Engine

Cylinder Kits

CYLINDER KITS
Kits include aluminum cylinder with galvanic coating designed with wider water jackets
Forged piston with molybdenum coating
Special gasket kit
Easy-to-follow step-by-step installation instructions
All are bolt-on; no machining required
WORKS CYLINDER KITS
Include aluminum cylinder with nickel-carbide coating, ported to Factory Works specs
Aluminum cylinder head with a removable bronze dome allowing for a higher compression ratio and anti-detonation features
Specially designed, high-performance, hard-anodized power valves (cannot use OE)
Specially designed, high-performance, Cast-Lite flat-top piston kit
Athena top-end gasket set including required seals and hardware
Easy-to-follow, step-by-step installation instructions
RACE CYLINDER KITS
Include aluminum cylinder with nickel-carbide coating
Specially designed, high-performance, hard-anodized power valves (cannot use OE)
Specially designed, high-performance, forged OE-style domed piston kit
Athena top-end gasket set including required seals and hardware
Easy-to-follow, step-by-step installation instructions

Honda
	Part #	Description	Price
	0910-0254	FITS MODEL: CRF450R 02-08 - Forged piston kit (95.95mm)	$187.95
	0910-0254	FITS MODEL: CRF450X 05-07 - Forged piston kit (95.95mm)	$187.95
	0910-0255	FITS MODEL: CRF450R 02-08 - Forged piston kit A (99.95mm, 11.6:1 compression)	$202.95
	0910-0447	FITS MODEL: CRF250R 04-08 - Forged piston kit A (77.95mm piston)	$187.95
	0910-0448	FITS MODEL: CRF250R 04-08 - Forged piston kit B (77.96mm piston)	$187.95
	0910-0646	FITS MODEL: CRF250R 04-08 - Forged piston kit A (81.95mm piston)	$202.95
	0910-0722	FITS MODEL: CRF250R 04-08 - Forged piston kit B (81.96mm piston)	$202.95
	0910-0723	FITS MODEL: CRF450R 02-08 - Forged Rev dome (99.96mm, 11.6:1 compression)	$202.95
	0910-0724	FITS MODEL: CRF450R 02-08 - Forged piston kit B (99.96mm, 11.6:1 compression)	$187.95
	0931-0013	FITS MODEL: CRF450R 02-08 - Works cylinder kit (96mm stock bore)	$753.95
	0931-0014	FITS MODEL: CRF450R 02-08 - Works cylinder kit (100mm big bore) 490cc	$796.95
	0931-0093	FITS MODEL: CRF250R 04-08 - Works cylinder kit (78mm stock bore) 250cc	$727.95
	0931-0094	FITS MODEL: CRF250R 04-08 - Works cylinder kit (82mm big bore) 280cc	$848.95
	0931-0102	FITS MODEL: CRF450X 05-07 - Cylinder kit (big bore)	$755.95
	0931-0103	FITS MODEL: CRF450X 05-07 - Cylinder kit (100mm big bore) 490cc	$799.95
	0934-0191	FITS MODEL: CRF450R 02-08 - Gasket kit	$98.95
	0934-0191	FITS MODEL: CRF450X 05-07 - Gasket kit	$98.95
	0934-0192	FITS MODEL: CRF450R 02-08 - Gasket kit	$98.95
	0934-1053	FITS MODEL: CRF250R 04-08 - Gasket kit	$60.95
	0934-1054	FITS MODEL: CRF250R 04-08 - Gasket kit	$69.95
	0934-1528	FITS MODEL: CRF450X 05-07 - Gasket kit	$64.95
	0934-1529	FITS MODEL: CRF450X 05-07 - Gasket kit	$72.95
Kawasaki
	Part #	Description	Price
	0910-0180	FITS MODEL: KLX400 03-07 - Forged piston kit B (89.95mm)	$187.95
	0910-0181	FITS MODEL: KLX400 03-07 - Forged piston kit C (89.96mm)	$187.95
	0910-0182	FITS MODEL: KLX400 03-07 - Forged piston kit (90mm)	$187.95
	0910-0253	FITS MODEL: KX125 03-07 - Cast-lite flat-top piston (53.94mm)	$86.95
