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Brake Caliper Piston Kit — Beta RC 4T 450 (2025)

Part # 18-9005
Item #138795
Fits 97 motorcycles
  • Beta
    • RC 4T 450 · 2025 (front)
    • RR 2T 125 · 2019–2024 (front)
    • RR 2T 125 Race · 2021–2025 (front)
    • RR 2T 125 X-PRO · 2025 (front)
    • RR 2T 200 · 2019–2024 (front)
    • RR 2T 200 Race · 2021–2025 (front)
    • RR 2T 200 X-PRO · 2025 (front)
    • RR 2T 250 · 2013–2024 (front)
    • RR 2T 250 Race · 2022–2025 (front)
    • RR 2T 250 X-PRO · 2025 (front)
    • RR 2T 300 · 2013–2024 (front)
    • RR 2T 300 Race · 2022–2025 (front)
    • RR 2T 300 X-PRO · 2025 (front)
    • RR 4T 250 · 2005–2007 (front)
    • RR 4T 350 · 2011–2024 (front)
    • RR 4T 350 Race · 2022–2025 (front)
    • RR 4T 350 X-PRO · 2025 (front)
    • RR 4T 390 · 2015–2024 (front)
    • RR 4T 390 Race · 2022–2025 (front)
    • RR 4T 390 X-PRO · 2025 (front)
    • RR 4T 400 · 2005–2014 (front)
    • RR 4T 430 · 2015–2024 (front)
    • RR 4T 430 Race · 2022–2025 (front)
    • RR 4T 430 X-PRO · 2025 (front)
    • RR 4T 450 · 2005–2014 (front)
    • RR 4T 480 · 2018–2024 (front)
    • RR 4T 480 Race · 2022–2025 (front)
    • RR 4T 480 X-PRO · 2025 (front)
    • RR 4T 498 · 2012–2014 (front)
    • RR 4T 520 · 2010–2011 (front)
    • RR 4T 525 · 2005–2009 (front)
    • RR-S 4T 350 · 2017–2024 (front)
    • RR-S 4T 390 · 2017–2024 (front)
    • RR-S 4T 390 Special Edition · 2024 (front)
    • RR-S 4T 430 · 2017–2024 (front)
    • RR-S 4T 500 · 2017–2024 (front)
    • RR-S 4T 500 Special Edition · 2024 (front)
    • RS 4T 390 · 2015–2016 (front)
    • RS 4T 400 · 2014 (front)
    • RS 4T 430 · 2015–2016 (front)
    • RS 4T 500 · 2015–2016 (front)
    • RS 4T 520 · 2014 (front)
    • RX 2T 300 · 2021–2025 (front)
    • RX 4T 450 · 2024–2025 (front)
    • XTRAINER 250 · 2024–2025 (front)
    • XTRAINER 300 · 2015–2025 (front)
  • Gas-Gas
    • EC125 · 2008–2015 (front)
    • EC200 · 2008–2019 (front)
    • EC250 · 2008–2019 (front)
    • EC250 4T · 2010–2015 (front)
    • EC250 Replica · 2013–2014 (front)
    • EC250 Six Days · 2019 (front)
    • EC300 · 2008–2019 (front)
    • EC300 4T · 2013–2015 (front)
    • EC300 Replica · 2013–2014 (front)
    • EC300 Six Days · 2019 (front)
    • EC450 4T · 2013–2015 (front)
    • Enduro GP 250 · 2018 (front)
    • Enduro GP 300 · 2018 (front)
    • MC125 · 2008–2009 (front)
    • MC250 · 2008–2009 (front)
    • SM125 · 2008–2009 (front)
    • XC200 · 2018–2019 (front)
    • XC250 · 2018–2019 (front)
    • XC300 · 2018–2019 (front)
  • Honda
    • CR125R · 2001–2007 (front)
    • CR250R · 2001–2007 (front)
    • CRF150F · 2003 (front)
    • CRF250R · 2004–2018 (front)
    • CRF250X · 2004–2017 (front)
    • CRF450R · 2002–2018 (front)
    • CRF450RX · 2017–2018 (front)
    • CRF450X · 2005–2017 (front)
  • Kawasaki
    • KLX450R (AU) · 2018–2019 (front)
    • KLX450R · 2008–2009 (front)
    • KX125 · 2001–2005 (front)
    • KX250 · 2001–2007 (front)
    • KX250F · 2004–2025 (front)
    • KX250X · 2021–2025 (front)
    • KX450F · 2006–2023 (front)
    • KX450SR · 2022–2023 (front)
    • KX450X · 2021–2023 (front)
    • Rieju MR Pro 200 · 2022–2024 (front)
    • MR Pro 250 · 2022–2024 (front)
    • MR Pro 300 · 2021–2024 (front)
    • MR Racing 200 · 2022–2023 (front)
    • MR Racing 250 · 2021–2023 (front)
    • MR Racing 300 · 2020–2024 (front)
  • Suzuki
    • RMZ250 · 2004–2025 (front)
    • RMZ450 · 2013–2025 (front)
  • Yamaha
    • WR250F · 2003–2014 (front)
    • WR250R DUAL SPORT · 2008–2020 (front)
    • WR450F · 2003–2015 (front)
    • YZ125 · 2003–2007 (front)
    • YZ250 · 2003–2007 (front)
    • YZ250F · 2003–2006 (front)
    • YZ450F · 2003–2007 (front)

⚠ Brake parts are caliper-specific. The same model can use different calipers by trim or year (base vs SP, ABS, Brembo vs stock), and catalog data isn't always exact. Confirm this fits your bike's actual caliper before ordering.

