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 Post subject: Freewheel skipping
PostPosted: Thu Sep 13, 2012 10:58 am 
Retro Guru

Joined: Tue Dec 21, 2010 6:31 pm
Posts: 1112
Ello,

I just finished one of my builds, got everything together and took it for
a test ride.
I found that the derailleur skips around the third smallest sprocket.
It's a maillard freewheel, 6 speed, a KMC chain, and a Nuovo Record drivetrain.
Crankset is Sugino. FW is NOS, chain was ridden for not more than 200 or so kilometers.
The skipping only happens with the 3rd smallest sprocket, the others all seem fine. It happens when I'm in either chainring, and only when actually riding the bike.
It's a bit like what you get with a badly set up indexed derailleur, the chain jumps from side to side and even shifts to the next sprockets sometimes.

I thought it might be due to a badly made individual sprocket (though there's not much visually wrong with it).

Any other ideas, I've had a pretty good look and can't seem to find any other likely causes.

Cheers,

Johnny


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 Post subject:
PostPosted: Thu Sep 13, 2012 11:05 am 
Retro Guru

Joined: Tue Dec 20, 2011 2:49 pm
Posts: 276
frayed cable? Bent mech hanger? dirty cable guide?

I'd check those three, it sounds a bit like the ghost shifting you describe with indexed.


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 Post subject: Re: Freewheel skipping
PostPosted: Thu Sep 13, 2012 2:33 pm 
Retro Guru
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Joined: Wed Apr 25, 2012 2:08 pm
Posts: 2185
Location: Shrewsbury
Johnsqual wrote:
chain was ridden for not more than 200 or so kilometers.


It would still be worth checking each link to see if you have a stiff :shock: one. Skipping is usually the chain.


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