	0910-0256	FITS MODEL: KLX400 03-07 - Forged piston kit A (89.94mm)	$187.95
	0910-0257	FITS MODEL: KLX400 03-07 - Forged piston kit (93.95mm high compression)	$202.95
	0910-0309	FITS MODEL: KX250F 04-08 - Forged piston kit A (76.95mm piston)	$187.95
	0910-0310	FITS MODEL: KX250F 04-08 - Forged Rev dome piston kit A (82.95mm piston)	$202.95
	0910-0453	FITS MODEL: KX250F 04-08 - Forged piston kit B (76.96mm piston)	$187.95
	0910-0647	FITS MODEL: KLX400 03-07 - Forged Rev dome piston kit A (93.94mm)	$202.95
	0910-0725	FITS MODEL: KX250F 04-08 - Forged Rev dome piston kit B (82.95mm piston)	$202.95
	0910-0726	FITS MODEL: KLX400 03-07 - Forged Rev dome piston kit B (93.95mm)	$202.95
	0910-0871	FITS MODEL: KX65 06-08 - Forged piston kit A (44.45mm piston)	$59.95
	0910-0872	FITS MODEL: KX65 06-08 - Forged piston kit B (44.46mm piston)	$59.95
	0910-0873	FITS MODEL: KX65 06-08 - Forged piston kit A (49.935mm piston)	$100.95
	0910-0874	FITS MODEL: KX65 06-08 - Forged piston kit B (49.945mm piston)	$100.95
	0910-0875	FITS MODEL: KLX110 03-08 - Forged piston kit A (56.95mm piston)	$88.95
	0910-0876	FITS MODEL: KLX110 03-08 - Forged piston kit B (56.96mm piston)	$88.95
	0910-0877	FITS MODEL: KX125 03-07 - Forged piston kit A (57.935mm piston)	$200.95
	0910-0878	FITS MODEL: KX125 03-07 - Forged piston kit B (57.945mm piston)	$200.95
	0910-0879	FITS MODEL: KX450F 05-08 - Forged piston kit A (95.95mm piston)	$193.95
	0910-0880	FITS MODEL: KX450F 05-08 - Forged piston kit b (95.96mm piston)	$193.95
	0910-0881	FITS MODEL: KX450F 05-08 - Forged piston kit A (99.95mm piston)	$209.95
	0910-0882	FITS MODEL: KX450F 05-08 - Forged piston kit B (99.96mm piston)	$209.95
	0931-0012	FITS MODEL: KX125 03-07 - Works cylinder kit	$662.95
	0931-0015	FITS MODEL: KLX400 03-07 - Cylinder kit (90mm stock bore)	$727.95
	0931-0016	FITS MODEL: KLX400 03-07 - Cylinder kit (94mm big bore) 435cc	$762.95
	0931-0025	FITS MODEL: KX250F 04-08 - Cylinder kit (77mm stock bore)	$693.95
	0931-0026	FITS MODEL: KX250F 04-08 - Cylinder kit (83mm) 290cc	$779.95
	0931-0106	FITS MODEL: KX65 06-08 - Cylinder kit (44.5mm)	$537.95
	0931-0107	FITS MODEL: KX65 06-08 - Cylinder kit (50mm)	$634.95
	0931-0108	FITS MODEL: KLX110 03-08 - Cylinder kit (57mm)	$399.95
	0931-0109	FITS MODEL: KX125 03-07 - Cylinder kit (58mm big bore)	$819.95
	0931-0110	FITS MODEL: KX450F 05-08 - Cylinder kit (96mm)	$721.95
	0931-0111	FITS MODEL: KX450F 05-08 - Cylinder kit (100mm)	$805.95
	0934-0190	FITS MODEL: KX125 03-07 - Gasket kit	$37.95
	0934-0194	FITS MODEL: KLX400 03-07 - Gasket kit	$91.95
	0934-0358	FITS MODEL: KX250F 04-08 - Gasket kit (77mm)	$69.95
	0934-0359	FITS MODEL: KX250F 04-08 - Gasket kit (83mm)	$69.95
	0934-1519	FITS MODEL: KLX110 03-08 - Top-end gasket kit	$43.95
	0934-1532	FITS MODEL: KX65 06-08 - Gasket kit	$28.95
	0934-1533	FITS MODEL: KX65 06-08 - Gasket kit	$29.95
	0934-1534	FITS MODEL: KLX110 03-08 - Gasket kit	$30.95
	0934-1535	FITS MODEL: KX450F 05-08 - Gasket kit	$52.95
	0934-1536	FITS MODEL: KX450F 05-08 - Gasket kit	$60.95
Suzuki
	Part #	Description	Price
