Wanted: Master Brake Cylinder For xj550

I need to get a new master brake cylinder for my bike. The plastic to see into it has corroded all the way through. So there is really no point in a rebuild. Thanks.

 

Actually, you can replace that plastic window with a glass one:

Master Cylinder Sight Glass:


mc2) While you're rebuilding or even replacing your front master cylinder, you might as well go ahead and replace that dull, clouded, cracked thick plastic sight "window" that allows you to see the level of brake fluid in the reservoir. The original "transparent" round plastic window ages neither gracefully nor well over time, and becomes cloudy within a few years. Our replacement flat mineral glass windows are the correct size, they won't ever get cloudy, and are one of those small details that you can step back, look at, and say to yourself: "Kewl".

Okay, all that's the good news. The bad news is that the old plastic seal can be a beast to remove. Sometimes, they come out all nice and easy. Sometimes, you have to struggle, and do as that classic old Pink Floyd song suggests: "One of these days, I'm going to cut you into little pieces......". You get the idea. You'll have to fight, struggle, and then win. Clean out the edges of the bore exceedingly well, and make sure that all remaining pieces and remnants of the old window and adhesive are gone before gluing in the new window.

And while you've got that old sight window out, go ahead and dig out the thin aluminum disc that lives right behind the sight window, and which restricts the view of the fluid in the reservoir. Although this disc never wears out, it does hinder you from getting a good view of the fluid level. Again, just carefully pry it out.

Finally, you'll need a good quality adhesive to install the new sight glass into the cylinder body. Although there are probably lots of brands of gasket-maker/sealant material that will work, we've found one that is black, easy to work with, and is impervious to brake fluid (NOTE: if you're going to try to use some gasket material that you have sitting around, make DARN SURE that you test it to see whether brake fluid attacks it or prevents it from hardening (almost none of the major gasket-maker materials have been "tested" by their manufacturers against brake fluid, since you do not normally ever use gasket-sealant material in a brake system).


HCP1074 Aftermarket front brake master cylinder glass brake fluid level SIGHT WINDOW, correct size and thickness crystal-clear mineral glass. NOTE: Fits all models that have a pressed- and glued-in original sight window. Does NOT fit original master cylinders that have an o-ring and c-clip retained ight window. Each:
$ 5.95

HCP9819 Aftermarket front brake master cylinder glass brake fluid level SIGHT WINDOW, correct size and thickness crystal-clear mineral glass. NOTE: Fits all models that use an o-ringed and c-clip retained original sight window. Does NOT fit original master cylinders that have a pressed- and glued-in sealed sight window. Each:
$ 5.95


HCP3120 Aftermarket black GASKET MAKER, 3.8 ounce squeeze tube. Enough to do about ten thousand sight glasses! But it's the smallest size offered. I'm sure it works well in other applications. Each:
$ 5.50


And the rebuild kits:

Master Cylinder Rebuild Kits:

mc1) OEM and aftermarket brake MASTER CYLINDER REBUILD KITS contain all the operational parts you need to correctly rebuild your master cylinder: piston, piston seal, piston spring, piston rubber sealing boot, and retaining circlip. NOTE: the piston seal does not come pre-installed onto the piston, and at first glance, you may wonder "how the heck do you get that small seal opening over that large piston?". Well, lots of lube (brake fluid) and patience and a small, dull pry tool works wonders. Make sure that you install the seal with the flared seal "lip" facing towards the fluid outlet!

NOTE: be sure you very carefully clean and inspect your used, original master cylinder for any damage and rebuildability. If the pressed-in steel piston bore is badly scarred or pitted-rusted, then it must be honed to a silky-smooth finish before installing new components. If pits or scratches are too deep to be removed, it is best to obtain a replacement master cylinder (new or used) rather than to try to rebuild a damaged original. Remember, your life literally depends on your brakes....not always in day-to-day riding, but when it counts the most, in an emergency situation; and those always happen in the blink of an eye, and without prior warning.....

Master cylinder rebuild kits contain the piston, the piston seal, the spring, the plunger end seal, the plunger dust boot and its retaining circlip.



