Clutch not disengaging when hot

Discussion in '2 Stroke Bicycle Engines & Kits' started by LongboardMalinois, Jul 9, 2016.

  1. LongboardMalinois

    Joined:
    Jul 5, 2015
    Messages:
    128
    Likes Received:
    0
    This is a problem that a friend's bike is having, so I don't know much about it. He says that as soon as his engine gets hot the clutch stops disengaging. I've already had him tighten the nut on top of the clutch arm, since I thought that could be the problem, but it is still happening. Any thoughts?
     
  2. 2door

    2door Moderator
    Staff Member

    Joined:
    Sep 15, 2008
    Messages:
    16,323
    Likes Received:
    98
    First let's be sure we're talking the same language because many times 'engaged' and
    'disengaged' get mixed up.

    Does the clutch slip when the engine is hot or can he not "disengage" the clutch allowing the bike freewheel?

    I'm not talking down to you and mean no disrespect but the two terms are quite often used in reverse of their meaning.

    Tom
     
  3. LongboardMalinois

    Joined:
    Jul 5, 2015
    Messages:
    128
    Likes Received:
    0
    The clutch will not disengage, meaning that it will not let the bike freewheel.
     
  4. crassius

    crassius Well-Known Member

    Joined:
    Sep 30, 2012
    Messages:
    4,032
    Likes Received:
    153
    could be bad bearing in clutch hub - also could be fine steel wires from pads getting caught in hub bearing - it weird cases, could be constantly slipping clutch that eventually swells up the pads
     
  5. LongboardMalinois

    Joined:
    Jul 5, 2015
    Messages:
    128
    Likes Received:
    0
    Thanks crassius! I'm having my friend check the hub bearing. I also told him about the clutch pads, but I don't think that his clutch is slipping.
     
  6. totalnewb

    totalnewb New Member

    Joined:
    Jun 19, 2016
    Messages:
    103
    Likes Received:
    0
    I'm having a similar issue in that when the bike gets hot my clutch tightens up a bit. I've adjusted the clutch several times. I'm not sure why it keeps happening as I would expect the opposite to occur. I will be very interested in the resolution to this issue.
     
  7. crassius

    crassius Well-Known Member

    Joined:
    Sep 30, 2012
    Messages:
    4,032
    Likes Received:
    153
    if the sprocket nut is getting loose, the whole shaft may be moving away from the clutch arm - similar if clutch nut is loose with clutch moving away from actuator rod
     
  8. totalnewb

    totalnewb New Member

    Joined:
    Jun 19, 2016
    Messages:
    103
    Likes Received:
    0
    Not trying to steal the thread but for me, I know If the sprocket nut is what I think it its I know its not moving because there is a little screw holding it in place.
     
  9. LongboardMalinois

    Joined:
    Jul 5, 2015
    Messages:
    128
    Likes Received:
    0
    No, you're thinking of the flower nut. The sprocket nut is on the other side, in the middle of the drive sprocket.
     
    #9 LongboardMalinois, Jul 12, 2016
    Last edited: Jul 12, 2016
  10. LongboardMalinois

    Joined:
    Jul 5, 2015
    Messages:
    128
    Likes Received:
    0
    My friend solved his problem by "adjusting" the clutch, so feel free to take the thread.
     
  11. totalnewb

    totalnewb New Member

    Joined:
    Jun 19, 2016
    Messages:
    103
    Likes Received:
    0
    I have not looked at this nut you are talking about. I'll take a look tonight. Maybe I will find a resolution as well.
     
  12. Joseph Talmon

    Joseph Talmon New Member

    Joined:
    Aug 1, 2016
    Messages:
    3
    Likes Received:
    0
    Hi my name is Joe and I'm having a problem with my clutch when I put it together the lever to engage the clutch when I pulled off the case front to thread a chain through I did not know what went inside it was it the bucking pin and was there anything else after that a spring a bearing or did the bucking pin go first which order and what goes in there haha
     
  13. Joseph Talmon

    Joseph Talmon New Member

    Joined:
    Aug 1, 2016
    Messages:
    3
    Likes Received:
    0
    Re: Clutch stuck can't pedal won't disengage the motor

    Please help I have a two-stroke flying horse slanted motor for my pedal Chopper. When I had to thread the chain through where the clutch lever is at. I removed the plate and did not know what was inside or the order found out there was a bucking pin and what else
     
  14. Joseph Talmon

    Joseph Talmon New Member

    Joined:
    Aug 1, 2016
    Messages:
    3
    Likes Received:
    0
    Re: Clutch not disengaging

    Yeah this is only about the clutch lever what goes behind it what is it in engage is there a string is there a bearing is there I mean spring in what order bucking bucking pin is the only thing I saw was there a bearing after it was there a spring please help
     
  15. Chaz

    Chaz Well-Known Member

    Joined:
    Jun 3, 2012
    Messages:
    1,004
    Likes Received:
    66
    The spring is deeper inside and can't pop out, don't worry. The ball bearing goes in first and then the thick bucking bar.
     
  16. totalnewb

    totalnewb New Member

    Joined:
    Jun 19, 2016
    Messages:
    103
    Likes Received:
    0
    Still happening and I checked the sprocket nut, does not seem to be loose. Last night the clutch tightened up so much that it would not disengage.

    Question:

    How often should I be adjusting or replacing my clutch?
     
  17. crassius

    crassius Well-Known Member

    Joined:
    Sep 30, 2012
    Messages:
    4,032
    Likes Received:
    153
    replacing pads is rare unless bike has several thousand miles on it

    adjustment is whenever it acts funny

    next time is does it, take off the cover while it is still hot to see if you can find what is happening in there - see if outer plate is completely off of pads when lever is pulled - see if bearing in center of clutch hub is freely spinning
     
  18. totalnewb

    totalnewb New Member

    Joined:
    Jun 19, 2016
    Messages:
    103
    Likes Received:
    0
    This may or may not be another clue but when I'm riding I often pull the clutch before going downhill (is this good?) and when I first pull the clutch I hear a squealing kind sound that stops shortly after like winding out. I've lubed the chain guide, chain and rear sprocket with no effect.
     
  19. crassius

    crassius Well-Known Member

    Joined:
    Sep 30, 2012
    Messages:
    4,032
    Likes Received:
    153
    have you greased the bucking bar and clutch arm and drive gears? search here on the board to see that
     
  20. totalnewb

    totalnewb New Member

    Joined:
    Jun 19, 2016
    Messages:
    103
    Likes Received:
    0
    I think you have it. I searched a few posts and I think this is my problem. I will apply the grease as suggested tomorrow.
     

Share This Page