Noisy Gears

KMC1993
KMC1993 Posts: 101
edited August 2013 in Workshop
I have a 7 speed shimano cassette with a shimano tourney rear derailleur. The shifts are smooth but its a bit on the noisy side, with one cog in particular being very noisy. The bike is only a couple of weeks old so it should not be an issue of wear. Anyone have any advice on what I can do to reduce the noise?

Comments

  • smoggysteve
    smoggysteve Posts: 2,909
    indexing most likely, gears will now and again need a tweek especially when new. Turn the barrel adjuster on the read derailleur a qtr turn clockwise and see how things go, if its better turn a qtr more, if worse or jumps turn counterclockwise half a turn. Get the idea? Do not turn more than a half turn at a time. Try this before moving onto anything more complex as a remedy. The chain should still be pretty well lubricated from factory if its a newish bike so no need to go splashing oil over it just yet.
  • KMC1993
    KMC1993 Posts: 101
    Thanks for the reply, a lot quieter now. Its amazing what difference such a small change can make :D
  • pinno
    pinno Posts: 52,330
    Just wait a few months. Shimanooo cables are supposed to be pre-stretched at all level of spec. but it isn't true. The gears will go out of kilter when the cable does stretch. However, don't replace them as this stretching will stop and the cables will be stable, for want of a better word.
    PS Even Campag cables stretch a little, despite what they say.
    PPS Keep all the cogs n stuff clean - indexed gears don't like much dirt
    PPPS Don't break too hard when someone is wheelsucking because when he crashed into your rear mech...
    seanoconn - gruagach craic!
  • hostman
    hostman Posts: 104
    Hi,

    I have a similar issue, but only when on the small ring at the front. The gears are also swapping, i.e. going up and down and it can be difficult sometimes to stabilise it. This is with a Shimano 105 groupset.

    http://www.boardmanbikes.com/road/road_team.html

    Should I try the adjustment mentioned here also?
  • smoggysteve
    smoggysteve Posts: 2,909
    Sounds like the same fault. Does the chain rub on the front derailleur at all? If all looks ok there, try as mentioned above but start in the lowest gear when on the small ring. If all is ok after a tweek , make sure you check the big ring after. This time starting in highest gear. If you get a small amount of noise going big to big or small to small, dont worry as you woulnt really use gears in this way anyway.
  • hostman
    hostman Posts: 104
    It does catch the front derailleur when using the small gears on the cassette, normally 3rd from last, but I then click the front derailleur once and it adjusts sufficiently to stop catching.

    I've bought some tools, i.e. chain whip and locking nut tool to remove the cassette entirely, it could do with a proper clean. I''ll see about adjusting the other bits after that.

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