BSA Owners' Club Forum

General => The Star and Garter => Topic started by: TIGER on 04 May, 2017, 21:43:09

Title: HELP C15 seat
Post by: TIGER on 04 May, 2017, 21:43:09
Hi people not a happy chapy.
 Cannot get the seat to look correct.
Bike been on the bench for months when on the floor seat is impossible to get in line !
I may have the wrong seat.
Would a Bantam seat cause this problem.
Help and advise much appreciated.
NB WHEELS LINE UP WELL.
Fed up
         Tim
Title: Re: HELP C15 seat
Post by: JulianS on 05 May, 2017, 10:04:06
I think Bantam seat brackets are different to C15, the front welded on one sticks out at the front and the C15 does not.

The bolt on brackets are also different.

BSA listed the same seat cover for both bikes.
Title: Re: HELP C15 seat
Post by: TIGER on 05 May, 2017, 12:39:18
Thanks Julian
The truth is probably a damaged frame.
So not sure how to proceed yet.
I am guessing at the rear of the top frame 1/2 inch out.
Tim
Title: Re: HELP C15 seat
Post by: JulianS on 05 May, 2017, 14:17:07
You know the plan view of the rear section is not symetrical?
Title: Re: HELP C15 seat
Post by: TIGER on 05 May, 2017, 15:53:17
I did not !
Thanks Julian.
Title: Re: HELP C15 seat
Post by: TIGER on 05 May, 2017, 16:08:27
Further to the seat problem.
The seat that came with parts original bracket was about 4 inches too far forward to
Fasten onto the top shocker pins.
I made a new bracket to fit and slotted the mounting holes to allow adjustment.
However left rear side of under seat is hard against the bike top frame and would need to
go further in that direction top be central ??
Tim
Title: Re: HELP C15 seat
Post by: JulianS on 05 May, 2017, 17:01:09
Plan view of C15 frame from factory servcie sheet 710X below, you can see the offset.

It is worth doing a internet seach on BSA C15 seat and compare the images with what you have, a solution may then be apparent.

Image from a 1966 magazine road test.
Title: Re: HELP C15 seat
Post by: TIGER on 06 May, 2017, 00:02:24
This is great using the plan view my frame is correct!
I will try to modify my seat to fit.
I will post update soon.
Many Many thanks Julian