Brand new to gas bikes.

Discussion in 'Introduce Yourself' started by Ludford, May 5, 2013.

  1. Ludford

    Ludford New Member

    Joined:
    May 5, 2013
    Messages:
    13
    Likes Received:
    0

    Tried that, pushed it all the way in by hand but the wheel still refuses to turn.
     
  2. Tyler6357

    Tyler6357 Member

    Joined:
    Mar 15, 2012
    Messages:
    822
    Likes Received:
    12
    Hmmmm, it sounds like the clutch is not disengaging. Make certain it is assembled properly. Try this: Remove the clutch plate (3 screws), pull out the long metal piece in the middle of the engine sprocket, make sure that the clutch baring (small round steel marble) is in the hole, can you see it in there? make sure the clutch lever is pointed toward the back of the bike, now reassemble.

    I don't see how the engine could be seized if you got the chain on the engine sprocket.
     
  3. Ludford

    Ludford New Member

    Joined:
    May 5, 2013
    Messages:
    13
    Likes Received:
    0
    I took of the cylinder head and gobbed oil in there, rocked it back and forth and the engine unsiezed. There's no cylinder wall damage.

    However after spinning freely for a while the engine will seize again and has to be rocked back and forth to unsieze.
     
  4. Tyler6357

    Tyler6357 Member

    Joined:
    Mar 15, 2012
    Messages:
    822
    Likes Received:
    12
    Oh really? wow, I'm sorry, I'm not an expert on these engines. It's possible that the piston rings are not lined up properly. I would try pulling the cylinder off and checking the piston rings. There should be 2. Make sure they are each in their grooves on the piston. Slowly rotate each one until they won't spin anymore (are stopped by a small piece of metal on the piston). Make sure that you can squeeze them together with your fingers against the piston. Now try to put the cylinder back over the piston. Squeeze the top ring with your fingers and slowly slide the cylinder down over it, do the same with the second one then slide the piston down against the gasket on the engine case. Now try to engage the clutch and see if it still gets stuck. If it still gets stuck it's possible that something fell into the engine case. Try taking the cylinder off and turning the engine upside down and shaking it, maybe something fell in there.
     
    #24 Tyler6357, May 9, 2013
    Last edited: May 9, 2013
  5. Ludford

    Ludford New Member

    Joined:
    May 5, 2013
    Messages:
    13
    Likes Received:
    0
    Ok so the siezing at a certain point isn't the engine. For some reason when the master link gets to a certain tooth on the engine sprocket it stops and wont go allow the sproket to turn any more.
     
  6. Tyler6357

    Tyler6357 Member

    Joined:
    Mar 15, 2012
    Messages:
    822
    Likes Received:
    12
    Actually, the more I think about it the more I think that something has fallen into the crank case (lower end) and is causing the crank to get stuck. Take off the cylinder and pull the piston up to its maximum point (closest to the head location), then turn the bike upside down and slap the engine, shake the whole bike if you have to and see if anything falls out. It could be that a piston ring broke off and part of it fell into the case, check the piston rings for any breakage, they should be totally round except for a small gap in each one. They should each be the exact same.
     
  7. Tyler6357

    Tyler6357 Member

    Joined:
    Mar 15, 2012
    Messages:
    822
    Likes Received:
    12
    Oh, ok, forget what I said---haha, It sounds like the chain is your problem, thank goodness! Try to take the master link off and put it together again. If you can't get it to stop getting stuck you probably need a new chain. The chain has to flow over the engine sprocket smoothly without getting stuck.
     
  8. Ludford

    Ludford New Member

    Joined:
    May 5, 2013
    Messages:
    13
    Likes Received:
    0
    I don't think there is anything wrong with the engine. It will freely turn without seizing with the chain off.
    The problem is that it seizes with the chain on, when the master link gets to the engine sprocket

    Should the master link clip have it's open end towards the direction of travel or away?
     
  9. Tyler6357

    Tyler6357 Member

    Joined:
    Mar 15, 2012
    Messages:
    822
    Likes Received:
    12
    The open end of master link clip should point away from the direction of the chain.
     
  10. Tyler6357

    Tyler6357 Member

    Joined:
    Mar 15, 2012
    Messages:
    822
    Likes Received:
    12
    Also, make sure the clip is not bent or sticking out in some way. If it's bent try to straighten it out with pliers or in a vice. If you have to lightly grind of the bent metal that sticks out but don't take off too much or it won't stay in place.
     
  11. Tyler6357

    Tyler6357 Member

    Joined:
    Mar 15, 2012
    Messages:
    822
    Likes Received:
    12
    If you can't get it to stop getting stuck you will need a new master link.
     
  12. Ludford

    Ludford New Member

    Joined:
    May 5, 2013
    Messages:
    13
    Likes Received:
    0
    Got the chain spinning semi freely, Went out to try and start it, wouldn't start again and my master link clip flew off and is now AWOL. That's be buggered for today then.

    Are these "420" sized chains? Need to order the right size master link.
     
    #32 Ludford, May 9, 2013
    Last edited: May 9, 2013
  13. Tyler6357

    Tyler6357 Member

    Joined:
    Mar 15, 2012
    Messages:
    822
    Likes Received:
    12
    I'm not real sure, I am using a 1/8" regular sized BMX bicycle chain that is extra strong, that I find it flows through my engine socket smoother and works better than the one that came with the kit. But I think they are 415. Sorry you lost the master link clip but it sounds like it wasn't working correctly anyhow.
     
  14. rossrider

    rossrider New Member

    Joined:
    May 6, 2013
    Messages:
    75
    Likes Received:
    0
    Yeah mine is a 415 chain, you can find them on ebay for pretty cheap brand new!
     
  15. Toadmund

    Toadmund New Member

    Joined:
    Jan 19, 2012
    Messages:
    792
    Likes Received:
    0
    The problem I have is that I used to use regular, but I have been using high octane. Why?
    Because the lower octane stuff has ethanol in it and people say that is bad for our engines.
    Damned if you do, or don't.
     
  16. Toadmund

    Toadmund New Member

    Joined:
    Jan 19, 2012
    Messages:
    792
    Likes Received:
    0
    I got a KMC HD 415 chain, problem is it's not long enough, so my brother wanted one, so we got two and split the third for links.
    We also broke two chain tools!
     
  17. LR Jerry

    LR Jerry Active Member

    Joined:
    Dec 19, 2011
    Messages:
    1,027
    Likes Received:
    0
    Toadmund, I'm blessed in that I can buy 100% gas here in my home town. When I use 100% my engine sounds like this errrrrrrrrr... When I use gas with ethanol it sounds like this erred_____erred______erred... I've got an older B&S lawn mower and the same thing happens to it as well.

    I do know the ethanol amount does vary from company to company. I'm not sure about octane grade however.
     
    #37 LR Jerry, May 10, 2013
    Last edited: May 10, 2013
  18. Toadmund

    Toadmund New Member

    Joined:
    Jan 19, 2012
    Messages:
    792
    Likes Received:
    0
    The only real solution is to shave my head.

    If I can't change the gas, I'll change the compression.
    (sometime)
     
  19. Ludford

    Ludford New Member

    Joined:
    May 5, 2013
    Messages:
    13
    Likes Received:
    0
    I'm going to have to get a new chain because this one is fowling up as it goes round the sprocket, I think one of the links doesn't turn as much as it should.

    Is there any way to tell what size chain I need?
     
  20. Toadmund

    Toadmund New Member

    Joined:
    Jan 19, 2012
    Messages:
    792
    Likes Received:
    0

Share This Page