new here, hello

Discussion in 'Introduce Yourself' started by jl ws-6, Jul 9, 2008.

  1. jl ws-6

    jl ws-6 New Member

    new to the site, had the idea of putting a motor on a bike in my garage, nice to see there's a site with some info on how to do it :)

    Probably the wrong forum, but has anyone ever mounted an engine on a mountain bike, so that the sproket on the engine drives one of the 2 front sprokets on the bike that are normally used for high and low range selection?

    My thought was to remove the pedals, hook it up in this fashion and add a set of foot pegs to the bike to rest my feet on, this would allow the rear gear selector to still be utilized increasing the range of speeds, and decrease the engine power needed (being that I"m 6'3 and 275lbs, this is somewhat important, and where I live there's alot of hills)

    If this can be done, I am very intrested in how it was set up. I have a machinist available if I would have to make parts that's not a problem.

  2. NunyaBidness

    NunyaBidness Member

    hey jl ws-6
    you've found the right place
    I've spent the last week or so just reading and looking at the pics
    there are several people that have done what you are talking about
    do a search for 'jackshaft' and you will see what I mean
    welcome to the forums and good luck with your build
  3. Alan

    Alan Member

    I deleted this post. 50 mph on a bicycle is too dangerous. Stick with the jackshaft idea.
    Last edited: Jul 9, 2008
  4. jl ws-6

    jl ws-6 New Member

    Actually I'm very intrested in the 50 mph setup. Not that I want to go that fast, but with the thing geared down some it probably would have an easy time pulling someone my size.
  5. Pablo

    Pablo Motored Bikes Sponsor

    You could spend a lot of time and money on yours and you wouldn't have a bicycle anymore if you remove the cranks and pedals....making an illegal motorcyle. Plus, would you add a pull start or start on hills all the time?

    Would you be willing to spend $199+shipping for a fully engineered and thoroughly tested, safe (comes with 3 chain guards) bolt on kit?
  6. Pablo

    Pablo Motored Bikes Sponsor

  7. jl ws-6

    jl ws-6 New Member

    I"m not entirly worried about the legality of it, honestly I'm a drag racer so with that in mind some of the things I've done over the years as far as illegal stuff on public roads, riding a small engine powered bike is really not something I'm all that worried about (I only race at tracks now, so no lecture please)

    I'm intrested in any kit that is available, I'd much rather do what's commonly referred to as a jackshaft setup on here, this seems like the easiest way to go about it.

    I was about to buy a scooter, until I saw someone with what looked like a weed whacker motor on a bike while I was on vacation at the beack last week, so that's what has me here. My thought was to build one that would be alot cheaper then spending 2 grand on a scooter, plus something that's made like this is more my style anyway :)
  8. Pablo

    Pablo Motored Bikes Sponsor

    Above is the jackshaft kit. No lectures from me. :grin:
  9. jl ws-6

    jl ws-6 New Member

    no that setup above is what I had in mind, but a step further, a set of pegs to put my feet on rather then the actual pedals.

    That, and a pull starter would be perfect.
  10. Pablo

    Pablo Motored Bikes Sponsor

    Cool on the pull starter, because without pedals it would be the only way to start the engine. The other thing is with your rear gears, taking off with the clutch and engine power alone is zero problem.
  11. jl ws-6

    jl ws-6 New Member

    Right, because I can change the rear gear, and the engine will run off one of the 2 front sprokets that are usually on the crank this should give plenty of reduction to get the thing moving, and then with the rear seletor will get the speeds up.

    Now to find a kit that will bolt up and do what I am looking to do.......
  12. Pablo

    Pablo Motored Bikes Sponsor

    This kit bolts right up. Leave the pedals off and get some pegs. Here's a few shots of my bike in various stages over the months:

    Attached Files:

    Last edited: Jul 10, 2008
  13. jl ws-6

    jl ws-6 New Member

    You have a link to the manufacturer of that setup?
  14. Pablo

    Pablo Motored Bikes Sponsor

  15. jl ws-6

    jl ws-6 New Member

    Cost, availaibilty, what are you using for a motor, all things that I"m very intrested in.

    I haven't bought a bike yet, I wasn't planning on spending a fortune on the bike, I"m gonna try to keep the whole thing under 1200 if I can only because I can get a new scooter for 1200 and this is an attempt to do this a little cheaper.
  16. Pablo

    Pablo Motored Bikes Sponsor

    $199 + S&H for the jackshaft - Shifter Kit. Available July 21. I'm using a 67cc HT 2T engine - it will work with any variant of the HT clone 49cc-"80"cc.

    Engine prices from the site sponsors are reasonable.

    Depending on the bike of course, but you should be well under $1000.
  17. legality depends...

    really doesn't legality depend on what state you are located and where you plan on riding the thing? IN Mass as long as you under 50cc you can get a sticker even if it's got pegs- mopeds and scooters can apply.:evil:

    that being said, with less than 50 cc your probably going to need pedals to assist the motor. :p
  18. jl ws-6

    jl ws-6 New Member

    I have no intention of a 50cc motor, I want to put the biggest one on I can.

    Now this HT 2T motor, is there really a 80cc oen, because I read that most aren't really that big. What about the exhaust and fuel tank setup, anyone have all that stuff all together in one package to make it simple?

    Pablo is there someone that sells all the stuff I'd need to bolt this right up on a saturday and be ready to go?
  19. why 2 stroke go 4 stroke

    why not go 4 stroke and get some horses under there? You could probably mount up a 6.5+ hp engine in there and go fast.:evil:
  20. jl ws-6

    jl ws-6 New Member

    I'll be honest, I will most likly end up buying the said kit for 199 bucks, and I'd like to start off with a 60cc or so motor, 4 stroke would be nice just so I don't have to be bothered with the gas mixing.

    I can already see where this will end up, I'm most likly going to end up getting the little motor on it and do that for a while, but I can see myself cutting the bike frame and making a mount for a 3 to 5 hp leaf blower motor on it with a motorcycle muffler to make it quiet. That would probably be a little too fast not to be noticed though, I had a go-kart when I was a kid that started with a 5 hp leaf blower engine, and that with just a single speed and a centrifigual clutch would go 45 mph all day long, a bike with 6 or 7 gears probably would be relativly unsafe like that, and would be breaking stuff I'd guess.

    A 60ish cc motor, with the right gear reduction and the use of the rear 6 or 7 gears whatever the standard mountain bike should be enough. As long as I can maintain at least a 15 mph speed up a decent hill and go about 30 to 35 on a flat with my 275 lbs on it is fine. I'm not looking to break land speed records, I have a drag car that I play with when I want to go real fast, I'm just looking for a way to make my 15 mile round trip commute to work 5 days a week on about a gallon of gas in a somewhat reliable manner. If it wasn't for the hills and the speed of the traffic I have to keep up with, I'd just pedal, but I can't get to work looking like I ran a marathon, and this looks like something I can deal with, the scooter, I could do but that's not really my style. Something that looks somewhat home made, I can deal with :)