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The All Balls Brake Caliper Piston Kit, manufacturer part number 18-9000 and vendor part number 21-89000, provides a reliable replacement solution for rebuilding one compatible brake caliper. Each kit includes the piston or pistons required for one caliper, helping restore proper brake system operation and support consistent hydraulic performance.
Precision machined from high-grade 304 stainless steel, this caliper piston kit is designed to address common weaknesses found in original-equipment components. Stainless steel reduces thermal conductivity by up to 93% compared with aluminum, while plastic composite pistons can become brittle and damaged over time. OEM chrome-plated steel and aluminum pistons may also be susceptible to corrosion, and this kit eliminates the failure-prone ceramic inserts used on some KTM models.
This All Balls kit fits select 1994–2001 KTM 250 SX motorcycles and 2004–2005 Husaberg FC 550 models. Confirm the motorcycle year, model, caliper configuration, and existing component specifications before installation. The All Balls brand is recognized for application-specific powersports replacement parts, and part number 18-9000 helps ensure accurate identification when servicing the brake caliper.
Features:
- Material: Precision machined from high-grade 304 stainless steel
- Thermal Performance: Reduces thermal conductivity by up to 93% compared with aluminum
- Durability: Provides an alternative to plastic composite pistons that can become brittle or damaged with age
- Corrosion Resistance: Replaces OEM chrome-plated steel and aluminum pistons that may be prone to corrosion
- KTM Compatibility: Eliminates failure-prone ceramic inserts found on some KTM models
- Kit Contents: Includes the piston or pistons required to rebuild one brake caliper
- Fitment: Fits 1994–2001 KTM 250 SX and 2004–2005 Husaberg FC 550 models
Fitment:
