Aldo, thanks for the reply!
yes, its on the Learco. I have already moved the shifter up a bit, so now i got a bit more than 1cm (1/2 an inch) clearance above the rear chainstay. i cant vary that much in order to keep all gears rideable. (Side question: was a 4-speed cluster customary in 1940? Sheldon says they started to be around not before the 50ies?)
it behaves like this: the chain returning from the rear sprocket hits the front chainwheel a bit on the side. that causes either a very loud crashing noise or a minor "jam" about every 10th crank rotation (which can be solved by backpedalling). i had similar effect with a bike converted to sinlge speed, when the chain line wasnt aligned perfectly. Might also be an issue of chain tension, is it maybe too high?
Martin Appel Munich, Germany
--- *looking for "Automoto" fork crown medals! please send mail :)
*visit the search engine for classic racing bike related stuff:
http://www.google.com/
*view my classic vintage lightweight bicycles at:
http://www.wooljersey.com/
Aldo Ross schrieb:
> What exactly does the 1/8" chain do, or not do, when you try to shift?
>
> Is this on your Learco Guerra?
I noticed in the pictures on
> wooljersey.com that the shifter is mounted too low on the seatstay.
> Compare this photo:
>
> http://www.wooljersey.com/
>
>
> ...with these two:
>
> http://www.wooljersey.com/
>
>
> http://www.wooljersey.com/
>
>
> Aldo Ross
> Middletown, OH, USA
>
> ----- Original Message ----- From: "Martin Appel" <martin@team-ware.de>
> To: "CR RENDEZVOUS" <classicrendezvous@bikelist.org>
> Sent: Saturday, April 07, 2007 10:51 AM
> Subject: Spam:***, [CR]right chain size for cambio corsa?
>
>
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>>
>> i recently aquired a cambio corsa bike. now i wonder what might be the
>> best chain to use with it? I tried a standard inexpensive 1-1/8" chain
>> since i figured that was the best match to the standard chain in 1940
>> (right?). On a testride i found the performance left to be desired, it
>> basically teft me with only one gear of 4 to use.
>> Would a 3/32" be a better fit?
>>
>> Martin Appel
>> Munich, Germany
>>
>> ---
>> *looking for "Automoto" fork crown medals! please send mail :)
>>
>> *visit the search engine for classic racing bike related stuff:
>> http://www.google.com/
>>
>> *view my classic vintage lightweight bicycles at:
>> http://www.wooljersey.com/