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Technical & Reference Section => Tech and Restoration => Topic started by: Andy68 on April 05, 2011, 10:59 PM

Title: Before I smash it up........
Post by: Andy68 on April 05, 2011, 10:59 PM: :uglystupid2: I'm sure it wasn't this frustrating 30 years ago............. :tickedoff: Why the feck am I getting a mega tight and slack spot in the chain?? Everything seems nice & smooth until I fit the chain then it seems to end up running like a bag of nails................
Title: Re: Before I smash it up........
Post by: sid1972 on April 05, 2011, 11:03 PM: new chain?

what crank set up are you using?

whats the alignment look like?
Title: Re: Before I smash it up........
Post by: hunterdubber on April 05, 2011, 11:10 PM: Chain device pressed the pin in too tight and you haven't flexxed it side ways to free it ?

Bent Chain ring ?

And poor alignment Chainring bent it towards crank arm where the bolt that fixes it to the arm

Wrong top hat washer
Title: Re: Before I smash it up........
Post by: BENDYCAT ELEVENTEEN on April 05, 2011, 11:16 PM: one thing that drives me mad every single ride is a slack then tight chain as you turn the crank >:(

this to take into account

chain has a tight link or split link not running smooth over the freewheel

chain ring in not in center by a couple of mills and throwing it out

freewheel is not centred and has a couple of mill to one side throwing it off

one piece crank is slightly off in line when bb nuts ar done up - screw thread throwing it out as the turning circle dips on one end

i just don't know what it is and it drive me mad as F'ing well

cheers B ;)
Title: Re: Before I smash it up........
Post by: Andy68 on April 05, 2011, 11:18 PM: Cheers chaps........I'll check alignment etc 2moz when I've calmed down and have another look. '83 GT, Sugino 1 piece crank, mirage disc and Pete's Precision sprocket, Ukai with Dicta freewheel and Izumi chain. Must say the chain looks mega close to the seat stay too...........
Title: Re: Before I smash it up........
Post by: mattfx81 on April 05, 2011, 11:27 PM: Ive had chainrings that were badly machined do this to me twice.

Matt
Title: Re: Before I smash it up........
Post by: BENDYCAT ELEVENTEEN on April 05, 2011, 11:28 PM: I think we all get it happen at some point setting up a bike and it bugs the hell out of yer >:(

but know one has found out what it is yet and how to solve it :knuppel2:

best to have a coffee or beer and come back later when yer off the boil ;D
Title: Re: Before I smash it up........
Post by: oldschoolfool on April 06, 2011, 11:43 AM: best to have a coffee or beer and come back later when yer off the boil ;D
[/quote]

x2 ,works every time :daumenhoch:
Title: Re: Before I smash it up........
Post by: Andy68 on April 06, 2011, 12:15 PM: Could do with going home now and having a little fettle with it outside in the sun rather than sat here working my fingers to the bone!! ::) 8)
Title: Re: Before I smash it up........
Post by: ED209 on April 06, 2011, 12:48 PM: SMASH IT.....SMASH IT NOOOOOW
Title: Re: Before I smash it up........
Post by: The VW Doc on April 06, 2011, 01:05 PM: Are you using one of those 90's Boi-pace chainwheels??

Nor much help - I'll get my coat!
Title: Re: Before I smash it up........
Post by: Andy68 on April 06, 2011, 02:46 PM: May smash it all up apart from the the lurrrvely Elina combo!!! :2funny:

As for the chainwheel it's prob oval now after 30 yrs!!! Did ya sell me a 'dog' Pete??? :P