master cylinder

Okay I’m stumped here. Rear brakes working, pulled them off when I took the engine out. Had the fluid reservoir hanging upside down for some time. I’m assuming I introduced some air into the line as it would give me no pressure when I reassembled. So I tried… many times, to bleed the...

Hello i am new here, currently building a 81 xs650 into a street tracker. I race flat track sometimes in Miami and i got this bike a while ago. I’m trying to build a racer mainly but still have it street legal. The old owner had started the process of rear disk conversion with the 19 front mag...

Hello all, I've looked high and low for a set of matching controls for my xs 650 build. I have yet to find a clutch, brake and master cylinder along with a throttle that match. Has anyone had any success in this area they can share? As my first build I'm also unclear about the specs. needed for...

Question, For for my build, my frame (78' XS650) started off with disk rear for brakes. I now have a switched to drum (I have a drum swing arm.) I am now left with the ugly rear master cylinder mounts (see picture.) So my question to the guru's is; Are the Rear Brake Master Cylinder mounts...

Hey guys hope all is well! I have spent most of the day trying multiple things on my rear brake system on my 1980 XS650SG and have had no luck. I have recently purchased a new rear master cylinder from mikesxs and I am still having the same issue. There are no brake oil leaks and I can't get it...

We recently bought a new master cylinder for the front brake. We have cleaned both lines, rebuilt the caliper, and I have verified fluid will flow from master cylinder thru to the caliper and will run out the bleeder. With the new master cylinder however, I get ZERO feeling of "grip" or...

i bought a mikes xs slanted master cylinder several years ago. Ive never used it. Ive never opened it up and exposed the inside to air. Its been plugged the whole time. Now that im so close to finishing my build ive realized i cant use this master cylider becsuse its really meant for a dual disc...

Can someone help me identifying the front master cylinder I have on my XS2? underneath it has 2 5/8 2. The Outside diameter of the bowl is 50mm and the inner diameter is 45mm. I ordered a replacement cap and diaphragm that was supposed to be for my bike from Yambits but it was too small so I...

To begin with I understand that there are a lot of threads concerning brakes, however i'm posting because i've been attempting to fix this issue for about a month with little to no progress and have reached despiration. Both the front (dual disc) and rear (disc) brakes on my 81 xs650 special II...

I just pulled this off the '78. There's no threading for a mirror and no wiring for the brake light. I'll be looking for stock chrome parts as in chain guard and fenders or a decent fuel tank and metal tins......Standard or Special. I've also got a nice Special tach with high beam and neutral...

As part of a brake system overhaul on my 1980 Special (caliper and rear master cylinder rebuilds + new stainless steel lines), I'm looking to replace the front master cylinder with a smaller bore model. This is my first motorcycle and since the brakes were shot when I purchased the bike, I have...

Okay so I have a 1980 xs650 with a pretty much stock break setup with a single caliper/disc setup and a cheap $25 eBay 14mm master cylinder. I got the aftermarket m/c because the original 14mm Master cylinder was pretty much shot and beyond repair. Here's a picture of most of the current setup...

Sorry everyone it' s been a while since I've posted, pretty busy haha. Can I flush the lines and rebuild the mister cylinder and save it? I really don't want to have to buy a new one. Also, this is a quick pic inside the combustion chamber I think? I just feel like all that gunk isn't really...

I have a 1973 Tx650. I am having trouble finding the correct master cylinder rebuild kit. I have looked on ebay and can only find 1977 and up kits. When i looked on Mikes the kit that is supposed to be for the 72-76 kit does not match mine. I tried looking for info on here but the posts were old...

Hello guys i recently got a set of drag bars (27.5" Length, 0" Rise, 3.75" Pullback) from mikesxs for my 1981 special and began to install them. Everything was going great, I rerouted the clutch cable as seen on previous threads, I went to mount the master cylinder, but then began to run into...

I recently picked up a '77 XS650 with the factory dual-disk option, and I just replaced the brake lines with braided stainless ones. Cleaned out the fittings and reservoir while everything was apart (didn't seem too bad actually), re-assembled and everything fits nicely. I added fluid to the...

I've an old front master cylinder off a single disc 1980 SG in need of repair. The reservoir looks in a bad way apart from all the other insides and generally speaking the rest of it is bad too. I've looked on ebay and there are no decent looking used ones out there. I don't want to spend the...

I feel like I'm losing my mind... I can't get my master cylinder cap to unscrew. The master cylinder is off of the bike and off of the handlebars. I believe this is the original front master cylinder and has the round cap (versus the rectangular kind with the screws (4)). Is this reverse...

Wondering if anyone has swapped stock rear m/c for a harley lockheed style rear m/c. Thanks for the advice in advance.

Hi All, Im back (after finishing my electrical issues from another thread). I bought a new MC, SS lines, and Pads from 650 Central. I have a mityvac (vacuum bleeder) and I started to bleed my brakes. I couldnt get them to bleed at all (no fluid) so I took the banjo bold off on the MC itself...