Dual disc options on z1 900

mtbspeedfreak wrote: Anyway, does anyone on here have experience with AP Racing products? I'm eying up their "classic" calipers and MCs, I really like the look and I'm sure I'd get incredible stopping power (more than my tire is capable of); but I don't know if they'd clear my spokes, what sort of disc options I'd have or where to get the right brackets to work with my KZ lowers.

AP Racing Classic Master Cylinder: www.apracing.com/info/products.asp?produ...-CP2215-90_2557_1875
AP Racing Classic Caliper: www.apracing.com/info/products.asp?produ...P2696-38E0_2536_1085

AP was the best caliper money could buy that is why you see them on almost every pukka race bike from that era. No experience with AP myself but have done big brakes (S1 replica calipers) on wire wheel on my bike. Prior to that I was going to use Grimeca large body calipers - basically a poor man's version of the AP caliper without the fins, a bunch of AHRMA guys use 'em. Same spacing and piston size as AP classic caliper. Anyway, the stock disc sits too close to the spokes to fit AP/Grimeca caliper. PMC makes disc spacers (6mm IIRC) that will move the discs out toward the fork leg. In fact, PMC do a complete AP kit with discs if you are rich Don't bother looking if you think the $100 bracket is expensive.

I'd buy the calipers (I did, Grimeca), get the spacers from PMC (I did), pick up the EBC floating rotors for lighter weight and better performance - you would just have to make some caliper hangers as noone sells them. Alternatively, I think you can get Grimeca small body calipers and KZ hangers (not Z1) from PMFR - same piston size/braking performance but they don't look as racey as the large body caliper.

PMC are the only company that do a bolt on conversion for the Z1. And Ian is right, H2 and early H1 front calipers have the same spacing as Z1 calipers.

dutchz wrote: PMC makes disc spacers (6mm IIRC) that will move the discs out toward the fork leg. In fact, PMC do a complete AP kit with discs if you are rich Don't bother looking if you think the $100 bracket is expensive.

I'd buy the calipers (I did, Grimeca), get the spacers from PMC (I did), pick up the EBC floating rotors for lighter weight and better performance - you would just have to make some caliper hangers as noone sells them. Alternatively, I think you can get Grimeca small body calipers and KZ hangers (not Z1) from PMFR - same piston size/braking performance but they don't look as racey as the large body caliper.

PMC are the only company that do a bolt on conversion for the Z1.

179,550 Japanese Yen. What's that... $2,211!!!!!!!!!!!!!!

I have a line on AP Racing though... don't quote me, but I believe there is only one US importer???

This quote is several months old, but $474 for the MC and $267 a side for loaded calipers [pads and hardware included]. EBC Pro-Lite floating rotors run, what, $200 a side? Throw in a set of PMC spacers and mounting brackets and I'd only need plumbing, a stickier front tire and a shorty brake lever so I can only grab it with one finger!

Some pics of AP racing calipers & EBC prolite discs







AP master cylinder, z900 standard hub, betor forks

I gotta say those calipers look bitching awesome!!! They're bigger than I had envisioned.

Is that your bike, Steve? Do you have any with the calipers mounted and all the plumbing hooked up? Are they the stock wire wheels?

dont have any recent pics only a few old ones with standard discs set up

late eighties - red

nineties - green

now - back to black


Its a stock z900 front hub with akront rim, discs have 5mm spacer each side to line up with calipers and theres about 10 mm clearance between caliper and spokes.

front calipers - CP2195 old type (handed)
rear caliper - CP2696

Link for Harris performance
www.harris-performance.com/website/acata...Piston_Calipers.html

1985 and 86 GPZ 900 calipers will bolt onto Z1 fork legs as well, and if you use a kz 1000 ltd mag front wheel it will stop really well.