Fit a GSXR 750 K1?
It should do. The things to check are …
- The handlebar thickness is the same.
- The hose(s) will banjo into the cylinder in a slightly different position … hopefully, you’ll have enough slack in the brake hose to reach.
I have a couple of R1 Brembo radial master cylinders that I’m going to fit to my old Blade and my ZX12R, so these are the things I’ve had to consider, to get them go on my bikes. I’ll let you know how I get on when I get around to spending a few hours in my garage.
Cheers mate, will look forward to the results 
There seems to be a fair amount of people doing this on other forums so should be OK…
SP’s correct, those points tell you if it will fit.
If you want to know if it will work you need to appreciate cylinder Bore and ratio.
Cheers DP, I think Bore and Ratio is all good, because it is 4 pots to same/similar size 4 pots…
it will hit the front fairing on full lock dude, you would be better of with the R1 radial brembo its smaller and at a slight angle…
Nice one mate, thanks will have a look for one of those
Before you splash out, it may be worth having a peek in the Feb issue of PB as there is an article about upgrading the brakes of their project GSX-R1000 K1.
They replaced the stock 6-pots with a set of 4 piston ones form an SV1000 K3 (same as the pre-radial GSX-750) & measured stopping distance from 100MPH - 86.82 metres.
They then fitted a radial MC from a K4 GSX-R750 & repeated the test, stopping distance - 97.47 Metres !!
Interesting point was the tester thought the brakes felt a lot stronger with the radial MC, yet the tape measure indicates quite the opposite.
Just had a look on the Ron Ayers site (yeah, I’m at home & bored! :hehe: ) & although the part number MC for the K1 1000 & 750 are different, the piston is the same part number for both, so it’s not down to the MC from the 6 pot having a different bore to the one for the 4-pots.
Interesting!
Wonder if this was just a one-off or they made the rider to many different runs? Will try and get hold of the article