The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: ellis on 08.09. 2017 20:59

Title: A10 Gearbox speedo drive
Post by: ellis on 08.09. 2017 20:59

Can anybody help as I have to replace the speedo drive bush as the thread has gone to connect it to the cable. I cant seem to find anybody who lists the rubber seal that fits on to it. A part number will be a great help.   *????*

ELLIS

Title: Re: A10 Gearbox speedo drive
Post by: JulianS on 08.09. 2017 21:35

Presume it is the zinc alloy bush? You can use a suitable O ring in place of the square rubber seal.

Title: Re: A10 Gearbox speedo drive
Post by: ellis on 08.09. 2017 21:39

Hi JulianS
That's a thought, I will try that when my new bush arrives.

Cheers
ELLIS

Title: Re: A10 Gearbox speedo drive
Post by: Slippery Sam on 09.09. 2017 17:49

Triumph part 57-0948 works fine
I got mine on eBay for £2.88 each!
They are a complete nightmare to fit mind.  It's a hard job to compress the square section o ring so it doesn't get chopped off.  I ended up making a sort of small version of a piston ring compressor from a hose clamp and strip of copper.
From this experience I too would recommend a standard o ring as long as it's chunky enough.
Ps - mine is brass same as the non o ring one and not sink alloy as I'd expected.

Cheers raymond

Title: Re: A10 Gearbox speedo drive
Post by: ellis on 09.09. 2017 18:07

Thanks Sam, I have one on order.   *smiley4*

ELLIS

Title: Re: A10 Gearbox speedo drive
Post by: duTch on 09.09. 2017 23:09

 Maybe use some rubber or silicone grease on the 'O'r ring to get it in easier..

 For future reference, decent bearing sellers usually stock an array of 'O' rings.

Title: Re: A10 Gearbox speedo drive
Post by: ellis on 10.09. 2017 08:27

 Thanks Dutch, I will give it some rubber grease.  *smiley4*

ELLIS