The All Balls Brake Caliper Piston Kit, manufacturer part number 18-9013 and vendor part number 21-89013, is designed to rebuild one brake caliper on select Yamaha YZ80 models. This precision-engineered kit fits 1986–1995 Yamaha YZ80 motorcycles and provides a durable replacement for worn or damaged original caliper pistons.
Each piston is precision machined from high-grade 304 stainless steel. Stainless steel helps reduce thermal conductivity by up to 93% compared with aluminum, supporting consistent brake performance during demanding riding conditions. The material also resists the corrosion concerns associated with OEM chrome-plated steel and aluminum pistons.
This All Balls kit replaces plastic composite pistons that can become brittle with age and helps eliminate failure-prone ceramic inserts used on some KTM applications. Each kit includes the piston or pistons required to rebuild one caliper. Verify the motorcycle model and application before installation to ensure proper fitment.
Fitment: 1986–1995 Yamaha YZ80
Features:
- Brand: All Balls
- Product Type: Brake Caliper Piston Kit
- Manufacturer Part Number: 18-9013
- Vendor Part Number: 21-89013
- Material: Precision-machined high-grade 304 stainless steel
- Thermal Performance: Reduces thermal conductivity by up to 93% compared with aluminum
- Durability: Resists brittleness associated with aging plastic composite pistons
- Corrosion Resistance: Replaces corrosion-prone chrome-plated steel and aluminum pistons
- Application: Rebuilds one brake caliper
- Fitment: 1986–1995 Yamaha YZ80
Fitment:
1986 Yamaha YZ80
1987 Yamaha YZ80
1988 Yamaha YZ80
1989 Yamaha YZ80
1990 Yamaha YZ80
1991 Yamaha YZ80
1992 Yamaha YZ80
1993 Yamaha YZ80
1994 Yamaha YZ80
1995 Yamaha YZ80
1996 Yamaha YZ80
1997 Yamaha YZ80
1998 Yamaha YZ80
1999 Yamaha YZ80
2000 Yamaha TT-R125L
2000 Yamaha YZ80
2001 Yamaha TT-R125L
2001 Yamaha YZ80
2002 Yamaha TT-R125L
2002 Yamaha YZ85
2003 Yamaha TT-R125L
2003 Yamaha TT-R125LE
2003 Yamaha YZ85
2004 Yamaha TT-R125L
2004 Yamaha TT-R125LE
2004 Yamaha YZ85
2005 Yamaha TT-R125L
2005 Yamaha TT-R125LE
2005 Yamaha YZ85
2006 Yamaha TT-R125L
2006 Yamaha TT-R125LE
2006 Yamaha YZ85
2007 Yamaha TT-R125L
2007 Yamaha TT-R125LE
2007 Yamaha YZ85
2008 Yamaha TT-R125L
2008 Yamaha TT-R125LE
2008 Yamaha YZ85
2009 Yamaha TT-R125LE
2009 Yamaha YZ85
2010 Yamaha TT-R125LE
2010 Yamaha YZ85
2011 Yamaha TT-R125LE
2011 Yamaha YZ85
2012 Yamaha TT-R125LE
2012 Yamaha YZ85
2013 Yamaha TT-R125LE
2013 Yamaha YZ85
2014 Yamaha TT-R125LE
2014 Yamaha YZ85
2015 Yamaha TT-R125LE
2015 Yamaha YZ85
2016 Yamaha TT-R125LE
2016 Yamaha YZ85
2017 Yamaha TT-R125LE
2017 Yamaha YZ85
2018 Yamaha TT-R125LE
2018 Yamaha YZ65
2018 Yamaha YZ85
2019 Yamaha TT-R125LE
2019 Yamaha YZ65
2019 Yamaha YZ85
2020 Yamaha TT-R125LE
2020 Yamaha YZ65
2020 Yamaha YZ85
2021 Yamaha TT-R125LE
2021 Yamaha YZ65
2021 Yamaha YZ85
2022 Yamaha TT-R125LE
2022 Yamaha YZ65
2022 Yamaha YZ85
2022 Yamaha YZ85LW
2023 Yamaha TT-R125LE
2023 Yamaha YZ65
2023 Yamaha YZ85
2023 Yamaha YZ85LW
2024 Yamaha TT-R125LE
2024 Yamaha YZ65
2024 Yamaha YZ85
2024 Yamaha YZ85LW
2025 Yamaha TT-R125LE
2025 Yamaha YZ65
2025 Yamaha YZ85
2025 Yamaha YZ85LW
2026 Yamaha TT-R125LE
2026 Yamaha YZ65
2026 Yamaha YZ85
2026 Yamaha YZ85LW