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 38.1mm (1.5") x 41.3mm (1.625").  The seal groove starts at 33mm UP fro the bottom of the piston.  They are a direct replacement for the following models:

• GL1000 Front, 1975-1977 (2 required)
  
• GL1000LTD Front, ALL (2 required)
• Yamaha XS360 Front, 1976
• Yamaha XS400 Front and Rear, 1978
• Yamaha SR500 Front, 1978-1982
• Yamaha XJ650 R Seca Front, 1982
• Yamaha XS650 Front and Rear, 1977-1984
• Yamaha XS750SE/SF Special Front and Rear, 1977-1979
• Yamaha XS850 Rear, 1979-1981
• Yamaha XV920RH/RJ Front, 1981-1982
• Yamaha XS1100 Front and Rear, 1978-1981