seen reliability is similar.
     
  14. 45u

    45u Active Member

    Just wondering have you owned both or either? There are many other motors you could put on a bicycle that has even more power. As I said do not take TOO much stock in posted HP ratings.
     
  15. skyash

    skyash Active Member

    From what I have heard the ktm make less power but is faster I think it's made better
     
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  16. butre

    butre Well-Known Member

    I haven't owned either but I've ridden both and at least according to my butt dyno the denardis makes more power.

    there are factors other than quality you have to consider when selecting a motor such as size constraints and ease of mounting and parts availability, and the denardis ticks all those boxes.
     
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  17. You can find the Grubee 66cc 2-stroke complete engine kit at Bicycle-Engines.com or call me at 406-586-5970 and I will help you out! Mention this post and I will get you 10% off of your order!
     
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  18. 45u

    45u Active Member

    Thanks all for the very informative information. Butt dynos tell a lot! I will have to put this on my dream list as I sure would like to have one. Maybe be one day it will be able to be put on my wish list.
    Thanks
    Jeff
     
  19. sully1617

    sully1617 Guest

    take everyones opinion with a grain of salt. fact is these china engines are mass produced and as such have an occasional defect, however you can't beat the price for a kit bike at under $200 delivered to your front door. now for my opinion, i have a grubee skyhawk that i bought in kit in 2011 and it still runs like it's being chased by a rabid dog. i have only had a small problem with the carb in all that time so i'm not complaining. vacuum leak was an easy fix. it does need some tlc right now but i can jump on it and take off still to this day and not worry. if you decide to go with a grubee make sure you but from a reputable dealer and don't but a knockoff
     
  20. jatgm1

    jatgm1 Member

    i bought a knockoff, therein lies the problem. it runs, but after fixing the seals and the leaking carb with gasket maker, i now have to replace the clutch arm and bucking bar. i was debating making a bucking bar and trying to finagle this clutch arm to work but, honestly, if i replace all the fallible parts, the engine must be infallible right? i was hoping to make this, and turn around and sell it for more than i paid to then perpetuate this cycle. however if i sell it, and get a denardis engine, and then figure out how to weld and mount it, i could probably sell a denardis engine bike for considerably more, plus, i would have much more experience in these things. which was the main reason i started on this, to learn about the electric motors handicapped cousin, the internal combustion engine.
     
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