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Get more power and torque with premium quality European big bore kits that include, cylinder, piston, rings, and all gaskets required for a hassle free conversion. Spare pistons, rings, and gaskets a...

Get more power and torque with premium quality European big bore kits that include, cylinder, piston, rings, and all gaskets required for a hassle free conversion.

Spare pistons, rings, and gaskets also available.

Not all products are listed here - check the downloads section for a complete application list. Kits not in stock can usually be supplied in three to four weeks, depending on availability at the factory.

Get more power and torque with premium quality European big bore kits that include, cylinder, piston, rings, and all gaskets required for a hassle free conversion.

Spare pistons, rings, and gaskets also available.

Not all products are listed here - check the downloads section for a complete application list. Kits not in stock can usually be supplied in three to four weeks, depending on availability at the factory.

Sku
Product Name
Price
Picture of BIG BORE KIT KX250F 04-08, RMZ250 04-06 GAC 0510100004
BIG BORE KIT KX250F 04-08, RMZ250 04-06
BIG BORE KIT KX250F 04-08. RMZ250 04-06
Availability: Out of stock
$1,595.00
Picture of Big Bore Kit Kawasaki KX250F 250/300 09/10 GAC 0250100013
Big Bore Kit Kawasaki KX250F 250/300 09/10
Big Bore Kit Kawasaki KX250F 250/300 09/10
Availability: In stock
$1,400.00
Picture of BIG BORE KIT 290CC KXF 250 '11-12 GAC 0250100018
BIG BORE KIT 290CC KXF 250 '11-12
BIG BORE KIT 290CC KXF 250 '11-12
Availability: In stock
$1,295.00
Picture of BIG BORE KIT KX 250 F 2013-2016 290CC GAC 0250100019
BIG BORE KIT KX 250 F 2013-2016 290CC
BIG BORE KIT KX 250 F 2013-2016 290CC
Availability: In stock
$1,250.00
Picture of BIG BORE KIT KLX400 03-06, DRZ400 00-16 LTZ400 ATV 03-14 GAC 0510100002
BIG BORE KIT KLX400 03-06, DRZ400 00-16 LTZ400 ATV 03-14
BIG BORE KIT KAWASAKI/SUZUKI VARIOUS ENDURO/QUAD-ATV 94mm/435cc
Availability: Out of stock
$1,595.00
Picture of BIG BORE KIT KAWA KXF450  '06-08 490cc GAC 0250100003
BIG BORE KIT KAWA KXF450 '06-08 490cc
BIG BORE KIT KAWA KXF450 '06-08 490cc
Availability: Out of stock
$1,195.00
Picture of BIG BORE KIT KAWASAKI KX450 F '15-16 GAC 0250100015
BIG BORE KIT KAWASAKI KX450 F '15-16
BIG BORE KIT KAWASAKI KX450 F '15-16
Availability: In stock
$1,250.00
Picture of BIG BORE GASKET SET KX 450 F '09-'15 GAC 0250160012
BIG BORE GASKET SET KX 450 F '09-'15
BIG BORE GASKET SET KX 450 F '09-'15
Availability: In stock
$119.00
Picture of STANDARD PISTON AND RING KIT KAWASAKI KX125 '07 GAC S4C05400010B
STANDARD PISTON AND RING KIT KAWASAKI KX125 '07
STANDARD PISTON AND RING KIT KAWASAKI KX125 '07
Availability: In stock
$199.00
Picture of BIG BORE PISTON/RING KIT KAWA KX250F 04/08/RMZ250 4/6 GAC S4F08300003B
BIG BORE PISTON/RING KIT KAWA KX250F 04/08/RMZ250 4/6
BIG BORE PISTON/RING KIT KAWA KX250F 04/08/RMZ250 4/6
Availability: In stock
$399.00
Picture of BIG BORE PISTON/RING KIT RMZ290 07-09 KX250F 09/10 GAC S4F08300007B
