ZXR/GSXR brake upgrade

[Kwak addict]

I just drilled & tapped the holes in the Gix calipers to M10 fine, there's more than enough meat left IMHO.
Good upgrade, the Gix calipers are a fair bit lighter & there's noticeably more braking power than the 4 spots on the track (used HH pads in both)

[JimZXR]

Addict; did you upgrade the MC aswell or did you use the standard?

[NINJAINOZ]

The ZXR750 & ZX7R use the same master cylinder even though the ZX7R has the 6 pot calipers so I would say the stock master cylinder will work fine with the GSXR or ZX7R 6 piston calipers
I dont plan on changing the master cylinder to fit my ZX7R brakes

Note part number 43020-1054 on both these pages below>

94-ZXR750
http://www.motosport.com/motorcycle/oem ... source=oem

2000-ZX7R
http://www.motosport.com/motorcycle/oem ... source=oem

+ there is no mention of needing to change the master cylinder in the link below>
http://homepage.ntlworld.com/webzxr/zxr ... emods.html

[Kwak addict]

Addict; did you upgrade the MC aswell or did you use the standard?

I use a 5/8 master, a 14mm one has too much lever travel for my liking.

[NINJAINOZ]

Addict; did you upgrade the MC aswell or did you use the standard?

I use a 5/8 master, a 14mm one has too much lever travel for my liking.

What master cylinder did you use or what bike was it from?

[Gosling1]

those Suzuki calipers are cheap !! might grab some of those.....

[NINJAINOZ]

The later model parts are generally cheaper too, It pays to have a late model bike but then I spose there would be no fun in upgrading or simply not much need to be upgraded

Its a shame the later model calipers dont fit, Especially for this price>

http://www.ebay.com/itm/2005-2006-Suzuk ... 1c&vxp=mtr

http://www.ebay.com/itm/2005-2006-Suzuk ... 5e&vxp=mtr

[Gosling1]

those were the exact calipers I was looking at wonder what they will end up going for ?

[NINJAINOZ]

I reckon they wont go up much at all but you never know? They wont wont on the ZXR forks though, They have radial type mounts

[Gosling1]

I am thinking of using these calipers with adapter mounts. Phil has adapters for his ZRX and radial calipers fitted.....its a pretty easy conversion if you get the spec's right

[NINJAINOZ]

Yeah I have come across the radial type adapter/mounts before, Does the ZRX have the same mount spacing as the ZXR?

Im pretty happy with the ZX7R calipers I got for $50US & sent from the USA with a ZX7R lower triple clamp so the price worked out pretty good all up
Just over $100AU for the calipers & the lower triple clamp including postage to Australia is pretty reasonable
The EBC (FA188) HH brake pads that came with the calipers are worth more than that alone>

http://www.ebcbrakesdirect.com/bike/par ... 29&sec=Jap

http://www.zpower.com.au/catalog/produc ... ts_id/3033

Handy link to look up brake pads>
http://www.ebcbrakesdirect.com/bike/def ... 50&sec=Jap

A bit of a comparison between the ZXR & ZX7R front calipers>






I will find out the approx weight difference tomorrow, You can certainly notice how much lighter the ZX7R calipers are just by picking them up though

[Kwak addict]

Addict; did you upgrade the MC aswell or did you use the standard?

I use a 5/8 master, a 14mm one has too much lever travel for my liking.

What master cylinder did you use or what bike was it from?

Anything that has the 6 piston calipers as standard will have a 5/8 bore M'cyl. ZX6/7/9, GSXRs, TLs, 'Busas, YZF, FZR, etc.

[NINJAINOZ]

(As mentioned in my post above) From what I found the ZXR 750 & ZX7R use the exact same master cylinder (With a 15.8mm piston which means it is basically the same master cylinder & will work & feel just the same)?>

Note part number 43020-1054 on both these pages below (Which is a 15.8mm piston)>

94-ZXR750
http://www.motosport.com/motorcycle/oem ... source=oem

2000-ZX7R
http://www.motosport.com/motorcycle/oem ... source=oem

Same for the ZX9 & ZX6>

97 ZX6R
http://www.motosport.com/motorcycle/oem ... source=oem

97 ZX9R
http://www.motosport.com/motorcycle/oem ... source=oem

+ they all use the same lever (Shown below in the link) so there is no difference in the ratio/leverage etc etc, Same master cylinders, Not sure how you would have noticed any difference between a ZXR750 & ZX7 master cylinder apart from fresh fluid & bleeding the brakes perhaps?

http://www.motosport.com/motorcycle/oem ... 13236-1185

[Kwak addict]

My ZXR had a 14mm m/cyl when I got it, I found it OK with the 4 spots but it had too much lever travel when I put the Gix calipers on so I changed to a 5/8 & all was good.

[NINJAINOZ]

I wonder what the 14mm master cylinder was off because it certainly did not belong on a ZXR750? Maybe it was off a 250?

The master cylinder kits show that the ZXR750 & the ZX7R use the same (15.8mm) internals>

http://www.ebay.com.au/itm/Kawasaki-ZX6 ... 5896f4eaf4