1994 KTM 125 Egs
1994 KTM 125 Exc
1994 KTM 125 SX
1994 KTM 250 EGS
1994 KTM 250 EXC
1994 KTM 250 SX
1994 KTM 300 EGS
1994 KTM 300 EXC
1994 KTM 300 MXC
1994 KTM 300 SX
1994 KTM 400 Egs
1994 KTM 400 EXC 4-Stroke
1994 KTM 440 Exc
1994 KTM 440 Mxc
1994 KTM 440 Sx
1994 KTM 550 Mxc
1994 KTM 620 Egs
1994 KTM 620 Exc
1995 KTM 125 Egs
1995 KTM 125 Exc
1995 KTM 125 SX
1995 KTM 250 EGS
1995 KTM 250 EXC
1995 KTM 250 SX
1995 KTM 300 EGS
1995 KTM 300 EXC
1995 KTM 300 MXC
1995 KTM 400 Comp.
1995 KTM 400 RXC 4-Stroke
1995 KTM 440 Exc
1995 KTM 440 Mxc
1995 KTM 620 Egs
1995 KTM 620 EXC 4-Stroke
1995 KTM 620 Rxc
1996 KTM 125 Egs
1996 KTM 125 Exc
1996 KTM 125 SX
1996 KTM 250 EGS
1996 KTM 250 EXC
1996 KTM 250 SX
1996 KTM 300 EGS
1996 KTM 300 EXC
1996 KTM 300 MXC
1996 KTM 360 Egs
1996 KTM 360 Exc
1996 KTM 360 Mxc
1996 KTM 360 Sx
1996 KTM 400 Comp.
1996 KTM 400 Egs
1996 KTM 400 EXC 4-Stroke
1996 KTM 400 RXC 4-Stroke
1996 KTM 550 Mxc
1996 KTM 620 Egs
1996 KTM 620 Rxc
1997 KTM 125 Egs
1997 KTM 125 Exc
1997 KTM 125 SX
1997 KTM 250 EGS
1997 KTM 250 EXC
1997 KTM 250 SX
1997 KTM 300 EGS
1997 KTM 300 EXC
1997 KTM 300 MXC
1997 KTM 360 Egs
1997 KTM 360 Exc
1997 KTM 360 Mxc
1997 KTM 360 Sx
1997 KTM 400 Comp.
1997 KTM 400 Egs
1997 KTM 400 EGS-E
1997 KTM 400 LS-E
1997 KTM 400 RXC 4-Stroke
1997 KTM 400 SXC 4-Stroke
1997 KTM 620 Comp
1997 KTM 620 Comp Limited
1997 KTM 620 Egs
1997 KTM 620 Egs-E
1997 KTM 620 LSE
1997 KTM 620 RXC 4-Stroke
1997 KTM 620 Sx
1997 KTM 620 Sxc
1998 KTM 125 Egs
1998 KTM 125 Exc
1998 KTM 125 SX
1998 KTM 200 Egs
1998 KTM 200 Exc
1998 KTM 200 Mxc
1998 KTM 250 EGS
1998 KTM 250 EXC
1998 KTM 250 MXC
1998 KTM 250 SX
1998 KTM 300 EGS
1998 KTM 300 EXC
1998 KTM 300 MXC
1998 KTM 380 Egs
1998 KTM 380 Exc
1998 KTM 380 Mxc
1998 KTM 380 Sx
1998 KTM 400 Lc4
1998 KTM 400 RXC 4-Stroke
1998 KTM 400 SX 4-Stroke
1998 KTM 400 SXC 4-Stroke
1998 KTM 400 TXC 4-Stroke
1998 KTM 620 Comp
1998 KTM 620 Super Moto
1998 KTM 620 Sx
1998 KTM 620 TXC 4-Stroke
1998 KTM 640 Adventure
1998 KTM 640 Lc4
1999 KTM 125 Egs
1999 KTM 125 Exc
1999 KTM 125 SX
1999 KTM 200 Egs
1999 KTM 200 Exc
1999 KTM 200 Mxc
1999 KTM 250 EGS
1999 KTM 250 EXC
1999 KTM 250 MXC
1999 KTM 250 SX
1999 KTM 300 EGS
1999 KTM 300 EXC
1999 KTM 300 MXC
1999 KTM 380 Egs
1999 KTM 380 Exc
1999 KTM 380 Mxc
1999 KTM 380 Sx
1999 KTM 400 Lc4
1999 KTM 400 SX 4-Stroke
1999 KTM 400 SXC 4-Stroke
1999 KTM 620 Comp
1999 KTM 620 Super Moto
1999 KTM 620 Sx
1999 KTM 640 Adventure
1999 KTM 640 Lc4
1999 KTM 640 Supermoto
1999 KTM 660 Lc4
2000 KTM 125 Exc
2000 KTM 125 Exe
2000 KTM 125 SX
2000 KTM 200 Exc
2000 KTM 200 Mxc
2000 KTM 200 Sx
2000 KTM 250 EXC
2000 KTM 250 MXC
2000 KTM 250 SX
2000 KTM 300 EXC
2000 KTM 300 MXC
2000 KTM 380 Exc
2000 KTM 380 Mxc
2000 KTM 380 Sx
2000 KTM 400 EXC 4-Stroke
2000 KTM 400 EXC-G Racing
2000 KTM 400 Lc4
2000 KTM 400 SC 4-Stroke
2000 KTM 400 SX 4-Stroke
