Rear Brake arm length Rm 125 1980 ( torque link)

[oldfart]

As  stated above I need the length from  brake drum arm  to frame bearing centres.

 

[Noel]

With
(tape measure, while in place on bike, ie not dead accurate,)
530mm

cheers
Noel

[oldfart]

Thank you for your reply Noel.   In comparison  Rm 125 -250 - 400 run the same torque arm length of  530mm centres.
250 & 400 are identical,  but the 125 is narrower at bearing mounts.     Mine must have a 250/400 arm with extra washers either side of bearing to make up difference which now makes sense.