New engine with tight clutch!

Discussion in '2-Stroke Engines' started by darwinbikes, Jan 5, 2014.

  1. darwinbikes

    darwinbikes New Member

    Hi I have made a few motorised bikes before but never run into the trouble of opening the engine and the clutch not moving. Well this is my problem. When i push the pedal down that connects to the clutch the little sproket inside of the engine will not move. Can someone please tell me why this is happening. Is it either because the clutch is tight or is it because the clutch is broken?!?!?
     

  2. Fabian

    Fabian Well-Known Member

    Motorised bicycle engines do not have pedals, though the bicycle does have pedals. That said, i am thoroughly confused by your post.

    Can you please re-explain your problem with more technical detail.
     
    Last edited: Jan 5, 2014
    darwinbikes likes this.
  3. darwinbikes

    darwinbikes New Member

    Sorry Fabian. My problem is that when i opened up the engine and fitted it on the bike. I found that the clutch would not dissengage. And the drive sproket in the engine wouldn't move. I was wondering how to fix this?
     
  4. Bzura

    Bzura Member

    By "opened up the engine" do you mean that you have the sprocket cover removed (the plate that contains the clutch arm?) If that's the case, then the clutch isn't moving until you put that back on.

    Also, I'm just assuming you have a 49cc or 66cc 2-stroke & that may not be the case at all. And as Fabian mentioned, more details & technical data is really needed.
     
  5. darwinbikes

    darwinbikes New Member

    Hi Bzura,
    I've place the chain into the engine but when i try to dissengage the clutch the drive sproket will not move.
     
  6. Fabian

    Fabian Well-Known Member

    When you remove the cover that houses the clutch actuation arm, do you see a round pin of approximately 8mm or 5/16 of an inch in diameter, located in the centre of, and protruding approx 6mm or 1/4 of an inch past the outside face of the 10 tooth engine sprocket?


    [​IMG]
     
    Last edited: Jan 5, 2014
    darwinbikes likes this.
  7. darwinbikes

    darwinbikes New Member

    Yes Fabian I do see that in the cover that house my clutch arm
     
  8. Fabian

    Fabian Well-Known Member

    But do you have the 3/16 ball bearing that normally sits inside the hollow part of the shaft, and the cylindrical piece of metal called the bucking bar, that also sits inside the hollow part of the shaft?
     
  9. Bzura

    Bzura Member

    If you take out the spark plug can you roll the bike? If not the chain may be caught up in the front sprocket/housing.

    If that's not the case then perhaps you need to dig further. Read this thread & see if this is what's going on with your engine. Then follow the advice given & you should be up & running pretty soon.

    http://www.motoredbikes.com/showthread.php?27783-new-bgf-80cc-clutch-issues
     
    darwinbikes likes this.
  10. Fabian

    Fabian Well-Known Member

    That's a very good point.
     
    darwinbikes likes this.
  11. darwin

    darwin Well-Known Member

    Who's this darwinbikes guy? Keeping the evil eye on you!
     
  12. HeadSmess

    HeadSmess Well-Known Member

    ^^^^haha:jester:

    erm, new clutches are often stuck together...be brutal. hold clutch lever in, low gear, pedal, crack, job done ;)
     
Loading...