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 Post subject: square taper damaged
PostPosted: Fri Feb 16, 2007 12:14 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Wed Oct 05, 2005 7:45 pm
Posts: 10942
Location: kent
My left CBR crank is damaged at the taper . when I put it on a BB , there is a lot of play . I have tried to put foil between the bb and crank but that doesnt work , any ideas ??


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 Post subject:
PostPosted: Tue Feb 20, 2007 11:18 am 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
Posts: 15804
Location: near cwmcarn
classic cook bros, curse jacks name & throw it across the room ;)
any kinda shim will be a short term fix. sorry, but its SNAFU


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 Post subject:
PostPosted: Sat Mar 03, 2007 1:10 am 
Retro Guru
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Joined: Sun Feb 18, 2007 3:39 am
Posts: 2193
Location: bedford
get it aluminuim welded then machined back into a taper not cheap but worth it.


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 Post subject:
PostPosted: Sat Mar 03, 2007 6:26 pm 
Retro Guru

Joined: Wed Jun 14, 2006 3:35 pm
Posts: 420
Location: Newbury
throw it, its worth any hassle kinda hassle. you can get them £15. (dont know the make cbr though..)
they are made of soft low grade alloy, you can heat them up in a cup of boiling water, them whack it on real tight, but after a while, (if the taper is worn) it will just work loose.


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 Post subject:
PostPosted: Sun Mar 04, 2007 12:27 am 
Gold Trader
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Joined: Sat Jul 29, 2006 11:14 pm
Posts: 3832
Location: Somerset
Why I use shimano.

Cooks cranks are wonderful when new. Put 'em on and leave 'em on and dont weigh more than 12 stone and you will be fine! :wink:

Sorry, but I know of no quick fix.


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 Post subject:
PostPosted: Sun Nov 23, 2008 7:50 am 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 18207
Location: Sunny Glasgow
Re-file the end of the b/b taper to match the new angle on the worn section
You'll have to do to opposing side the same so it goes on

Sorry ,thats the only answer i can think of,offhand


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 Post subject:
PostPosted: Mon Dec 12, 2011 11:54 pm 
Dirt Disciple

Joined: Mon Dec 12, 2011 4:55 pm
Posts: 15
Location: Kettering
any repair will only be a bodge once the alloy is damaged it finished good lesson tighten your cranks amd check again after a couple of rides and retighten welding and machining not an option on forged alloy a definate future weakening and potential breaking point


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