	0910-0180	FITS MODEL: DR-Z400 00-07 - Forged piston kit B (89.95mm)	$187.95
	0910-0181	FITS MODEL: DR-Z400 00-07 - Forged piston kit C (89.96mm)	$187.95
	0910-0182	FITS MODEL: DR-Z400 00-07 - Forged piston kit (90mm)	$187.95
	0910-0256	FITS MODEL: DR-Z400 00-07 - Forged piston kit A (89.94mm)	$187.95
	0910-0257	FITS MODEL: DR-Z400 00-07 - Forged piston kit (93.95mm high compression)	$202.95
	0910-0309	FITS MODEL: RM-Z250 04-06 - Forged piston kit A (76.95mm piston)	$187.95
	0910-0310	FITS MODEL: RM-Z250 04-06 - Forged Rev dome piston kit A (82.95mm piston)	$202.95
	0910-0453	FITS MODEL: RM-Z250 04-06 - Forged piston kit B (76.96mm piston)	$187.95
	0910-0647	FITS MODEL: DR-Z400 00-07 - Forged Rev dome piston kit A (93.94mm)	$202.95
	0910-0725	FITS MODEL: RM-Z250 04-06 - Forged Rev dome piston kit B (82.95mm piston)	$202.95
	0910-0726	FITS MODEL: DR-Z400 00-07 - Forged Rev dome piston kit B (93.95mm)	$202.95
	0910-0883	FITS MODEL: RM-Z250 07-08 - Forged piston kit A (82.95mm)	$171.95
	0910-0884	FITS MODEL: RM-Z250 07-08 - Forged piston kit B (82.96mm)	$171.95
	0910-0885	FITS MODEL: RM-Z450 05-06 - Forged piston kit A (99.95mm piston)	$217.95
	0910-0886	FITS MODEL: RM-Z450 05-06 - Forged piston kit B (99.96mm piston)	$217.95
	0931-0015	FITS MODEL: DR-Z400 00-07 - Cylinder kit (90mm)	$727.95
	0931-0016	FITS MODEL: DR-Z400 00-07 - Cylinder kit (94mm) 435cc	$762.95
	0931-0025	FITS MODEL: RM-Z250 04-06 - Cylinder kit (77mm stock bore)	$727.95
	0931-0026	FITS MODEL: RM-Z250 04-06 - Cylinder kit (83mm) 290cc	$818.95
	0931-0112	FITS MODEL: RM-Z250 07-08 - Cylinder kit (83mm)	$781.95
	0931-0113	FITS MODEL: RM-Z450 05-06 - Cylinder kit (95.5mm)	$738.95
	0931-0114	FITS MODEL: RM-Z450 05-06 - Cylinder kit (100mm)	$788.95
	0934-0194	FITS MODEL: DR-Z400 00-07 - Gasket kit	$91.95
	0934-0359	FITS MODEL: RM-Z250 04-06 - Gasket kit (83mm)	$69.95
	0934-1537	FITS MODEL: RM-Z250 07-08 - Gasket kit	$48.95
	0934-1538	FITS MODEL: RM-Z450 05-06 - Gasket kit	$57.95
Yamaha
	Part #	Description	Price
	0910-0175	FITS MODEL: YZ250F 01-07 - Forged piston kit A (76.94mm)	$202.95
	0910-0176	FITS MODEL: YZ250F 01-07 - Forged piston kit B (76.95mm)	$202.95
	0910-0177	FITS MODEL: YZ250F 01-07 - Forged piston kit C (76.96mm)	$202.95
	0910-0178	FITS MODEL: YZ250F 01-07 - Forged piston kit (79mm)	$202.95
	0910-0190	FITS MODEL: YZ450F 03-05 - Forged piston kit A (94.94mm)	$187.95
	0910-0190	FITS MODEL: WR450F 06-08 - Forged piston kit A (94.94mm)	$187.95
	0910-0190	FITS MODEL: YZ450F 06-08 - Forged piston kit A (94.94mm)	$187.95
	0910-0191	FITS MODEL: YZ450F 03-05 - Forged piston kit B (94.95mm)	$187.95
	0910-0191	FITS MODEL: WR450F 06-08 - Forged piston kit B (94.95mm)	$187.95
	0910-0191	FITS MODEL: YZ450F 06-08 - Forged piston kit B (94.95mm)	$187.95
	0910-0192	FITS MODEL: YZ450F 03-05 - Forged piston kit C (94.96mm)	$187.95
	0910-0192	FITS MODEL: WR450F 06-08 - Forged piston kit C (94.96mm)	$187.95
	0910-0192	FITS MODEL: YZ450F 06-08 - Forged piston kit C (94.96mm)	$187.95
	0910-0304	FITS MODEL: YZ450F 03-05 - Forged Rev dome piston kit A (97.94mm)	$202.95
	0910-0304	FITS MODEL: WR450F 06-08 - Forged Rev dome piston kit A (97.94mm)	$202.95