2000 KTM 400 SXC 4-Stroke
2000 KTM 520 EXC 4-Stroke
2000 KTM 520 SX 4-Stroke
2000 KTM 640 Adventure
2000 KTM 640 Lc4
2000 KTM 640 Supermoto
2000 KTM 660 Lc4
2001 Husaberg FC 450
2001 Husaberg FE 450E
2001 Husaberg Fx450
2001 Husaberg FX450E
2001 KTM 125 Exc
2001 KTM 125 Exe
2001 KTM 125 SX
2001 KTM 200 Exc
2001 KTM 200 Mxc
2001 KTM 200 Sx
2001 KTM 250 EXC
2001 KTM 250 EXC-G Racing
2001 KTM 250 MXC
2001 KTM 250 SX
2001 KTM 250 SXS
2001 KTM 300 EXC
2001 KTM 300 MXC
2001 KTM 380 Exc
2001 KTM 380 Mxc
2001 KTM 380 Sx
2001 KTM 400 EXC 4-Stroke
2001 KTM 400 EXC-G Racing
2001 KTM 400 Lc4
2001 KTM 400 MXC 4-Stroke
2001 KTM 400 SX 4-Stroke
2001 KTM 520 EXC 4-Stroke
2001 KTM 520 MXC 4-Stroke
2001 KTM 520 SX 4-Stroke
2001 KTM 540 SXS
2001 KTM 640 Adventure
2001 KTM 640 Lc4
2001 KTM 640 Supermoto
2001 KTM 660 Rallye
2002 Husaberg FC 450
2002 Husaberg FE 450E
2002 Husaberg Fx450
2002 Husaberg FX450E
2002 KTM 125 Exc
2002 KTM 125 SX
2002 KTM 200 Exc
2002 KTM 200 Mxc
2002 KTM 200 Sx
2002 KTM 250 EXC
2002 KTM 250 EXC-G Racing
2002 KTM 250 SX
2002 KTM 300 EXC
2002 KTM 300 MXC
2002 KTM 380 Exc
2002 KTM 380 Sx
2002 KTM 400 EXC 4-Stroke
2002 KTM 400 EXC-G Racing
2002 KTM 400 MXC 4-Stroke
2002 KTM 400 SX 4-Stroke
2002 KTM 520 EXC 4-Stroke
2002 KTM 520 MXC 4-Stroke
2002 KTM 520 SX 4-Stroke
2002 KTM 540 SXS
2002 KTM 640 Adventure
2002 KTM 640 Enduro
2002 KTM 640 Lc4
2002 KTM 660 Rallye
2003 Husaberg FC 450
2003 Husaberg FE 450E
2003 Husaberg Fx450
2003 Husaberg FX450E
2003 KTM 125 Exc
2003 KTM 125 SX
2003 KTM 200 Exc
2003 KTM 200 Mxc
2003 KTM 200 Sx
2003 KTM 250 EXC
2003 KTM 250 EXC-G Racing
2003 KTM 250 SX
2003 KTM 250 SXS
2003 KTM 300 EXC
2003 KTM 300 MXC
2003 KTM 450 EXC-F
2003 KTM 450 EXC-G Racing
2003 KTM 450 MXC 4-Stroke
2003 KTM 450 SX-F
2003 KTM 450 SXS 4-Stroke
2003 KTM 525 EXC 4-Stroke
2003 KTM 525 MXC 4-Stroke
2003 KTM 525 SX 4-Stroke
2003 KTM 540 SXS
2003 KTM 625 SXC 4-Stroke
2003 KTM 640 Adventure
2003 KTM 640 Enduro
2003 KTM 660 Rallye
2004 Husaberg FC 450
2004 Husaberg FC 550
2004 Husaberg FC 650
2004 Husaberg FE 450
2004 Husaberg FE 550E
2004 Husaberg FE 650E
2004 KTM 125 Exc
2004 KTM 125 SX
2004 KTM 125 SXS
2004 KTM 200 Exc
2004 KTM 200 Sx
2004 KTM 250 EXC
2004 KTM 250 EXC-G Racing
2004 KTM 250 SX
2004 KTM 250 SXS
2004 KTM 300 EXC
2004 KTM 300 MXC
2004 KTM 400 EXC-G Racing
2004 KTM 400 LS-E
2004 KTM 450 EXC-F
2004 KTM 450 EXC-G Racing
2004 KTM 450 MXC 4-Stroke
2004 KTM 450 SX-F
2004 KTM 450 SXS 4-Stroke
2004 KTM 450 XC-F
2004 KTM 525 EXC 4-Stroke
2004 KTM 525 MXC 4-Stroke
2004 KTM 525 SX 4-Stroke
2004 KTM 540 SXS
2004 KTM 625 Sxc
2004 KTM 640 Enduro
2004 KTM 660 Rallye
2005 Husaberg FC 450
2005 Husaberg FC 550
2005 Husaberg FC 650
2005 Husaberg FE 450
2005 Husaberg FE 550E
2005 Husaberg FE 650E
2005 KTM 125 Exc
2005 KTM 125 SX
2005 KTM 200 Exc
2005 KTM 250 EXC
