Chain pop on my El Mar- Mtbr.com
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  1. #1
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    Chain pop on my El Mar

    Any ideas what would cause my chain to pop radomly on my el mariachi. I just built it up and the chainline measured up just fine but for some reason the chain randomly pops. cant figure it out. maybe the alternators flexing?

  2. #2
    surly inbred
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    Condition/age of chainring, cog & chainring?

  3. #3
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    Its a new chain and drive train.

    Sent from my Galaxy Nexus using Tapatalk 2

  4. #4
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    Is it a new or used frame? Check for cracks, maybe the rear is flexing.

    EBB or alternator dropouts? If alts make sure they're both in the same position.

    Also check the chain for stiff links, and check the rings for bad teeth.
    Negative rep, please.

  5. #5
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    Its brand new. I'll check the alternators.

    Sent from my Galaxy Nexus using Tapatalk 2

  6. #6
    Just Ride
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    Does it pop only under heavy load i.e. while climbing, or JRA as well?

    I had my bike converted for a few months this past summer to check it out and it would pop with the tensioner I used. I discovered that the chain wasn't grabbing enough teeth on the rear cog. Not sure your exact situation, may be something to look into?
    SS ==> Nut up or Shut up!

  7. #7
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    It usually pops when I start pedaling after coasting for a bit

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  8. #8
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    How many rides have you put on the chain? Forgive me if this sounds stupid, but perhaps its just stretching a bit?

    I have an El Mar and started with two new chains in the Spring and both of them made noise for the first couple of rides.

    Good luck!

  9. #9
    333
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    check your chainline.

  10. #10
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    Quote Originally Posted by 333 View Post
    check your chainline.
    ^^ This, if your chain line is off the chain lingage might be riding up on either the cog or chain ring. The popping you are hearing might be the chain hopping off the chain ring or cog before it falls back on.

  11. #11
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    If your chainline is good and your drivetrain is new, look at your freehub (assuming you're using a freehub). Maybe it's spent and the pawls are not engaging properly.

  12. #12
    veinte nueve pulgadas
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    ditto

    I have that condition on my ti soft tail. I attribute it to frame flex, and/or varying chainstay length. Maybe I'm nuts. My latest attempt to minimize the pop involved incresing the engagement. I went from 34x19 to 36x21. So far, it seems to have helped. Still get an occasional small pop. Not enough miles on it to rule conclusively.

    Set was: Ti HBC Ring, Chris King Cog, SRAM PC830
    New Setup: Ti E|P Ring, HBC Cog, SRAM PC830

  13. #13
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    I've had this happen, too, and was driving me crazy, as I'd already checked the chainline multiple times. Turned out to be the KMC quick link. The two little nubs that stick out was hitting the bash guard. Faced it the other way and the problem was gone.

  14. #14
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    One bike I had did this when the chain was too tight, make sure it's "just right".

  15. #15
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    tight chain and stiff chain pin usually are the culprit

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