XS650B master cylinder rebuild Q's

[scott s]

Tell me about rebuild kits for the XS650B master cylinder.


In the M/C for my '75 XS650B, I can move the plunger with compressed air and I can squirt brake cleaner through it. The plunger doesn't return on it's on, though. I see in the diagrams there's a spring in there....maybe my spring is stuck or??
It looks like I need to remove a snap ring or circlip and pull out the plunger assembly.

I know it's the same as several early RD models (75-76 XS650, 72 XS2, 73-74 TX500, 74 TX650, 76-78 RD400, 73-75 RD350, 73-75 RD250) and is part #1A0-W0041-00-00.
I also found one for a 1976 RD200 1979 RD400 1980 TZ250, Part #: 535-W0041-10. Is this the same kit?

Maybe there's a 2 stroke site out there that details the rebuild of this early style M/C?

 

[KevC]

MikesXS sells special circlip pliers for reaching that circlip at $10 m/c circlip pliers
Master cylinder rebuild kits are available from 650Central but they are nearly $80
650central

1975 front brake m/c diagram
part # for a repair kit is 360-20000-20-00 and fits these models

TZ750A - 1974
TX650A - 1974
XS650B - 1975
XS650C - 1976
XS2 - 1972
RD250 - 1973
RD250B - 1975

 

[inxs]

- 535-W0041-10 is not the same kit

- i have an XS2 Supplementary Manual that runs you through it, also an XSB Manual

 

[inxs]

- look here

 

[scott s]

Thanks guys, especially Inxs for that link. I actually have a set of snap ring pliers but they're about thiiiiis much too short. Need to pick up a longer pair.

 

[SPEIRMOOR]

I have the same problem finding a rebuild kit.Can anyone confirm that this is the correct kit part #1A0-W0041-00-00

 

[inxs]

1A0-W0041-00-00
XS650B - 1975
Assembly: FRONT CYLINDER KIT, MASTER (360-200 (SKU: 1A0-W0041-00-00)


APPLICATIONS

*
RD250B 1975 250 RD250 Street
*
RD350 1973 350 RD350 Street
*
RD350A 1974 350 RD350 Street
*
RD350B 1975 350 RD350 Street
*
RD400C 1976 400 RD400 Street
*
RD400D 1977 400 RD400 Street
*
TX500 1973 500 TX500 Street
*
TX500A 1974 500 TX500 Street
*
TX650A 1974 650 TX650 Street
*
TZ125G 1980 125 TZ125 Road Racer
*
XS500B 1975 500 XS500 Street
*
XS650B 1975 650 XS650 Street
*
XS650C 1976 650 XS650 Street

- try here

 

[SPEIRMOOR]

Why is this kit so expensive I wonder?

 

[curtis]

I've got the same problem. I'm wondering, is there a different front master cylinder that will swap on for a more reasonable price?

 

[XSLeo]

Mike's has several cheaper than the $80 repair kit.

 

[curtis]

Mike's only carries rebuilds for the newer (77-84) kits or his replacement master cylinders. I've got the older round type master cylinder.

I'm wondering if there is a later model Yamaha master cylinder that will work with the XS brake line fittings?