	0910-0304	FITS MODEL: YZ450F 06-08 - Forged Rev dome piston kit A (97.94mm)	$202.95
	0910-0308	FITS MODEL: YZ250F 01-07 - Forged Rev dome piston kit A (82.95mm)	$202.95
	0910-0644	FITS MODEL: YZ450F 03-05 - Forged piston kit A (94.94mm high compression 13.6:1)	$187.95
	0910-0644	FITS MODEL: WR450F 06-08 - Forged piston kit A (94.94mm high compression 13.6:1)	$187.95
	0910-0644	FITS MODEL: YZ450F 06-08 - Forged piston kit A (94.94mm high compression 13.6:1)	$187.95
	0910-0645	FITS MODEL: YZ450F 03-05 - Forged piston kit B (94.94mm high compression 13.6:1)	$187.95
	0910-0645	FITS MODEL: WR450F 06-08 - Forged piston kit B (94.94mm high compression 13.6:1)	$187.95
	0910-0645	FITS MODEL: YZ450F 06-08 - Forged piston kit B (94.94mm high compression 13.6:1)	$187.95
	0910-0648	FITS MODEL: YZ125 97-04 - Cast piston kit A (57.94)	$200.95
	0910-0648	FITS MODEL: YZ125 05-08 - Cast piston kit A (57.94)	$200.95
	0910-0669	FITS MODEL: YZ125 97-04 - Cast-lite flat-top piston (53.94mm)	$150.95
	0910-0727	FITS MODEL: YZ250F 01-07 - Forged Rev dome piston kit B (82.96mm)	$202.95
	0910-0728	FITS MODEL: YZ450F 03-05 - Forged Rev dome piston kit B (97.95mm)	$202.95
	0910-0728	FITS MODEL: WR450F 06-08 - Forged Rev dome piston kit B (97.95mm)	$202.95
	0910-0728	FITS MODEL: YZ450F 06-08 - Forged Rev dome piston kit B (97.95mm)	$202.95
	0931-0019	FITS MODEL: YZ450F 03-05 - Cylinder kit (95mm)	$753.95
	0931-0020	FITS MODEL: YZ450F 03-05 - Cylinder kit (98mm) 478cc	$814.95
	0931-0023	FITS MODEL: YZ250F 01-07 - Cylinder kit (77mm)	$693.95
	0931-0024	FITS MODEL: YZ250F 01-07 - Cylinder kit (83mm) 290cc	$779.95
	0931-0095	FITS MODEL: YZ125 05-08 - Works cylinder kit (54mm stock bore; high compression)	$735.95
	0931-0096	FITS MODEL: YZ125 05-08 - Works cylinder kit (58mm big bore; high compression) 144cc	$819.95
	0931-0097	FITS MODEL: WR450F 06-08 - Works cylinder kit (95mm stock bore) 478cc	$753.95
	0931-0097	FITS MODEL: YZ450F 06-08 - Works cylinder kit (95mm stock bore) 478cc	$753.95
	0931-0098	FITS MODEL: WR450F 06-08 - Works cylinder kit (98mm big bore)	$814.95
	0931-0098	FITS MODEL: YZ450F 06-08 - Works cylinder kit (98mm big bore)	$814.95
	0931-0117	FITS MODEL: YZ125 97-04 - Cylinder kit (58mm big bore) 125cc	$819.95
	0934-0354	FITS MODEL: YZ450F 03-05 - Gasket kit (95mm)	$78.95
	0934-0355	FITS MODEL: YZ450F 03-05 - Gasket kit (98mm)	$81.95
	0934-0356	FITS MODEL: YZ250F 01-07 - Gasket kit (77mm)	$55.95
	0934-0357	FITS MODEL: YZ250F 01-07 - Gasket kit (83mm)	$60.95
	0934-1055	FITS MODEL: YZ125 05-08 - Gasket kit	$38.95
	0934-1055	FITS MODEL: YZ125 05-08 - Gasket kit	$38.95
	0934-1056	FITS MODEL: WR450F 06-08 - Gasket kit	$81.95
	0934-1056	FITS MODEL: YZ450F 06-08 - Gasket kit	$81.95
	0934-1057	FITS MODEL: WR450F 06-08 - Gasket kit	$81.95
	0934-1057	FITS MODEL: YZ450F 06-08 - Gasket kit	$81.95
	400485100003	FITS MODEL: YZ125 97-04 - Works cylinder kit	$639.95
	400485100008	FITS MODEL: YZ125 97-04 - Race cylinder kit	$573.95
	400485160003	FITS MODEL: YZ125 97-04 - Gasket kit	$37.95
	410485302007	FITS MODEL: YZ125 97-04 - Race piston kit	$92.95

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