Reproduction Kawasaki - Complete Brake Master Cylinder - Use On Honda Too! - 15.8mm

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This is a reproduction of the Kawasaki brake master cylinder found on the Z1, KZ900 and other bikes. It's a complete master cylinder and lever assembly. You can also use it one any of the 70's Honda's with single or dual disc front brakes. Just flush your hoses, bolt it on, connect the brake hose, add fluid, bleed and then stop like you mean it. At this price it's practically cheaper to replace the whole thing rather than fixing parts of the original. It really looks nice having a new one of these on your bike. It obviously looks a little different from the original Honda master cylinders but as you can see in the photos, it still looks really nice! You can use this for just about any vintage bike application.

Note: The lever and pivot bolt don't come installed, apply some grease to the pivot bolt sleeve and the end of the piston on the master cylinder, then install the lever.

For those of you who have rebuilt a master cylinder that's seized up after sitting for 30 years, we don't have to tell you how much time you'll save buying a new master cylinder!

This does not come with instructions, so please be informed about how to install a new master cylinder, or have a professional do it.

For use with M10 x 1.25 banjo bolt which is the standard size for most all Honda, Yamaha, Kawasaki and Suzuki's. We carry a variety of brake fittings and banjo bolts.

The mirror mount threading fits standard 10MM mirrors.

This master cylinder does not have a hydraulic brake switch built in but we have one available here.

15.8mm piston bore size. Here's a helpful article about front master cylinder ratios. We also carry a version of this master cylinder with a silver lever and a 14mm piston which was the stock size on the Honda's with a single disc.

Can be used in place of Honda OEM part numbers: 45500-341-771, 45500-369-671, 45500-445-632, 45050-413-671

Can be used on Honda:

CB350F - 1972-1974
CB350G - 1973
CB360T - 1975-1976
CB360G - 1974
CB400F Super Sport - 1975-1977
CB450K - 1970-1974
CB500K - 1971-1973
CB500T Twin DOHC - 1975-1976
CB550F Super Sport - 1975-1977
CB550K - 1974-1978
CB650 - 1979-1982
CB650C Custom - 1980-1981
CB650SC Nighthawk - 1982
CB750A Hondamatic - 1976-1978
CB750C Custom - 1980-1982
CB750F Super Sport - 1975-1982
CB750K - 1969-1982
CB900F Super Sport - 1981-1982
CBX - 1981-1982

and many others....use it on any single or dual disc brake set up on just about any bike.

Fits Kawasaki:

KH400 A3-A5
KZ400 A1/A2/D/D3/D4
H1 500/B/D/E/F
KH500 A8 
KZ650B1/B3
H2 750 A/B/C
KZ900 A4/A5
Z1 900

and others . . .

8 Reviews Hide Reviews Show Reviews

  • 5
    Master cylinder

    Posted by Stevey on 1st Jul 2022

    Works great.

  • 5
    Good break

    Posted by Robert schiffer on 26th Oct 2020

    Good break

  • 5
    I hate rebuilding MC's

    Posted by David on 26th Nov 2018

    This is a great MC for just a little more than the cost of a rebuild kit.

  • 5
    Perfect fit

    Posted by Rusty F on 24th Sep 2018

    Used on 78 550 as I refreshed front brake system on my bike

  • 5
    Fixed the poor braking issy

    Posted by Unknown on 24th Aug 2018

    Great piece!! But someone should make it better known that there is an available pressuer switch for the brake light.... I almost didn't buy this because of my bike having a switch activated off contact with the lever instead of brake line pressure.

  • 3
    15.8 vs 14 mm

    Posted by Steve Clark on 31st Mar 2018

    Not a review but a comment, Honda's GL500 single disc brake used a 15.8mm master cylinder while the duel disc GL500I used a 14mm one.I didn't try either one yet but had to give a rating so went with average.

  • 5
    Great mastercylinder

    Posted by terry dean on 6th Jul 2017

    Picked this up to replace the beat ass stock unit on my KZ750 twin, love it!

  • 4
    Master Cyl.

    Posted by Alex Mclean on 3rd May 2016

    Seems to work at low cost......