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Date: 11 Aug 2007 19:28:09
From: barret bonden
Subject: Bike "skips" every 3,4 or 5 peddles
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Picked up an older Fuji Monterey with a Suntour 7 derailleur. Bike "skips"
every 3,4 or 5 peddles. Gears look OK, no missing teeth, but it feels like
a tooth or two is absent when it skips - you get a sudden jerk down on the
peddle - anyone with the cause ? (and solution ! ) many thanks -
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Date: 12 Aug 2007 22:10:48
From: Sir Ridesalot
Subject: Re: Bike "skips" every 3,4 or 5 peddles
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On Aug 11, 7:28 pm, "barret bonden" <supp...@networks-cc.com > wrote:
> Picked up an older Fuji Monterey with a Suntour 7 derailleur. Bike "skips"
> every 3,4 or 5 peddles. Gears look OK, no missing teeth, but it feels like
> a tooth or two is absent when it skips - you get a sudden jerk down on the
> peddle - anyone with the cause ? (and solution ! ) many thanks -
Hi there.
Take a very careful and very close look at all of the sideplates on
the chains links. What you are looking for is a sideplate that has
come slightly off the rivet holding it together. I had a 7 speed chain
on an old Miele, that I bought from a seller on Ebay, that did exactly
what you are experiencing. Close examination of each chain link showed
one sideplate that had just begun to separate. The plate was
completely off the rivet but had not widened enough to fail. I was
very lucky to catch it when I did.
Good luck and cheers from Peter
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Date: 12 Aug 2007 00:32:50
From: Tom Kunich
Subject: Re: Bike "skips" every 3,4 or 5 peddles
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"barret bonden" <support@networks-cc.com > wrote in message
news:aCrvi.1547$IJ4.1393@newsfe12.lga...
> Picked up an older Fuji Monterey with a Suntour 7 derailleur. Bike
> "skips" every 3,4 or 5 peddles. Gears look OK, no missing teeth, but it
> feels like a tooth or two is absent when it skips - you get a sudden jerk
> down on the peddle - anyone with the cause ? (and solution ! ) many
> thanks -
Things to check:
1) Chain has hard spots - rust will cause links to freeze. If that's
happened just twist the links loose and lube the chain. Replace as soon as
practicable.
2) Rear derailleur improperly adjusted. If you had a nice electronic rear
derailleur like some nutcake here envisions it would automatically adjust
itself. But since there is no such thing all you need to do is take it to
someone that knows how to clean and adjust the shifting and you'll be fine.
3) Since your Suntour probably has a freewheel, it's possible that the dog
clutches in the freewheel (another one of those things the nutjobs here
don't understand) are sticking in old hardened grease. The freewheel could
be disassembled in a shop, cleaned and lubed if that's all that's required.
IRC is presently making some really nice freewheels but you probably want
something a lot cheaper like the Taiwanese company that purchased the
Suntour name presently makes. They are quite serviceable though the ratios
are a bit wide for my tastes.
My bet is on 1).
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Date: 11 Aug 2007 22:07:10
From: samson
Subject: Re: Bike "skips" every 3,4 or 5 peddles
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In article <Sysvi.13676$rR.1868@newsread2.news.pas.earthlink.net >,
cyclintom@yahoo. says...
> "barret bonden" <support@networks-cc.com> wrote in message
> news:aCrvi.1547$IJ4.1393@newsfe12.lga...
> > Picked up an older Fuji Monterey with a Suntour 7 derailleur. Bike
> > "skips" every 3,4 or 5 peddles. Gears look OK, no missing teeth, but it
> > feels like a tooth or two is absent when it skips - you get a sudden jerk
> > down on the peddle - anyone with the cause ? (and solution ! ) many
> > thanks -
>
> Things to check:
>
> 1) Chain has hard spots - rust will cause links to freeze. If that's
> happened just twist the links loose and lube the chain. Replace as soon as
> practicable.
>
> 2) Rear derailleur improperly adjusted. If you had a nice electronic rear
> derailleur like some nutcake here envisions it would automatically adjust
> itself. But since there is no such thing all you need to do is take it to
> someone that knows how to clean and adjust the shifting and you'll be fine.
>
> 3) Since your Suntour probably has a freewheel, it's possible that the dog
> clutches in the freewheel (another one of those things the nutjobs here
> don't understand) are sticking in old hardened grease. The freewheel could
> be disassembled in a shop, cleaned and lubed if that's all that's required.
> IRC is presently making some really nice freewheels but you probably want
> something a lot cheaper like the Taiwanese company that purchased the
> Suntour name presently makes. They are quite serviceable though the ratios
> are a bit wide for my tastes.
>
> My bet is on 1).
You might also check for chain stretch. That can throw adjustments
off too.
S.
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