There is a sub-assembly for the master cylinder at partzilla:I can’t get the rear brakes bled. I have pumped and held the peddle many times according to the service manual.Is there a rebuild kit for the master cylinder? Or is the caliper shot? The plunger in the caliper will not move.
Has this 300 been moded with rear hydraulic brakes ? Or, are you talking front brakes ? Because the trx fourtrax 300 has rear cable brake operated, however.... they should have factory with hydro disk....just my 2 ...I can’t get the rear brakes bled. I have pumped and held the peddle many times according to the service manual
I see by your other post (battery charge issue) this is a 300 ex .