BIG BORE PISTON/RING KIT RMZ290 07-09 KX250F 09/10
BIG BORE PISTON/RING KIT RMZ290 '07-'16 / KX250F '09-'16
Availability: In stock
$399.00
Picture of BIG BORE PISTON/RING KIT DRZ400 00/09/KAWA KLX400 03/06 GAC S4F09400002B
BIG BORE PISTON/RING KIT DRZ400 00/09/KAWA KLX400 03/06
BIG BORE PISTON/RING KIT DRZ400 00/09/KAWA KLX400 03/06
Availability: In stock
$399.00
Picture of BIG BORE PISTON/RING KIT KAWAZAKI KXF450 d.100 '05/09 GAC S4F10000011B
BIG BORE PISTON/RING KIT KAWAZAKI KXF450 d.100 '05/09
BIG BORE PISTON/RING KIT KAWAZAKI KXF450 d.100 '05/09
Availability: In stock
$399.00
Picture of BIG BORE PISTON KIT KAWASAKI KX 450 F '09-'15 GAC S4F100000190
BIG BORE PISTON KIT KAWASAKI KX 450 F '09-'15
BIG BORE PISTON KIT KAWASAKI KX 450 F '09-'15
Availability: In stock
$399.00
Picture of BIG BORE GASKET SET KX250F 04/08/SUZUKI RMZ250 04/06 GAC 0510160004
BIG BORE GASKET SET KX250F 04/08/SUZUKI RMZ250 04/06
BIG BORE GASKET SET KX250F 04/08/SUZUKI RMZ250 04/06
Availability: In stock
$139.00
Picture of BIG BORE GASKET SET KXF 250 09-12 GAC 0250160010
BIG BORE GASKET SET KXF 250 09-12
BIG BORE GASKET SET KXF 250 09-12
Availability: In stock
$75.00
Picture of BIG BORE GASKET SET KLX400 03/06 ATV/DRZ 400 00/09 GAC 0510160002
BIG BORE GASKET SET KLX400 03/06 ATV/DRZ 400 00/09
BIG BORE GASKET SET KAWASAKI/SUZUKI VARIOUS ENDURO/QUAD-ATV
Availability: In stock
$159.00
Picture of BIG BORE GASKET SET KXF450 d.100 '05/09 GAC 0250160003
BIG BORE GASKET SET KXF450 d.100 '05/09
BIG BORE GASKET SET DIA. 100mm KX450F '06-'08 / KLX/KFX450 '08-'13
Availability: In stock
$120.00
$99.00
Picture of RING SET YZ250F 01/10/WR250F 01/09/KX250F 04/10 RMZ250 04/09 GAC S41316133
RING SET YZ250F 01/10/WR250F 01/09/KX250F 04/10 RMZ250 04/09
RING SET YZ250F 01/10/WR250F 01/09/KX250F 04/10 RMZ250 04/09
Availability: In stock
$59.00
Picture of BIG BORE RING SET KLX400 03/06/DRZ 400 00/09 GAC S41316119
BIG BORE RING SET KLX400 03/06/DRZ 400 00/09
BIG BORE RING SET KLX400 03/06/DRZ 400 00/09
Availability: In stock
$69.00
Picture of RING SET CRF450R/X. RMZ450. TRX450R, KXF450, LTR450 GAC S41316062
RING SET CRF450R/X. RMZ450. TRX450R, KXF450, LTR450
RING SET CRF450R/X. RMZ450. TRX450R. KXF450. LTR450
Availability: In stock
$59.00
Picture of BIG BORE KIT KX250F 04-08, RMZ250 04-06
BIG BORE KIT KX250F 04-08, RMZ250 04-06
BIG BORE KIT KX250F 04-08. RMZ250 04-06
Availability: Out of stock
$1,595.00
Picture of Big Bore Kit Kawasaki KX250F 250/300 09/10
Big Bore Kit Kawasaki KX250F 250/300 09/10
Big Bore Kit Kawasaki KX250F 250/300 09/10
Availability: In stock
$1,400.00
Picture of BIG BORE KIT 290CC KXF 250 '11-12
BIG BORE KIT 290CC KXF 250 '11-12
BIG BORE KIT 290CC KXF 250 '11-12
Availability: In stock
$1,295.00
Picture of BIG BORE KIT KX 250 F 2013-2016 290CC
BIG BORE KIT KX 250 F 2013-2016 290CC
BIG BORE KIT KX 250 F 2013-2016 290CC
Availability: In stock
$1,250.00
Picture of BIG BORE KIT KLX400 03-06, DRZ400 00-16 LTZ400 ATV 03-14
BIG BORE KIT KLX400 03-06, DRZ400 00-16 LTZ400 ATV 03-14
BIG BORE KIT KAWASAKI/SUZUKI VARIOUS ENDURO/QUAD-ATV 94mm/435cc
