Motorized Bikes?

Discussion in 'General Bike Discussion' started by Doc, May 26, 2009.

  1. Doc

    Doc Guest

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    Does anybody out there own a motorized bike? They seem to be getting more and more popular these days. Would be interested in seeing your own designs etc.
     
  2. littleblackxj

    littleblackxj New Member

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    The last time i rode a dirtbike, i did this to my helmet.
    [​IMG]
     

  3. bootht99

    bootht99 New Member

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    i made one myself. i put a 25cc weed wacker engine on an old bmx.(like my sig says, i'm definatley redneck) i swapped a bunch of parts and now its a frankencycle. lol. it goes a good running pace. i'll have to get a video and some pics up. me and some friends had a little competion, who could biuld the fastest one. well that was a year ago, and so far i'm the only one that made one. lol.
     
  4. Doc

    Doc Guest

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    Ya I will be very interested in some pictures and maybe even a bit of directions.
     
  5. bootht99

    bootht99 New Member

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    i just put it together with bits and peices laying around the garage. the mount is mainly old gun racks from older police cars. i bolted a bike peg to the pto of the engine, and that is what spins the tire. i didn't want it to be chain driven, b/c i still wanted to be able to pedal. the only problem with it being direct drive, is that you have to lift the back tire to start it, and then run along beside it and jump on. once its warm though, you just have to start pedaling and it will start. you have to pedel up hills or on grass. works good for going to town.lol
     
  6. Dae-Dae

    Dae-Dae Guest

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    Yeah I think that motorized bikes have become more popular with the rise of gasoline prices and the economy. I live in a small town where everything is close by. Many people here ride bikes, scooters, or segways to work and school.
    Personally I have never been on a segway but I would like to try one out. How fast can speeds get on one? Does anybody know?
     
  7. 47Steve

    47Steve New Member

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    If you're into serious low-cost transportation, consider a Tomos moped. I have one, rode 7500 km since I got it last spring, averaging 107 mpg. Prices are $1000 - 1700, depending on model and dealer. Look at Tomos. Tomos has been making mopeds since 1954, and their engines are quite good. Their whole moped is good -- durable and simple for maintenance and repair.

    If you want a good hobby, add an engine to a stout bicycle, as suggested by other posts. Golden Eagle makes a good kit, sold via internet, with several engine options. But these add-ons are not really serious transportation -- some of the name-brand engines are quite good, but adding an engine to a bike puts a lot of extra stress on spokes, bearings, tires, and brakes. You're adding 12-20 lbs, usually hung out over the rear wheel, and you will be consistently running at higher speeds.

    For a cool-looking ready-made motorized bicycle that is strong enough for transportation, check out a Whizzer Bike. A guy in town has one, and it is something people will stop and look at. They are sold over the internet. I think the price is a little high compared to a Tomos moped, but it comes down to personal taste. The original US-made Whizzers are real collector's items when restored.
     
    Last edited: Jun 10, 2009
  8. COSMTBFAN

    COSMTBFAN DAS BOOT!!

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    It looks like they make a decent piece, but their web site is a touch on the lame side, IMHO!! They should out a little more time into it if you ask me...
     
  9. 47Steve

    47Steve New Member

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    Yes, I think the web site was designed by the factory people in Europe and translated into English. It hasn't changed in the past two years.
     
  10. Sludge

    Sludge Guest

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    I have seen people riding motorized bikes up and down my street, I think they take them at least 2 miles to school. I have heard they are legal to ride on the street, I am not sure what kind of license you would have to have.

    I once almost made a motorized scooter

    It was an old school one with oversized tires (6' diameter rubber inflatables) and I had a tiny kid bike with a sprocket on the back tire and similarly sized tire on it so I was stretching the back forks out to put on the sprocket tire then could mount a weedeater engine and put a throttle on the handle bars and hook it up with a chain or whatever..... theres a device you have to hook between the chain and motor but I forgot the name
     
  11. bootht99

    bootht99 New Member

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    a clutch? like one off of a chainsaw? or a sprocket possibly?
     
  12. bootht99

    bootht99 New Member

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    i dunno, i think tomoscanada.com website is pretty good and modern.
     
  13. skunky

    skunky Guest

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    I thought most of those engines just had a lever to give it gas... whats the clutch for
     
  14. 47Steve

    47Steve New Member

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    On a lot of motorized bike setups, there's a centrifugal clutch, so it's automatic. It disconnects the drive when the engine idles. Otherwise you couldn't stop without shutting off the engine.
     
