rear mastercylinder

[sandman]

recently purchased a 88vr and rear brake was dragging and pedal was mushy. Cleaned up pistons and reinstalled. Now need a mastercyl rebuild. Is there a upgrade to mstrcyl? perhaps a gen2 they are very cheap on ebay. thanks sandy

[venture83_98]

I had a royal star master cylinder on the rear of my '83. The brakes were delinked so i dont know if it would work on the linked brakes or not. I did have to use spacers to get it centered over the pushrod on the pedal. Another issue I had was the fitting for the line. The 2nd gen master had a threaded fitting into it, not a banjo bolt. I had to get the 2nd gen line also, which way too long. I had it looped to take up the extra line. I also replaced the '83 resiviour with a plastic one off of another bike and moved it to the back of bike, getting it away from the engine heat. It all worked, but it was ugly.....

[sandman]

thanks for reply Venture83; I guess there isnt a upgrade for genI's. My bike isnt linked. but does have a proportion valve on back of mastercylinder I think. Rebuild kit is $40. Cant order anything till monday. sandy

[dingy]

thanks for reply Venture83; I guess there isnt a upgrade for genI's. My bike isnt linked. but does have a proportion valve on back of mastercylinder I think. Rebuild kit is $40. Cant order anything till monday. sandy

 

Pretty much same answer as Venture 83_98 gave you.

 

I have both rear masters and the RSV is similar in appearance to a 1st gen, but would be a stretch to get it to fit up and working. Picture of RSV rear master attached.

 

Is your rear brake line running to the proportioning valve on rear master? If it is, you really should disassemble proportioning valve & take all the valve components out of it, so you get good flow to rear caliper. Remove spring and brass plunger shown in 2nd picture.

 

Gary