BSA Owners' Club Forum

The BSA Workshop => Singles => Topic started by: DEDGE on 21 October, 2017, 15:16:36

Title: B31 stand spring
Post by: DEDGE on 21 October, 2017, 15:16:36
Hi Guys
I have just brought a new spring for the main stand the dealer assured me it was the right one (it was different to the one I took off)

Can you tell me which way round it goes hopefully I have attached a picture.

it is on a 1950 B31 plunger frame

Best regards Dedge
Title: Re: B31 stand spring
Post by: JulianS on 21 October, 2017, 16:07:32
That is for an A10. Part 67 4847.

You can see the tongue on the cross piece of the A10 stand which takes the rectangular end of the spring they sold you.

You need 65 4727.

Below from 1951/52 parts book.

Title: Re: B31 stand spring
Post by: DEDGE on 21 October, 2017, 18:39:21
Hi Julian
Thanks very much your reply and a chance to look at your great parts book. Looking at the parts list for the stand and my casting No 29-48?? it looks like I might have the wrong stand. Do you or, anybody, know what the physical differences are as the picture looks the same.

PS can you buy the parts book you use anywhere as with the pictures and numbers it's easier to see if you have the right parts fitted in the first place. Once again thanks,

Dedge 
Title: Re: B31 stand spring
Post by: JulianS on 21 October, 2017, 19:21:19
I will send you a PM look under "My messages"

The number you see maybe 29 4860 - shown in the 1948 book as stand for C10 C11, B31 B33 rigid and plunger.
Title: Re: B31 stand spring
Post by: DEDGE on 21 October, 2017, 19:55:27
Hi Julian
Thanks very much the frame is actually 1949 so the stand could be right

Dedge
Title: Re: B31 stand spring
Post by: MICKREEVES on 29 October, 2017, 07:44:48
When I bought a stand spring for my B44, there was a choice of three patterns.
I chose one at random, but Im sure any of them would have been OK.
The main criterion for a spring is the amount of stretch on the bike, and therefor the
power to hold the stand in folded  position.
Mick