Clutch master cylinder 2008 EC 300 AJP - mineral oil
 

Problem

Clutch lever distance varies during ride. It gets from little to a lot of free play...heat related I don't know??
If adjusted to normal play when play gets huge, then it auto corrects, and can get zero play and some clutch slippage.
So non consistent action.

What's the case for this behaviour?

Thinking its in need of new seal kit, but next problem is, part list says BT27722208 seal kit. But this is for AJP DOT4 type.

I can't find seal kit for AJP mineral master cylinder. The whole master cylinder code is BE250522009.

Cluth plates are new, behaves the same as with old plates.

A better option would be to replace the AJP with a Magura.