2005 KTM 250 EXC-G Racing
2005 KTM 250 SX
2005 KTM 250 SX-F
2005 KTM 300 EXC
2005 KTM 300 MXC
2005 KTM 400 EXC-G Racing
2005 KTM 400 LS-E
2005 KTM 450 EXC-F
2005 KTM 450 EXC-G Racing
2005 KTM 450 MXC 4-Stroke
2005 KTM 450 SX-F
2005 KTM 450 XC-F
2005 KTM 525 EXC 4-Stroke
2005 KTM 525 MXC 4-Stroke
2005 KTM 525 SX 4-Stroke
2005 KTM 540 SXS
2005 KTM 625 Sxc
2005 KTM 640 Lc4
2005 KTM 660 Rallye
2006 Husaberg FE 450
2006 Husaberg FE 550E
2006 Husaberg FE 650E
2006 Husaberg FS450E
2006 KTM 125 Exc
2006 KTM 125 SX
2006 KTM 200 Exc
2006 KTM 200 Xc
2006 KTM 200 Xc-W
2006 KTM 250 EXC
2006 KTM 250 EXC-G Racing
2006 KTM 250 SX
2006 KTM 250 SX-F
2006 KTM 250 XC
2006 KTM 250 XC-W
2006 KTM 250 XCF-W
2006 KTM 300 EXC
2006 KTM 300 XC
2006 KTM 300 XC-W
2006 KTM 400 EXC-G Racing
2006 KTM 450 EXC-F
2006 KTM 450 EXC-G Racing
2006 KTM 450 SX-F
2006 KTM 450 XC-F
2006 KTM 525 EXC 4-Stroke
2006 KTM 525 SX 4-Stroke
2006 KTM 525 XC-G 4-Stroke
2006 KTM 540 SXS
2006 KTM 625 Sxc
2006 KTM 660 Rallye
2006 KTM 660 Rallye Factory Replica
2007 Husaberg FE 450
2007 Husaberg FE 550E
2007 Husaberg FE 650E
2007 KTM 125 Exc
2007 KTM 125 SX
2007 KTM 144 Sx
2007 KTM 200 Exc
2007 KTM 200 Xc
2007 KTM 200 Xc-W
2007 KTM 250 EXC
2007 KTM 250 SX
2007 KTM 250 SX-F
2007 KTM 250 XC
2007 KTM 250 XC-F
2007 KTM 250 XC-W
2007 KTM 250 XCF-W
2007 KTM 300 EXC
2007 KTM 300 XC
2007 KTM 300 XC-W
2007 KTM 400 EXC-G Racing
2007 KTM 400 XC-W 4-Stroke
2007 KTM 450 EXC-F
2007 KTM 450 EXC-G Racing
2007 KTM 450 SX-F
2007 KTM 450 SXS 4-Stroke
2007 KTM 450 XC-F
2007 KTM 450 XCF-W
2007 KTM 525 EXC 4-Stroke
2007 KTM 525 XC-G 4-Stroke
2007 KTM 525 XC-W 4-Stroke
2007 KTM 660 Rallye
2007 KTM 660 Rallye Factory Replica
2008 Husaberg FE 450
2008 Husaberg FE 550E
2008 Husaberg FS450E
2008 KTM 125 Exc
2008 KTM 125 SX
2008 KTM 144 Sx
2008 KTM 200 Exc
2008 KTM 200 Xc
2008 KTM 200 Xc-W
2008 KTM 250 EXC
2008 KTM 250 SX
2008 KTM 250 SX-F
2008 KTM 250 XC
2008 KTM 250 XC-F
2008 KTM 250 XC-W
2008 KTM 250 XCF-W
2008 KTM 300 EXC
2008 KTM 300 XC
2008 KTM 300 XC-W
2008 KTM 450 EXC-R 4-Stroke
2008 KTM 450 SX-F
2008 KTM 450 SXS 4-Stroke
2008 KTM 450 XC-F
2008 KTM 450 XCF-W
2008 KTM 505 Sx-F
2008 KTM 505 Xc-F
2008 KTM 530 EXC-R 4-Stroke
2008 KTM 530 XC-W 4-Stroke
2009 KTM 125 Exc
2009 KTM 200 Exc
2009 KTM 200 Xc
2009 KTM 200 Xc-W
2009 KTM 250 EXC
2009 KTM 250 XC
2009 KTM 250 XC-F
2009 KTM 250 XC-W
2009 KTM 250 XCF-W
2009 KTM 300 EXC
2009 KTM 300 XC
2009 KTM 300 XC-W
2009 KTM 400 EXC 4-Stroke
2009 KTM 400 XC-W 4-Stroke
2009 KTM 450 EXC-R 4-Stroke
2009 KTM 450 XC-F
2009 KTM 450 XCF-W
2009 KTM 505 Xc-F
2009 KTM 530 EXC-R 4-Stroke
2009 KTM 530 XC-W 4-Stroke
2010 KTM 200 Exc
2010 KTM 250 EXC
2010 KTM 250 XCF-W
2010 KTM 300 EXC
2010 KTM 450 XCF-W
2011 KTM 200 Exc
2011 KTM 300 EXC
2012 KTM 200 Exc
2012 KTM 300 EXC
2013 KTM 300 EXC
2014 KTM 300 EXC
2015 KTM 300 EXC
2016 KTM 300 EXC