The BSA A7-A10 Forum

Technical (topic titles must be descriptive) => Frame => Topic started by: emilios on 09.11. 2015 20:29

Title: Swingarm dimensions
Post by: emilios on 09.11. 2015 20:29
Hi guys
Im in a tribsa project..in the begginig actually..i just start to collect parts
For now i have a A10 swingarm frame,TR6 unit engine and a trident twin lead front hub and A65 or A50 swingarm
So my question is: can i fit a swingarm from A65 on A10 frame?
Did anyone did it?
i cant find the dimensions of A10 swingarm to match them with my A65 ones..
if someone can help me with A10 dimensions would have been great..
Regards

Title: Re: Swingarm dimensions
Post by: scotty on 09.11. 2015 21:15
Emilios

The A10 had two different swing arms during its production life.

The early swing arm had a brake plate anchor point on the riders left to accommodate a single sided brake hub

The other swing arm had the brake plate anchor point on the riders right to accommodate a full width brake hub

Some clever forum member did these drawings with dimensions that I found useful

Title: Re: Swingarm dimensions
Post by: Klaus on 09.11. 2015 22:01
Emilios,

yes you can fit a A65 swing arm in an A10 frame.
I did this for a new race projekt.
I can shoot some pictures tomorrow.

regards Klaus
Title: Re: Swingarm dimensions
Post by: Klaus on 10.11. 2015 12:16
As promised the pictures.
Title: Re: Swingarm dimensions
Post by: Butch (cb) on 10.11. 2015 13:27
What advantage does the A65 swing arm bring - apart from if that's all you've got?
Title: Re: Swingarm dimensions
Post by: Klaus on 10.11. 2015 15:38
What advantage does the A65 swing arm bring - apart from if that's all you've got?


I ve got this raw frame, as unfinished project with a wrong build swing arm, some years ago.
So it was easier for me to get a complete one from an A65 to fit in.
This swing arm has no silentbushes as the A10 or Goldstar.
Its like a slide bearing, simple to work with.
And much cheaper and not so hard to find like original swing arms.

Cheers Klaus
Title: Re: Swingarm dimensions
Post by: emilios on 10.11. 2015 18:40
Thanks to all for the replies..
Well if i can fit the A65 swing arm..i will
I just worry about the shocks..if they will be straight...and also if is the length is the same..
Now that i have the dimensions i will check the swing arm that i have..
My frame was too rusty and the frame numbers desapear..so i cant know which of the 2 frames i have..
But the brakes should be on the right side cause it has this spot for the rear brake cable..
So i have the late A10 frame..correct me if im wrong..
But if i will put the A65 swing arm i will still have to make changes on that cause the hub i will use is
the conical from trident..and the brakes are on the left side
Title: Re: Swingarm dimensions
Post by: jachenbach on 11.11. 2015 00:40
Emilios,
   I don't know if it would be worth the shipping to Cyprus, but I have a couple extra swingarms. Not sure of the year, but I can check if you're interested. I expect shipping from USA could be expensive, but you can have one, no charge (except shipping) if it'll help.
Title: Re: Swingarm dimensions
Post by: emilios on 11.11. 2015 18:10
Hi jachenbach and thanks for the help that u are offering..
I checked the A65 swing arm that i have but is more than 2cm longer and the shocks place again more than 2 cm closer to inside..
So i dont want to use that swing arm..the point now is that im close to buy a A10 swing arm from ebay..it will finish in 4 days..
So in case that i wont take it i will let u know..but thanks again.
Title: Re: Swingarm dimensions
Post by: A.t.d.c. 1. on 03.12. 2015 19:22
Yes .I fitted a P/U. Spitfire swinging arm to a BB33 frame ,but it was to long .I do think you would be far better getting an A10 one ..Good luck ..