Clutch problems

Discussion in 'Motorized Bicycle General Discussion' started by apneely, Sep 2, 2009.

  1. apneely

    apneely New Member

    Sep 2, 2009
    Likes Received:
    I have a new 49 cc engine kit and am having a hard time with the clutch and chain. I assume that when I pull the clutch in (on handle bars) the bike should roll freely, thus letting me pedal. I pull the clutch in (disengage) and the bike does not roll. I have adjusted the clutch cable tighter and not so tight and still the same thing happens. Is the chain to tight maybe? I have a chain tension pully on it and the gap between the top and bottom chain is about an inch. The pedal chain is a little loose and the back tire cannot go any further back. Any suggestions?:-||
  2. 2door

    2door Moderator
    Staff Member

    Sep 15, 2008
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    Sounds as if your clutch isn't releasing. If you're certain the cable is tight you can try this old method for freeing a new clutch before going any further.
    Remove the clutch actuator cover, (left side of engine where the chain enters the sprocket). In the center of the sprocket is a steel pin which protrudes about 1/4" Try hitting that pin with a hammer. Don't hit it like you're driving a nail but give it a good rap. Sometimes the clutch pads are stuck from the factory and this shock against them will free them up and allow the clutch to disengage. Get back to us if it doesn't work. There are other things to try. By the way, that steel pin, and a ball bearing that is behind it will come out fairly easily. Don't loose them. Glob some grease on those partrs as well as the cam in the cover while you have the cover off.
    As for chain tension, you want about 3/4 to 1" of slack measured on the top portion of the chain with the bike being pushed forward. Just an afterthought, make sure your chain isn't bunching up in the clutch actuator cover/sprocket area. Loose chains can do that and cause binding of the rear wheel just like an engaged clutch.
    #2 2door, Sep 2, 2009
    Last edited: Sep 2, 2009

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