Availability: Out of stock
$1,595.00
Picture of BIG BORE KIT KAWA KXF450  '06-08 490cc
BIG BORE KIT KAWA KXF450 '06-08 490cc
BIG BORE KIT KAWA KXF450 '06-08 490cc
Availability: Out of stock
$1,195.00
Picture of BIG BORE KIT KAWASAKI KX450 F '15-16
BIG BORE KIT KAWASAKI KX450 F '15-16
BIG BORE KIT KAWASAKI KX450 F '15-16
Availability: In stock
$1,250.00
Picture of BIG BORE GASKET SET KX 450 F '09-'15
BIG BORE GASKET SET KX 450 F '09-'15
BIG BORE GASKET SET KX 450 F '09-'15
Availability: In stock
$119.00
Picture of STANDARD PISTON AND RING KIT KAWASAKI KX125 '07
STANDARD PISTON AND RING KIT KAWASAKI KX125 '07
STANDARD PISTON AND RING KIT KAWASAKI KX125 '07
Availability: In stock
$199.00
Picture of BIG BORE PISTON/RING KIT KAWA KX250F 04/08/RMZ250 4/6
BIG BORE PISTON/RING KIT KAWA KX250F 04/08/RMZ250 4/6
BIG BORE PISTON/RING KIT KAWA KX250F 04/08/RMZ250 4/6
Availability: In stock
$399.00
Picture of BIG BORE PISTON/RING KIT RMZ290 07-09 KX250F 09/10
BIG BORE PISTON/RING KIT RMZ290 07-09 KX250F 09/10
BIG BORE PISTON/RING KIT RMZ290 '07-'16 / KX250F '09-'16
Availability: In stock
$399.00
Picture of BIG BORE PISTON/RING KIT DRZ400 00/09/KAWA KLX400 03/06
BIG BORE PISTON/RING KIT DRZ400 00/09/KAWA KLX400 03/06
BIG BORE PISTON/RING KIT DRZ400 00/09/KAWA KLX400 03/06
Availability: In stock
$399.00
Picture of BIG BORE PISTON/RING KIT KAWAZAKI KXF450 d.100 '05/09
BIG BORE PISTON/RING KIT KAWAZAKI KXF450 d.100 '05/09
BIG BORE PISTON/RING KIT KAWAZAKI KXF450 d.100 '05/09
Availability: In stock
$399.00
Picture of BIG BORE PISTON KIT KAWASAKI KX 450 F '09-'15
BIG BORE PISTON KIT KAWASAKI KX 450 F '09-'15
BIG BORE PISTON KIT KAWASAKI KX 450 F '09-'15
Availability: In stock
$399.00
Picture of BIG BORE GASKET SET KX250F 04/08/SUZUKI RMZ250 04/06
BIG BORE GASKET SET KX250F 04/08/SUZUKI RMZ250 04/06
BIG BORE GASKET SET KX250F 04/08/SUZUKI RMZ250 04/06
Availability: In stock
$139.00
Picture of BIG BORE GASKET SET KXF 250 09-12
BIG BORE GASKET SET KXF 250 09-12
BIG BORE GASKET SET KXF 250 09-12
Availability: In stock
$75.00
Picture of BIG BORE GASKET SET KLX400 03/06 ATV/DRZ 400 00/09
BIG BORE GASKET SET KLX400 03/06 ATV/DRZ 400 00/09
BIG BORE GASKET SET KAWASAKI/SUZUKI VARIOUS ENDURO/QUAD-ATV
Availability: In stock
$159.00
Picture of BIG BORE GASKET SET KXF450 d.100 '05/09
BIG BORE GASKET SET KXF450 d.100 '05/09
BIG BORE GASKET SET DIA. 100mm KX450F '06-'08 / KLX/KFX450 '08-'13
Availability: In stock
$120.00
$99.00
Picture of RING SET YZ250F 01/10/WR250F 01/09/KX250F 04/10 RMZ250 04/09
RING SET YZ250F 01/10/WR250F 01/09/KX250F 04/10 RMZ250 04/09
RING SET YZ250F 01/10/WR250F 01/09/KX250F 04/10 RMZ250 04/09
Availability: In stock
$59.00
Picture of BIG BORE RING SET KLX400 03/06/DRZ 400 00/09
BIG BORE RING SET KLX400 03/06/DRZ 400 00/09
BIG BORE RING SET KLX400 03/06/DRZ 400 00/09
Availability: In stock
$69.00
Picture of RING SET CRF450R/X. RMZ450. TRX450R, KXF450, LTR450
RING SET CRF450R/X. RMZ450. TRX450R, KXF450, LTR450
RING SET CRF450R/X. RMZ450. TRX450R. KXF450. LTR450
Availability: In stock
$59.00