Bicycle Engine Tuning

This Post Has 49 Comments

  1. Tom

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    1. Steve

      Hi Tom, Try They have a few different types of expansion chamber. Although Australia has now prohibited the sale of 2-stroke engines, they still respond to emails in support of their customer base.

    2. Stewart

      These pipes were produced by a performance company called Octane Zombie. They are sold through

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    1. Steve

      Hi, Thanks for your comments. I have been in the Power Bicycle business for a couple of decades and wrote much of the technical data and installation instructions that have been plagiarized of over the years. Most Chinese manufactured bicycle engines now include installation instructions from my original website. I have updated installation instructions over the year to include engine modifications that were requested.

      You should find that the instructions and much of the tech data on this site will be more comprehensive and useful for modern engine kits.

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      I am glad the engine tuning was useful for you. I am interested to know what parts you found most useful and what performance benefits you got.

    2. Steve

      I have had a lot of positive feedback abut my engine tuning article. The article on carburation has also proved beneficial to many.

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    1. Steve

      I have already written several detailed articles on bicycle motors and how to tune them. Try this link to learn more

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    Oh boy oh boy am I glad I managed to find this website again after stupidly not bookmarking it! Just google searching best 2 stroke oil for motorized bicycle brings up all sorts of random “expert” bicycle engine forums… You know where it’s easy to find 5 pages of debate over AMSOIL,,, and 30 people saying all 2 stroke oils are the same!

    blah blah “pffuutt hhuuttufft kapppputttt BANG” ( Oh dear, and thats a sound of your 80cc engine goosed BTW)

    I’m no expert, but a childhood surrounded by awesome car tuners in the early 1980s doing the Santa Pod runs, Buxton high Edge raceway meets. And then the bikers too, not HOG bikers, real greasers 2 and 4 wheel oily eyeballed dudes…. Now from what I can gather, this site is from that same breed!

    these guys know there stuff and the oil suggestions are well tested. the recomenndations for tuning are well tested. All the tiny bits of advice on spark plugs and how to set them in position all of it, all comes from EXPERIENCE!!

    All the Tom’s and jack’s down the local pub who know it all because Fred and Brian oncesaid AMSOIL is the “best” for a 2 stroke engine way back in 1973. Well…. Tom, Jack, fred and Brian just take note, the gas lawnmower isn’t the same kettle of fish.

    I’m about to build my engine and I’ll happily bet a few hundred quid my engine is running well in a couple of years following every word said here… Thank you Ste and team for the age and for the work you’ve done over the years for 2 wheel sports and fun riding!

    Ever grateful a noobie bicycle engine builder 🙂


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