  15. buckrogers007

    buckrogers007 New Member

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    My 50cc Gen II-A Motorbike Schwinn Cruiser

    Hello all, here is a pic (had to resize a few times to meet the forums small pic size so may not see the details:() of a build I did before adding the fenders and front rack. I did a lot of research and IMO the Starfire 50cc (if staying under for law reasons) Gen-II-A motor. Best motor to date at that size. I really liked the kit from bicycle-engines dot com price and free shipping. I would recommend getting a CNC rear sprocket, 44t out where I live with hills is what I like..instead of the kits sprocket. You can use it but for long term and durability, I would look around for that upgrade.

    Best sites I have gotten parts from and have no interest in them aside from great parts and prices is:
    bicycle-engines dot com
    usabikemotors dot com
    thatsdax dot com
    sickbikeparts dot com
    home.roadrunner.com/~bikeparts/

    I am just a perfectionist and just want to give from my huge research I did before ordering.

    Also, I prefer cruiser frames for the motor space (style/comfort/fatter tires...). Then a spring seat.
    My next build will be a Felt or Greenline with the bigger top tube to convert to a fuel tank...already have the bike.

    Peace
     

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    Last edited: Dec 9, 2009
  16. buckrogers007

    buckrogers007 New Member

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    ..PS, I do reccomend like most to not use the kit's front motor mounts. I made mine for 10 bucks and has not budged:)

    To do an upgrade to go faster...$20 air filter/clean muffler and carb intake areas with dremmel from some metal debris/expansion chamber muffler (sick bike parts for 65) /$6 fuel filter from amazon to see the fuel and mix color. Some upgrade the spark plugs...be careful not to get a top of line because it may burn a hole in the piston..medium grade is fine.

    Hope this helps.

    Buck
     
    Last edited: Dec 9, 2009
  17. buckrogers007

    buckrogers007 New Member

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    Motor Mount how to

    Hello all..again, going ahead and writing this before I have not time and is a for sure stump for most folks. I research and found 5 top ideas..and the one in the pic below is the best I think for sturdy/long lasting..and cheap..10 bucks

    *I used 2 A-24 L brackets from Home depot or such in wood section.

    *My front tube is 1" so I used a 1 1/8 muffler clamp from Napa Auto.
    *Use lag bolts instead of the u-bolt..may crunch frame. 2.5" lag bolts
    *I did use some kitchen drawl stick mat and someone suggested and works great. And did add 2 pieces of inner tube under the bottom mount to frame.
    IF you add rubber or such, then you may have to 'ground' the motor easily to the frame..I did this by attaching a wire with a screw/nut/locktite to the front end of the chain guard screw mount then ran the wire up to the CDI wire and pristo, engine is grounded And nicely snug to the frame with rubber and the Kill switch on the throttle works.

    I did have to lightly bend the metal bracket as you can tell to match frame cruve and dremmeled less than an inch off the 'L' part of the bracket to seat the motor the way I wanted with chain angled right was the purpose.

    Hope this helps:)
     

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    Last edited: Dec 8, 2009
  18. Elmo

    Elmo New Member

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    Here is mine. 30cc Homelite weedeater engine with friction drive.
    Elmo
     

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  19. buckrogers007

    buckrogers007 New Member

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    That's cool Elmo:) Nice laid back seat. Looks like 'maybe' a chain tensioner underneath the bottom frame tube mid way with a spring for 10 bucks might help 'if' have chain problems.

    Peace
     
  20. Elmo

    Elmo New Member

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    Thanks for the reply.
    I had a chain tensioner on it that I bought from some recumbent supply people when I loaned it to a fellow who wanted to try a recumbent. When I got it back the tensioner was gone and he had no idea where it went. I have been riding it without one and have had no problems. I still have one on my "good" bike. It don't have a motor. The one with the motor is my second build. I went cheap on it and used mostly parts that I already had. The first one was pretty sorry. I knew nothing about recumbent geometry and it was very unstable. I rode it about 50 miles and found that a recumbent in this style was what I wanted. Then I built one from a high end Trek Touring bike for a friend of mine and it was a real good bike. He rode it from Nashville, TN to Natchez,MS in 3&1/2 days 447 miles. The last one was built from 4130 oversize tubing .010 and .012. I used high end Shimano components and good wheels. Also has a Zipper fairing. I used the Toureasy plans from Gardner Martin on the last three.
    Elmo