Sizes of Caliber Piston

Could anyone tell me the caliper Piston diameter sizes of the following.
Kawasaki from brake(s). I asume dual disc front are same as single disc front.

Z1... ( 38.15mm from Z1owners forum GB) JB
Z2......
Z900-A4...... 42.85mm
KZ900......
Z1000-A1.....
Z1000-A2.....

RegardZ.
Ps. I have tried other forum sites will [strike]nil[/strike] one or two results to date.

I don't know the sizes, but you could use the cross-reference at Partzilla to expand the search.
According the x-ref the 76 KZ900-A4 has the same Fr Br caliper piston as a number of 70s models,
including several Triples, so maybe some of the Kawasaki Triples owners know the size.

Also, you might be able to use to the K&L catalogue to figure out what other models to check ---- some of them have the same caliper rebuild kit (KL 32-1289) as the 900, such as the 1980 550A. The pistons may not be interchangeable, but the diameters could be the same if the kits are the same.

KZ900-A4 Fr Br caliper piston --- 43048-006
Note: the Rr piston on some models is the same as the 900 Fr.

1969 H1 Mach III FRONT BRAKE (KH500-A8)
1970 H1-A FRONT BRAKE (KH500-A8)
1971 H1-B FRONT BRAKE (KH500-A8)
1972 H1-C FRONT BRAKE (KH500-A8)
1973 H1-D FRONT BRAKE (KH500-A8)
1974 H1-E FRONT BRAKE (KH500-A8)
1974 S3 Mach II FRONT BRAKE
1975 H1-F FRONT BRAKE (KH500-A8)
1975 S3-A Mach II FRONT BRAKE
1976 KH400-A3 FRONT BRAKE
1976 KH500-A8 FRONT BRAKE (KH500-A8)
1976 KZ750-B1 FRONT BRAKE
1976 KZ750-B1 REAR BRAKE
1976 KZ900-A4 FRONT BRAKE
1976 KZ900-B1 LTD FRONT BRAKE
1976 KZ900-B1 LTD REAR BRAKE
1977 KH400-A4 FRONT BRAKE
1977 KZ1000-B1 KZ1000 LTD REAR BRAKE ('77-'78 B1-B2)
1977 KZ750-B2 FRONT BRAKE
1977 KZ750-B2 REAR BRAKE
1977 KZ900-A5 FRONT BRAKE
1978 KH400-A5 FRONT BRAKE
1978 KZ1000-B2 KZ1000 LTD REAR BRAKE ('77-'78 B1-B2)
1978 KZ750-B3 FRONT BRAKE
1978 KZ750-B3 REAR BRAKE
1979 KZ1000-B3 KZ1000 LTD REAR BRAKE ('77-'78 B1-B2)
1979 KZ750-B4 FRONT BRAKE
1979 KZ750-B4 REAR BRAKE
1980 KZ1000-B4 LTD REAR BRAKE ('77-'78 B1-B2)

Thanks Martin_CSR. Also, received this from another forum.between all of you I think I have my answers.

Z1 Z1A Z1B - 43mm X 34mm.

Z900A4 Z1000A1 and KZ - 43 X 40.

Z1000A2 Z1R D1 and KZ - 38 X 40.

Z1R D2 D3 and KZ - 43 X 41.

REAR Z1000A1 A2 Z1R D1 - 43 X 22.

REAR Z1R D2 D3 - 43 X ??

ps interesting to note Kawasaki round of to the nearest lower number - 42mm, all listing outside Kawasaki round of other side - 43mm.

pss interesting to note some listings on FleaBaYe/online have many incorrect sizes.

psss interesting to note the UK Club boys must be on drugs, 38mm for a Z1? come on.

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