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All Balls Racing Brake Caliper Piston Kit — Beta RC 4T 450 (2025) + 96 more
Product Details

Caliper pistons stuck, sticky lever feel, or a creeping low fluid level with no visible leak — the rubber seals inside the caliper or master cylinder are toast. All Balls rebuild kits include every rubber part you need to make ONE caliper or master cylinder new again: piston seals, dust boots, bleeder caps, pad pins, copper crush washers. OEM-spec EPDM rubber, bike-specific fitment.

Kit fits the bikes listed below. Confirm whether you need front or rear (some bikes share a kit, most don't).

Fits:

  • Beta RC 4T 450 (2025)
  • Beta RR 2T 125 (2019-2024)
  • Beta RR 2T 125 Race (2021-2025)
  • Beta RR 2T 125 X-PRO (2025)
  • Beta RR 2T 200 (2019-2024)
  • Beta RR 2T 200 Race (2021-2025)
  • Beta RR 2T 200 X-PRO (2025)
  • Beta RR 2T 250 (2013-2024)
  • Beta RR 2T 250 Race (2022-2025)
  • Beta RR 2T 250 X-PRO (2025)
  • Beta RR 2T 300 (2013-2024)
  • Beta RR 2T 300 Race (2022-2025)
  • Beta RR 2T 300 X-PRO (2025)
  • Beta RR 4T 250 (2005-2007)
  • Beta RR 4T 350 (2011-2024)
  • Beta RR 4T 350 Race (2022-2025)
  • Beta RR 4T 350 X-PRO (2025)
  • Beta RR 4T 390 (2015-2024)
  • Beta RR 4T 390 Race (2022-2025)
  • Beta RR 4T 390 X-PRO (2025)
  • Beta RR 4T 400 (2005-2014)
  • Beta RR 4T 430 (2015-2024)
  • Beta RR 4T 430 Race (2022-2025)
  • Beta RR 4T 430 X-PRO (2025)
  • Beta RR 4T 450 (2005-2014)
  • Beta RR 4T 480 (2018-2024)
  • Beta RR 4T 480 Race (2022-2025)
  • Beta RR 4T 480 X-PRO (2025)
  • Beta RR 4T 498 (2012-2014)
  • Beta RR 4T 520 (2010-2011)
  • Beta RR 4T 525 (2005-2009)
  • Beta RR-S 4T 350 (2017-2024)
  • Beta RR-S 4T 390 (2017-2024)
  • Beta RR-S 4T 390 Special Edition (2024)
  • Beta RR-S 4T 430 (2017-2024)
  • Beta RR-S 4T 500 (2017-2024)
  • Beta RR-S 4T 500 Special Edition (2024)
  • Beta RS 4T 390 (2015-2016)
  • Beta RS 4T 400 (2014)
  • Beta RS 4T 430 (2015-2016)
  • Beta RS 4T 500 (2015-2016)
  • Beta RS 4T 520 (2014)
  • Beta RX 2T 300 (2021-2025)
  • Beta RX 4T 450 (2024-2025)
  • Beta XTRAINER 250 (2024-2025)
  • Beta XTRAINER 300 (2015-2025)
  • Gas-Gas EC125 (2008-2015)
  • Gas-Gas EC200 (2008-2019)
  • Gas-Gas EC250 (2008-2019)
  • Gas-Gas EC250 4T (2010-2015)
  • Gas-Gas EC250 Replica (2013-2014)
  • Gas-Gas EC250 Six Days (2019)
  • Gas-Gas EC300 (2008-2019)
  • Gas-Gas EC300 4T (2013-2015)
  • Gas-Gas EC300 Replica (2013-2014)
  • Gas-Gas EC300 Six Days (2019)
  • Gas-Gas EC450 4T (2013-2015)
  • Gas-Gas Enduro GP 250 (2018)
  • Gas-Gas Enduro GP 300 (2018)
  • Gas-Gas MC125 (2008-2009)
  • Gas-Gas MC250 (2008-2009)
  • Gas-Gas SM125 (2008-2009)
  • Gas-Gas XC200 (2018-2019)
  • Gas-Gas XC250 (2018-2019)
  • Gas-Gas XC300 (2018-2019)
  • Honda CR125R (2001-2007)
  • Honda CR250R (2001-2007)
  • Honda CRF150F (2003)
  • Honda CRF250R (2004-2018)
  • Honda CRF250X (2004-2017)
  • Honda CRF450R (2002-2018)
  • Honda CRF450RX (2017-2018)
  • Honda CRF450X (2005-2017)
  • Kawasaki KLX450R (AU (2018-2019)
  • Kawasaki KLX450R (2008-2009)
  • Kawasaki KX125 (2001-2005)
  • Kawasaki KX250 (2001-2007)
  • Kawasaki KX250F (2004-2025)
  • Kawasaki KX250X (2021-2025)
  • Kawasaki KX450F (2006-2023)
  • Kawasaki KX450SR (2022-2023)
  • Kawasaki KX450X (2021-2023)
  • Kawasaki Rieju MR Pro 200 (2022-2024)
  • Kawasaki MR Pro 250 (2022-2024)
  • Kawasaki MR Pro 300 (2021-2024)
  • Kawasaki MR Racing 200 (2022-2023)
  • Kawasaki MR Racing 250 (2021-2023)
  • Kawasaki MR Racing 300 (2020-2024)
  • Suzuki RMZ250 (2004-2025)
  • Suzuki RMZ450 (2013-2025)
  • Yamaha WR250F (2003-2014)
  • Yamaha WR250R DUAL SPORT (2008-2020)
  • Yamaha WR450F (2003-2015)
  • Yamaha YZ125 (2003-2007)
  • Yamaha YZ250 (2003-2007)
  • Yamaha YZ250F (2003-2006)
  • Yamaha YZ450F (2003-2007)

Kit contents:

  • 2x Caliper Piston

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