These replacement brake pistons offer a direct fit replacement and are made from a special heat treated phenolic material that will never rust or corrode.  The phenolic material also resists heat transfer and will help to keep the brake fluid cooler resulting in smoother, more consistent fade free braking.  The pistons are also extremely lightweight resulting in less unsprung weight and better handling. 


The pistons are made from a phenolic material that is never going to rust or corrode, you'll never have to worry about a frozen piston again.  Because of the low heat transfer characteristics fade free braking is always ensured.  Not only are they rustproof and resist heat transfer they are also extremely lightweight.  A weight savings of approximately 70% is realized resulting in less unsprung weight and better handling.  Because of the materials utilized, the brake piston does not retain the plastic spacer included by Honda.  This results in a seamless connection between the brake piston and the brake pad giving better feel at the lever and more force transmitted to the pads.


Do you need seals?  We offer genuine OEM factory replacement seals available as an option included with your piston, select your option above before adding to your cart. 

Please Note:  It is common for the same model year to have differing pistons based upon the international market in which the bikes were sold.  Please measure and verify fitment prior to purchase.  These replacement phenolic brake pistons measure 42.8mm (1.685") x 39.8mm (1.57").  The seal groove starts at 29mm UP from the bottom of the piston.  They are a direct replacement for the following models:

• KZ440A1/A2/A3 LTD 1980-1982 Front
• KZ440D1/D2/D3/D4 LTD Belt 1980-1982 Front
• KZ550A1 1980 Front
• KZ650B1/B2/B2A/B3 1977-1979 Front
• KZ650E1 LTD 1980 Front
• KZ650F1 1980 Front
• KZ750B1 (2-cylinder) 1976 Front
• KZ750 B1, B2, B3, B4. 76-79 Front and Rear
• KZ750B2/B3/B4 (2-cylinder) 1977-1979 Front
• KZ750G1 LTD (2-cylinder) 1980 Front
• KZ900 A4, A5 1976-1977 Front
• KZ900B1 LTD 1976 Front and Rear
• KZ1000A1/A2 1977-1978 Front
• KZ1000A3/A3A/A4 MKII 1979-1980  Front
• KZ1000 B1, B2. 1977-1978 Rear only
• KZ1000B3/B4 LTD 1979-1980 Front
• KZ1000C2/C3/C4 Police 1979-1981 Front
• KZ1000D3 Z1R 1980 Front
• KZ1000E1/E2 Shaft ST 1979-1980 Front
• KZ1000 LTD. 1977-1978 Rear Only
• KZ1000G1 LTD Classic 1980 Front
• KZ1300A1/A2/A3/A4 1979-1982 Front
• KZ1300B2 Touring 1980 Front