Bike won't go!

Discussion in '4 Stroke Bicycle Engines & Kits' started by theflash1327, Apr 17, 2011.

  1. theflash1327

    theflash1327 New Member

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    I have looked everywhere i could find on the site and just couldn't find an answer. I got my 4-stroke kit from Daemon Bikes running. It worked fine. I waited over night and then worked on the back sprocket a bit, (needed centering) and now it won't move. It starts fine and when i twist the throttle i can hear it working, but the chain doesn't move and the bike goes nowhere. I tried pedaling it to make sure the chain wasn't stuck and it works fine. I was wondering if it was maybe the spark plug. How do i check? I am very new to this so please be specific. Thank you everyone!
     
  2. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    Sounds like the centrifugal clutch in the gearbox is the culprit.
    those gearboxes are very low on quality
    they are cheap but you get what you paid for
    the clutch bell may have separated.

    Definitely not the spark plug cause it is running.

    take the cover off the gearbox and take a look.
     
  3. theflash1327

    theflash1327 New Member

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    Thank you very much! I will take a look.
     
  4. theflash1327

    theflash1327 New Member

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    Turns out to be a sheared woodruff key. I hope that is the only problem. Can't wait to get on the road!
     
  5. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    Thats great news!
    Even if the gearbox eats it you can upgrade to a Grubee G 4 gearbox.

    Do you have any pics?
     
  6. theflash1327

    theflash1327 New Member

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    Finally got it running! Very fun bike. I now plan on learning about 2-strokes! I will post pics soon.
     
  7. theflash1327

    theflash1327 New Member

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    Finally got some pics up! This is my 4-stroke Cranbrook cruiser. I put some nice cool flames on the tank too. =)xct2

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  8. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    Hey, very nice looking bike and a clean build too.

    Paint that red cover and put some flex exhaust on it like
    Motomagz and it will run better too.
    http://motorbicycling.com/f38/monark-build-4-stroke-shift-kit-28004-3.html#post275664

    I will be shocked if that JL Hoot gearbox holds up though, good luck.
    How is it running? Is the box noisy?

    WARNING: Reinforce that front fender cause when the flimsy bracket snaps
    you will be catapulted over the front wheel
     
    #7 MotorBicycleRacing, May 9, 2011
    Last edited: May 9, 2011
  9. Mike B

    Mike B New Member

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    Those bags are great!

    Where did you get them?
     
  10. theflash1327

    theflash1327 New Member

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    Thank you! I will look into the flex exhaust. Thanks for the tip! The gearbox is running okay. I meshed the gears better and put in some lithium grease. I need a heavier grease because the lithium grease broke down and just melted to the bottom. Also, yesterday i was tightening the screw over the clutch and small gear (it kept coming lose and the clutch would screw up the pull start and lurch the bike forward..) and i snapped the screw. I will have to back it out somehow...That stinks..but it runs well and gets some good speed!

    Oh, and i got the bags on ebay for 5 bucks each with 5 dollars shipping! Sweet deal! I put all my tools and things in there.
     
  11. theflash1327

    theflash1327 New Member

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    Oh, BiMoPed, I just noticed your other post. Is it possible to switch to a grubee gearbox without much trouble? I saw some older threads and people said there was no replacement for a gearbox. I would love to get rid of this one..I am starting to like 2-strokes, but this thing has some good power..
     
  12. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    This is the Grubee 4 G gearbox you need for your 15mm?? shaft Huasheng
    You might have to use a shim to make it work with the 16 mm 4G
    4G T-Belt Transmission (Honda) [4G-TBELTTRANS-HD] - $139.99

    They are out of stock, was selling for $140

    Your Huasheng will also take an EZ Motorbike Q Matic that sells for $260?
     

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