Cheap Honda pattern rear master cylinder.

[stinkwheel]

Not normally one for posting stuff like this but this seemed like a real bargain.

Went onto David Silvers for a rear master cylinder service kit for my VFR750.

For fun I decided to price up a full assembly, just to see how much they were going for.

What popped up was the original ones out of stock but a reproduction master cylinder and reservoir assembly, complete for £36. A standard OE service kit comes in at £51.60!

I'd imagine this would fit a lot of other bikes too.

Arrived today, I was worried it would be a shonky bit of crap but it seems ok in the hand. I'll report back on functionality once it's fitted.

Probably Chinese, but so's a lot of stuff these days and buying it from a well known UK parts retailer with a good reputation gives me more confidence than buying it from ebay China.
https://www.davidsilverspares.co.uk/graphics/parts/43500MJ6000P_large.jpg
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[DrDonnyBrago]

I like the "draw me like one of your French girls" photography.

[Fisty]

[BillyJ]

I got one for the front master cylinder on my CB250RS through David Silver for the same reason you did

It was good enough, but I don't think the master cylinder bore was the right size for the caliper, I ended up rebuilding and then swapping back to the old one after about a year.

Good for the price though
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Had: '06 CBR125R + '01 GSF600 + '07 SPRINT ST 1050 + '80 CB250 RSA + '93 Ducati 900SS
Have: '13 GSXR-1000 + '01 CB500S
"The aryan confuser"

[FretGrinder]

I thought nobody used the rear brake?
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Yamaha MT-09

ಠ_ಠ

[Rogerborg]

[stinkwheel]

[monkeybiker]

So nobody gets problems with front brakes then?

[stinkwheel]

Fitted it yesterday.

It differs from the original in several small but significant ways which mean it's not quite a "bolt on" part.

1) The lugs on the master cylinder casting are not threaded lik the original. That means you need to find two new longer socket-head cap screws and attach it with a nut on the back.

2) The reservoir doesn't fit onto the subframe lug properly. The original one is kind of "keyed" into position on a threaded stub. The keying fouls the mounting on the pattern one. The logical solution would be to keep the original but it has a larger diameter hose-tail meaning you can't.

I landed up rotating it 180 degrees and just fitting it. It still fouls the mounting slightly but isn't going anywhere and fulfills its function.

3) The threaded portion that pushes the master cylinder piston is too long and needed cutting back.

Three fairly minor niggles. It seems to work well, bled easily and is holding pressure.

The rear calliper was suffering from chronic lack of maintainance/old age. One piston was fully seized to the extent it wouldn't come out even with compressed air. I had to clamp the other one back in and re-bleed the system to pump it out with the hydraulics. Straightforward case of 24 years worth of corrosion under the seals.

Ultrasonic clean, new seals, new boots and re-lubed pins and it's like new.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.