engine moves to left

Discussion in 'Motorized Bicycle General Discussion' started by pedrorican43, Jun 21, 2014.

  1. pedrorican43

    pedrorican43 New Member

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    i need help!!! Everytime i release the clutch, my engine shifts to the left, which causes the chain to shift as well, which in turn moved (and i think bent) my rim. I noticed that the rear engine mounts were loose, so i tightened them, but the engine still shifted when i released the clutch. The chain still stays mounted on the rear sprocket. How do i keep the engine from shifting to the left even after tightening the hardware? please help. I need to know how to do this myself, since i cannot afford to pay someone to do it. Thank you:-||
     
  2. crassius

    crassius Well-Known Member

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    if it moves, then it isn't tight

    did you put rubber under your mount? that will screw it up every time
     
  3. pedrorican43

    pedrorican43 New Member

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    there is no rubber under
    the mounts.
     
  4. 2door

    2door Moderator
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    You said you tightened the rear mount, what about the front one? How do you have the engine mounted? Got pictures?

    The front mount must be as secure as the rear one. If it is the engine can't move.

    Tom
     
  5. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    Without some pics its difficult to answer.

    A longer 6 mm bolt through the furthest back hole in the clutch cover that
    contacts the seat post will stop the motor from shifting to the left but there
    is also something wrong with your mounts if the motor moves that easily.
     
  6. pedrorican43

    pedrorican43 New Member

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    ok, here are some pics. There is no chain tensioner because the bike was set up without one. And i do not have the money for one
     

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  7. pedrorican43

    pedrorican43 New Member

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    Any advice would greatly help. I use this for my tansportation. dont mind the tire and tube, i was in the process of replacing a tube
     
  8. wheelbender6

    wheelbender6 Active Member

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    In the pic, your front motor mount appears to show open space in each side of the down tube. That open space on the down tube needs to be filled with something dense.
    -You could possibly cut some pieces of wood to fill that space. You could make it from wood scraps from a construction site.
    -Canadians will sometimes cut pieces of a hockey puck to fill the open space inside the motor mount. Use what you have on hand to fill the front motor mount. I don't think simply tightening the nuts will fix it.
    [​IMG]
     
  9. crassius

    crassius Well-Known Member

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    I can't tell from the pics what the rear mount looks like, but it should be tight enough to hold the engine all by itself for a while - try putting some PVC between rear block & frame.
     
  10. Dave31

    Dave31 Moderator
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    Having the chain way too tight will also cause this problem 1/2 to 3/4" slack is good.
     
  11. CARider

    CARider New Member

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    Your chain is way loose from what I can tell, I don't even see the tensioner on there. Make sure that chain is tight.

    Try this: If you feel like you can't tighten the engine anymore than you already have, put some good quality m6x1.0 studs in the rear, and get a pair of good quality 10mm nuts, then tighten it down good. Don't rip the studs out of the engine, the threads are cast aluminum. Is the chain jumping? Is in line? This will rip the engine from it's place even on a solid mount if the chain gets caught.

    My two cents.
    -Zane Smith
     

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