Hi y'all! I would appreciate any insight or tech help on determining which component may be faulty on the 08 Vision rear linked brake setup. Mine first started a year ago after the winter storage period.
The rear brake pedal went all the way to the floorboard with no rear brake. So I thought no problem, air got into the system and needs to be bled. So I got out the trusty service manual (on CD) and bled the system using the center of the three bleeder valves on the right front caliper. Worked great! Got brakes again
No problem the rest of the riding season. Rear brake held fine.
This Spring however the rear brake system will not pump up no matter how many attempts to bleed the system. By the way there is No brake fluid leaking anywhere in the system (I checked that first).
Has anyone else run into this problem on the '08 or '09 Vision? (they changed the system in '10).
There are the three major components to the rear linked brake system - rear master cylinder, valve brake delay and valve brake proportioning. The service manual doesn't give you any info on how to test the components, it just goes through the bleed procedure.
Without any signs of fluid leakage anywhere in the system I was leaning on failure of the pressure O ring inside the rear master cylinder piston, not allowing pressure to build and hold. I don't think that the three components can be disassembled and I have not seen any "rebuild kits" for those components. I would like to avoid having to buy all three of the system components because they are fairly pricey!
Any help, insight or knowledge would be greatly appreciated! God Bless, Ride Safe and keep the shiny side up!