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Rebuild or buy used?

W

wymple

Forum Sage
Past Site Supporter
Apparently my rear master cylinder on my 81 850G is being a problem. I'm wondering if the rebuild kits are worth the trouble. I can buy a used replacement easy enough.
 
I'd look inside the bore to see if there is any pitting. If no, I'd order up a factory Suzuki (NOT K&L) master cylinder plunger kit and replace the brake line. If the master cylinder is pitted, I'd buy a used one with a good bore, it may take more than one purchase to find a good one, and then order the new kit for the inside. Last thing I'd do is purchase some used brake master and just blindly install it.
 
I wan't afraid of a used one because, quite frankly, I've never, ever had a bad rear master on anything. I like the rebuild idea because I like new parts. I will take your advise, tho, for sure. Over at BikeBandit the thing I want listed under OEM would be the cup set?
 
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Part# 69600-45820 Piston and cup set.

Bike Bandit is expensive. Part Outlaw is cheaper although slower.
 
Just overhauled my front master cylinder. Found the bore was pitted so I had a brass sleeve put in it. Works great and a permanent fix.
 
Nessism said:
I'd look inside the bore to see if there is any pitting. If no, I'd order up a factory Suzuki (NOT K&L) master cylinder plunger kit and...
Click to expand...
Uh oh. I have one of those kits. You mean it's 2016 and K&L brake kit parts aren't acceptable, don't fit or work? What's the deal? Wouldn't this be known safety issue to them by now? Would appreciate hearing your experience and opinion.
 
On two different occasions I've experienced K&L brake caliper piston seals that fit so poorly (too tight) the piston wouldn't move like it should. Also, I had a master cylinder kit where the metal plunger would scrape inside the bore creating drag and create a squeak noise. I was able to save it by chucking up the plunger in my drill press and truing up the plunger and remove some runout using a file but why should anyone have to deal with that? The OEM Suzuki parts are the same price or sometimes cheaper than K&L brake parts anyway.
 
There is a hole in the bore behind the brass nipple the fluid line from the reivoir hooks to. Take off the nipple and be sure that bleeder hole isnt clogged too.
 
Seems like K&L is using a higher quality supplier for their brake master cylinder kits. I just rebuilt my rear master cylinder with the K&L parts kit, and it works smoothly. Parts looked oem, and different than how I remember the old kit parts. Qualified recommendation here...
 
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