K75S front brake master cylinder

[The Grey One]

My 1989 K75S front brakes could do with a overhaul. I would like to start with the master cylinder as despite repeated bleeding it just does not feel right. There is also the suspicion of a fluid leak, so slight it is hard to be sure. Anyway being forgetful (it's an age thing) I have come back to the UK for a few weeks without checking for any markings that might identify the cylinder. Motorworks list a repair kit for a 13mm cylinder. Does anyone know if this was the standard size for this bike?

John

 

[MikeP]

Yes. 13mm. The 20mm was introduced with the 16v models.

No matter what you do to the brakes, braided hoses, better pads etc, the weakness in the single piston calliper set-up is the small diameter of the master cylinder piston. The brakes work fine, they just always seem to have a soft feel at the lever.

 

[The Grey One]

Yes. 13mm. The 20mm was introduced with the 16v models.

Thanks