BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: watts on 24 Apr, 2025, 09:20

Title: M21 Speedo mount
Post by: watts on 24 Apr, 2025, 09:20
Hello

I have 1962 M21, I am not sure how the speedo mounts.  The way it is at the moment the switch is inaccessible, which in small problem but not terrible, dip and main little different so not likely to need it on the go.

However the switch touches the cable, to give it free movement the light pattern is just in front of the wheel.

Am I using the correct mounting bracket, I see others but they seem to be for girder forks.

Thank you
Matthew
Title: Re: M21 Speedo mount
Post by: neil1964 on 24 Apr, 2025, 22:05
The mounting on my 57 Competition is similar (GS yokes so no steering lock) but very similar.  I have a 'D' shaped speedo but it fits to same bracket as yours and the cable exit is in the same place (the bracket has a notch).

I've use the rubber mounts as on my DBD type mongrel (twin clocks).  The fitting bolts are longer and you have rubber bushes above and below the bracket that lift the speedo (and protect it from the shakes) and may give you enough clearance for your switch.  Both my light switches have a smaller (no 'air' between the rotating rib and the switchplate and shorter rotor too) - is your switch and original?
Title: Re: M21 Speedo mount
Post by: watts on 27 Apr, 2025, 08:34
Hello Neil

Thank you.