Hot ticket for the rear brake master cylinder

[EE]

Hey guys helping a friend and his rear master cyl is frozen does anyone make a rebuild kit anymore i know they were getting scarce a while back. Ed

[DesmoDrew]

https://yambits.co.uk/advanced_search_result.php?keywords=RD400C+Brake+Master+Cylinder+Repair+Kit+Rear&search_in_description=1&osCsid=7ptodo45uph6os7t06bo13hqo2

[paul1478]

IF i recall correctly and your looking for a RD400, Chuck says a FJ one works. If I recall correctly...

[SoCal250]

Ed,

Since the OEM RD400 rear kit (1A1-20000-50-00) is NLA from Yamaha here are the options:

1.  Economy Cycle OEM kit
2.  Economy Cycle repro kit

3.  OEM substitute: Yamaha 2YK-W0042-50-00 (from FJ1200, Wolverine, etc.)
    (For a RD400 you can use the spring and rubber parts, but not the piston)

4.  If you need the piston then the one mentioned above by DesmoDrew is one to get

[Plasticman]

This needs to be written up and put in the Tech section for all to reference.

[SoCal250]

This needs to be written up and put in the Tech section for all to reference.

Done

[1976RD400C]

I've used the Yamabits kit on a couple and they worked out ok. Their kit comes with all the internals including the piston.