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Motorcycle Discussions => British Bikes => Topic started by: phil bsa b31 on July 16, 2017, 06:23:39 PM

Title: b31 gear linkage
Post by: phil bsa b31 on July 16, 2017, 06:23:39 PM

Hi trying to fit gear linkage in my 1949 bsa b31 box seems to me like a bucket of worms when I finally get the linkage in seems correct but wont change gear if I change gear on square before linkage works fine
stripped it all clean and lubricated ,any help would be good

thanks Phil

Title: Re: b31 gear linkage
Post by: chaterlea25 on July 16, 2017, 07:25:46 PM

Hi,
Set up should be the same as the M20 box shown here,
https://www.bsa-oc.com/wp-content/uploads/bsk-pdf-manager/235_SECTIONM_BSASERVICESHEETNO608.PDF


John

Title: Re: b31 gear linkage
Post by: phil bsa b31 on July 16, 2017, 08:14:55 PM

hi thanks john got those pics looks like have got it right so will have to think again was totally rusted together when I striped it will have another go more grease

Thanks  Phil

Title: Re: b31 gear linkage
Post by: chaterlea25 on July 16, 2017, 09:42:03 PM

Hi Phil,
The link length adjustment is critical to get correct
any wear in the pins,  links and so on leads to troubles
Its a while since I built one so memory is iffy??

John

Title: Re: b31 gear linkage
Post by: phil bsa b31 on July 18, 2017, 06:35:34 AM

Hi john found a circle missing on the 10th attempt so ordered one from dragonfly will resume when it arrives still plenty to do with weather nice finished most of paint just trying to get oil tank clean now been stood 50 years so everything is well dirty but its a nice project hopefully be ready next spring looking forward to riding it .
thanks Phil
ps you don't know what size screws for brass tank badges are do you  ?

Title: Re: b31 gear linkage
Post by: chaterlea25 on July 18, 2017, 10:16:05 PM

HI Phil,
Dont know about the brass badge screws? but the plastic badges take 3BA
Ask C&D Auto's

John