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Discussion in 'The Lounge' started by MTBstud12, Feb 21, 2008.

  1. MTBstud12

    MTBstud12 Monkey

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    So riding today, i hear a weird sound from my drivetrain. So I get a hold of Loco for a diagnosis from what i can describe to him. He says it sounds like 1 of 3 things. 1) A Bent chain ring ( Ive eliminated that) 2) Bent Cog or 3) Bent chain link. I don't have a stand at school with me, so I'm lost as to how to go about eye balling if i have a bent link. Theres sooo many of them...

    Any help would be appreciated. Sarcasm welcome.
     

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  2. BurlyShirley

    BurlyShirley Rex Grossman Will Rise Again

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    Step #1: rotate the cranks backward and watch for the rear der. to "pop"

    Where it pops is where the bent link is, if there is one.

    Step #2: Disassociate from loco immediately
     
  3. Wingnut

    Wingnut Turbo Monkey

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    ^^^What he said, only in reverse order.

    So, this weird sound, what does it sound like??
     
  4. MTBstud12

    MTBstud12 Monkey

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    Ummm... Like chain rub but louder, and.... stronger? like i can feel something catch in my pedal stroke through the cranks..if that makes sense
     
  5. MTBstud12

    MTBstud12 Monkey

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    Awesome

    Lol! No can do, Loco's saved my a$$ from many a bike problem
     
  6. Wumpus

    Wumpus makes avatars better

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    If shirley's idea doesn't work, you can manually bend each link until you find the tight one.
     
  7. LordOpie

    LordOpie MOTHER HEN

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    That's how I got through college.
     
  8. MTBstud12

    MTBstud12 Monkey

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    Are you sure it was links you were bending Opie?
     
  9. LordOpie

    LordOpie MOTHER HEN

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    I have absolutely no clue.
     
  10. MTBstud12

    MTBstud12 Monkey

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    So, I rotated the crank backwards, and got no distinct "pop" in my rear der. Ive gone through the whole chain(I think) and im not finding a "tight" link.

    I may be bike retarded. But this is why Im new to the game
     
  11. LordOpie

    LordOpie MOTHER HEN

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    Why not describe the sound to us?

    Maybe it's a creaky saddle? I know, weird, but oddly likely.

    Maybe it's a loose bottom bracket and you're feeling it more than hearing it?

    Maybe you're crazy and we can get n8 to confirm?
     
  12. MTBstud12

    MTBstud12 Monkey

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    ^^^^^

    Note, the sound is only heard when theres torque on the drive train. When I hold it up and spin it with my hands i hear nothing but smooth running.... AHHH
     
  13. LordOpie

    LordOpie MOTHER HEN

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    Oh right, you did describe it. Sorry, drinking yummy wine, got a half bottle into me so far.

    So yeah, maybe a ring, cog, or chain. But also maybe BB?

    Is it doing it in every gear or just a specific one?
     
  14. MTBstud12

    MTBstud12 Monkey

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    Haha! its all good.

    Umm.. Its more apparent in some more than others, more noticeable in the middle ring, upper 4 Cogs
     
  15. LordOpie

    LordOpie MOTHER HEN

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    So if Loco's analysis is right, it's probably a bent tooth on the middle ring?

    Also, I love boobies.
     
  16. MTBstud12

    MTBstud12 Monkey

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    That would suck mucho... That doesn't necessarily mean a new crank(assuming thats the problem)..does it?

    Note: Opie Likes boobs! Thank God
     
  17. ThePriceSeliger

    ThePriceSeliger Mushhead

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    Nah man. Take the middle ring off and throw in into a vice.

    Do that anyways, do that with all three rings and make sure the teeth are straight and the rings arn't bent.
     
  18. LordOpie

    LordOpie MOTHER HEN

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    Loco should be able to swap a ring and ring only. If he says a whole new crank or bike, he's upselling.


    PS: This is my Friday. I'm off tomorrow :D
     
  19. MTBstud12

    MTBstud12 Monkey

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    Rock on. He won't upsell me. He's honest. So it should be smooth sailing. Now to wait til i get home in 2 weeks. Im not going to get screwed by some snob shop in the Houston area!
     
  20. LordOpie

    LordOpie MOTHER HEN

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    Yeah, just wait and get screwed by Loco. Don't tell his wife, she doesn't share well.
     
  21. MTBstud12

    MTBstud12 Monkey

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    :monkeydance: She cant get the dancin monkey, no worries.
     
  22. loco-gringo

    loco-gringo Crusading Clamp Monkey

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    If he waits until he rolls back to town, I'll fix it and give a hug.
     
  23. MTBstud12

    MTBstud12 Monkey

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    That's the plan man. I dont wanna screw anything up, cus im capable of that.
     
  24. Wumpus

    Wumpus makes avatars better

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    Check the linkage/rearend bolts to make sure everything is tight.

    Check for burrs on the chainrings.

    Middle ring/outer cogs could also have something to do with a bent big ring.
     
  25. loco-gringo

    loco-gringo Crusading Clamp Monkey

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    I looked at this on Friday and couldn't find anything bent. I could make it pop when shifting, but it wouldn't when I wasn't. That tells me it's most likely chain or cassette. The chain was supa dry and sandy. After a good bit of lube it seemed to act better. I think Darrell was going to ride today, so we'll see if that fixed it.

    Sand = bad for drive trains. :plthumbsdown:
     
  26. MTBstud12

    MTBstud12 Monkey

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    The initial popping sound is gone, but its still go-shifting, hopping up the Cogs.