HCP3030 OEM master cylinder REBUILD KIT, for all XJ550 models.
$ 54.00

HCP1694 Aftermarket master cylinder REBUILD KIT, for all XJ550 models.
$ 32.00




Master Cylinder Reservoirs, Reservoir Covers and Diaphrams:

OEM and replacement brake master cylinder RESERVOIRS, COVERS AND DIAPHRAMS[/u] perfectly replace your incorrect, damaged, or corroded pieces perfectly. A new diaphram should be fitted whenever the original is damaged, or when the master cylinder is rebuilt.


HCP3037 OEM front master cylinder RESERVOIR COVER, brand new top cover plate fits and seals correctly, but no longer has the word YAMAHA in raised letters across the face. Fits all original XJ550 all models, XJ650 Maxim and Midnight Maxims, and XJ1100 front master cylinders.
$ 13.00

HCP3034 OEM front master cylinder RESERVOIR DIAPHRAM, brand new accordion style rubber diaphram fits and seals as original. Fits all original XJ550 all models, XJ650 Maxim and Midnight Maxims, and XJ1100 front master cylinders.
$ 8.00



Or you can buy brand new master cylinders:


Master Cylinders:

mc1) OEM and aftermarket complete front and rear MASTER CYLINDERS, brand new units perfectly replace the originals. Contains lid, diaphram, piston assembly, and lead wires for fluid level switch (on models so equipped). Does NOT include the brake light switch, lever, or mounting hardware. Lettering and style of the cover/lid may differ from your original.


HCP3461 OEM complete MASTER CYLINDER ASSEMBLY, brand new unit perfectly replaces your original. Comes with cover, diaphram, and piston assembly, ready to install. Hand lever, brake light switch, and mounting hardware is not included. Fits all XJ550 models. No mounting clamp is included. 14mm piston bore, horizontally level reservoir orientation, forward-facing fluid outlet port. NOTE: the HCP3015, HCP6277, and HCP1808 master cylinders listed below will fit in the same manner and style as this cylinder, but they have the larger-capacity reservoir and bigger piston bore as used on dual-disc brake models.
$ 109.00


HCP3063 Aftermarket complete MASTER CYLINDER ASSEMBLY, brand new aftemarket unit perfectly replaces your original. Comes with cover, diaphram, piston assembly, hand lever, brake light switch, mounting hardware, union bolt, and crush washer----completely ready to install. Fits all XJ550 models, although the hand lever that comes with this master cylinder will not have the proper bend orientation to match all models. 13mm piston bore, horizontally level reservoir orientation, forward-facing fluid outlet port. NOTE: the HCP3015, HCP6277, and HCP1808 master cylinders listed below will fit in the same manner and style as this cylinder, but they have the larger-capacity reservoir and bigger piston bore as used on dual-disc brake models. Please note that this cylinder uses a banjo bolt (included) that is different in thread size than all the other banjo bolts used in the brake system.
$ 89.00



HCP6277 OEM complete MASTER CYLINDER ASSEMBLY, brand new unit perfectly replaces your original. Comes with cover, diaphram, and piston assembly, ready to install. Hand lever, brake light switch, and mounting hardware is not included. Fits all XJ650 Turbo models. 16mm piston bore, horizontally level reservoir orientation, forward-facing fluid outlet port.
$ 219.00



HCP3015 OEM complete MASTER CYLINDER ASSEMBLY, brand new unit perfectly replaces your original. Comes with cover, diaphram, low fluid sensor, clamp, and piston assembly, ready to install. Hand lever, brake light switch, and mounting hardware is not included. Fits all XJ650 Seca models, all XJ700 models, and the XJ900RK Seca model. Mounting clamp is included. 16mm piston bore, horizontally level reservoir orientation, forward-facing fluid outlet port.
$ 249.00



HCP1808 Aftermarket complete MASTER CYLINDER ASSEMBLY, brand new aftemarket unit perfectly replaces your original. Comes with cover, diaphram, piston assembly, hand lever, brake light switch, mounting hardware, union bolt, and crush washer----completely ready to install. Fits all XJ650RK Seca, XJ650 Turbo, all XJ700, and XJ900RK models, although the hand lever that comes with this master cylinder will not have the proper bend orientation to match all models. This cylinder does NOT have the provision for the low brake fluid sensor as used on the XJ650 Turbo models. 16mm piston bore, horizontally level reservoir orientation, forward-facing fluid outlet port. Please note that this cylinder uses a banjo bolt (included) that is different in thread size than all the other banjo bolts used in the brake system.
$ 89.00