750 front brake master cyl

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kiwi k
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750 front brake master cyl

Post by kiwi k » Mon Jul 06, 2015 8:08 pm

Right peeps i'm pretty sure with the amount of 750's out there, that this has been solved time and time again (Yes i have tried the search button :mrgreen: ).
My dilema is i have a leaking master cyl , thought about repair kit but main housing is rough and level window is ferk'd, so i have been looking at master's on gaybay and mainly looked at Rf's but also noticed gsxr600 are sloped.
So my question is would the gsxr work with the 750 dinosaur calipers :?: , i do have plenty of working newer tokico and nissan brakes but would like to keep the 750 as standard as possible.

TFI Kiwi.

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Re: 750 front brake master cyl

Post by Kryten » Mon Jul 06, 2015 9:55 pm

Sound's like the master cylinder on mine.
I did go down the route of cleaning it in an ultra sonic bath. Cleaned it up and repainted, but when fitting what turned out to be the wrong seal kit (tip always use genuine parts) I managed to damage the cylinder. :oops:

So I gave up and sent it to Past Parts in Bury St Edmund's who did a top job of refurbishing it including fitting a new sight glass. Not cheap but cheaper than a new one , and buying second hand I would feel obliged fit a new set of seals anyway.

They also did the master cylinder on last year's Raffle Kat 8-)

Replacing with one from a newer machine will work. The main thing to look for is the bore should be the same.

Either 14mm or 5/8" I think.

I have found that with a refurbished master cylinder, braided hoses, new pads and seals; the braking is certainly as good as can be expected for a 33 year old bike
Jim

750 SZ (Not So) Skruffy Kat
1000 SZ in bits
7/11 SZ Long term
T509 Back on the road!

It was a New Day yesterday but, by God, it's an Old Day now!

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sparki
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Re: 750 front brake master cyl

Post by sparki » Tue Jul 07, 2015 7:34 am

out of curiosity what did they charge to refurb it?
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Re: 750 front brake master cyl

Post by Kryten » Tue Jul 07, 2015 7:51 am

Here's one off a 'Bus

http://www.ebay.co.uk/itm/08-14-SUZUKI- ... 41990790f2" onclick="window.open(this.href);return false;

In the USofA but fairly cheap.

Or one off a GSX-R 11 ijn the UK

http://www.ebay.co.uk/itm/GENUINE-SUZUK ... 2c66c91013" onclick="window.open(this.href);return false;


Of course if you want to go down the route of the Tea-Pot I have a master cylinder and a pair of calipers for a 600/750. They will need a clean up and new seals, but the master cylinder is not to bad.
I tried flogging them on weEvil BAY but at £25 for the whole lot nobody was interested :lol: :lol:

You'll have to wait until next week before I'm home and able to fling them in your general direction :D :D
Jim

750 SZ (Not So) Skruffy Kat
1000 SZ in bits
7/11 SZ Long term
T509 Back on the road!

It was a New Day yesterday but, by God, it's an Old Day now!

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Re: 750 front brake master cyl

Post by sparki » Tue Jul 07, 2015 9:45 am

did you see my question above m8?.... cheers
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Re: 750 front brake master cyl

Post by Kryten » Tue Jul 07, 2015 10:52 am

sparki wrote:did you see my question above m8?.... cheers
Hi sorry missed the question the first time around!

I had the full works done which was:

Vapour blasted

Satin Black powder coat

Replacement sight glass

Cylinder bored and lined with a stainless steel insert

New Seals

Fully tested

If I recall correctly it came to about £90 which sounds a lot, but you pretty much get a new master cylinder back, and as I said with mine the start of the bore was damaged :roll: and I had pretty much written it off as scrap. The Raffle Kat was in a pretty poor condition and I didn't fancy leaving such an important item to chance.

When I came to bleed up the brakes they were absolutly spot on with no issues. Sure compared to the SpeedTrip they're not brilliant but for '80s brakes using both front and back they scrub the speed off good enough (from 60mph obviously)

Raffle Kat before

Image

After

Image

Image
Jim

750 SZ (Not So) Skruffy Kat
1000 SZ in bits
7/11 SZ Long term
T509 Back on the road!

It was a New Day yesterday but, by God, it's an Old Day now!

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Re: 750 front brake master cyl

Post by sparki » Tue Jul 07, 2015 12:47 pm

cheers jim - appreciate the info. thats not completely ott imo... scrap to perfect :)
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kiwi k
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Re: 750 front brake master cyl

Post by kiwi k » Tue Jul 07, 2015 2:31 pm

sparki wrote:cheers jim - appreciate the info. thats not completely ott imo... scrap to perfect :)
I agree considering the amount of work to restore to such a high standard

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Re: 750 front brake master cyl

Post by Kryten » Tue Jul 07, 2015 3:12 pm

kiwi k wrote:
sparki wrote:cheers jim - appreciate the info. thats not completely ott imo... scrap to perfect :)
I agree considering the amount of work to restore to such a high standard
They advertise in pretty much all the magazines and seem to specialise in the Flat Cap Car Brigade market.

http://www.pastparts.co.uk/" onclick="window.open(this.href);return false;

Worth giving them a ring to find out their current prices.

Let me know if you are interested in the Tea-Pot master cylinder
Jim

750 SZ (Not So) Skruffy Kat
1000 SZ in bits
7/11 SZ Long term
T509 Back on the road!

It was a New Day yesterday but, by God, it's an Old Day now!

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Re: 750 front brake master cyl

Post by sparki » Wed Jul 08, 2015 9:12 am

What about the mirror mount?
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