4 cycle problem

Discussion in '4 Stroke Bicycle Engines & Kits' started by William Burger, Jul 1, 2019.

  1. William Burger

    William Burger New Member

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    I have a new 4 cycle for my bike I have a little over 15 miles of riding on it. The motor lost power and wouldn't stay running and now when I start it runs for a few sec then cuts off with a load metallic sound. The motor has had a strange smell to it from day one. Any ideas what could be going on?
     
  2. William Burger

    William Burger New Member

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    Now a new problem I can't get the pull starter cord to pull out.
     
  3. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    It sounds like your clutch locked up...

    Can you pull the pull starter with the rear wheel off the ground? (so it spins the rear wheel)
     
  4. William Burger

    William Burger New Member

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    It doesn't spin the rear will at all when I start it tell I give the motor gas
     
  5. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    How are you starting it if the pull starter cord won't pull out????????
     
  6. William Burger

    William Burger New Member

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    I'm sorry, I meant when I could start it. The back will free spins if the motor is running or not. The motor has a small trans on it that engages when you give it gas
     
  7. William Burger

    William Burger New Member

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    Sorry I mean wheel not will.
     
  8. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    Here's a crazy question... Did you fill it with oil before starting it???
     
  9. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    Also.... Post a good picture of your setup
     
  10. William Burger

    William Burger New Member

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    Yeah I did, the first thing I did was check the oil level to make sure nothing happened. The oil is still clean and I didn't see anything in the oil that shouldn't be there
     
  11. William Burger

    William Burger New Member

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  12. William Burger

    William Burger New Member

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    Don't mind the oil and crap under the bike. That's from an old 2cycle
     
  13. William Burger

    William Burger New Member

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    Ok so I pulled off the pull cord and the cover and spark plug. I can turn it by hand and I can hear everything is moving like it should be. But once I put the pull cord back on I get one good pull out off it and then it locks back up again. Does anyone have any ideas as to what's going on?
     
  14. Harry Coddington

    Harry Coddington New Member

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    Hi William, I know this is an old post but my 49cc seized-up and died after making just those same noises & symptoms. It might be dead. I had one that the motor looked exactly like yours.. Sorry.
     
  15. William Burger

    William Burger New Member

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    No worries. What I found out was one of the springs on the clutch had broke and found it's way behind the clutch and was jamming up. So the clutch wouldn't move. Hopefully it's not dead but honestly I've had a ton of problems with this motor. I'm really thinking about going back to a 2 cycle.
     
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  16. xXNightRiderXx

    xXNightRiderXx Active Member

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    Just sounds like a machine made spring that was improperly annealed. I'd get a new set of springs and then try again. If it breaks again, then there's something wrong with the clutch itself, and that should be replaced with urgency. Clutch damage will easily translate into engine damage.
     

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