Offroad Catalog
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- Clutch Kits
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- Crank Bearing & Seal Kits
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CYLINDER KITS
Features
- 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
- 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
- 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
Images
Honda
| Part # | Description | Retail |
|---|---|---|
| 0931-0093 | FITS MODEL: CRF250R 04-08 - Works cylinder kit (78mm stock bore) 250cc | $727.95 |
| 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 |
| 0934-1053 | FITS MODEL: CRF250R 04-08 - Gasket kit | $60.95 |
| 0931-0094 | FITS MODEL: CRF250R 04-08 - Works cylinder kit (82mm big bore) 280cc | $848.95 |
| 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 |
| 0934-1054 | FITS MODEL: CRF250R 04-08 - Gasket kit | $69.95 |
| 0931-0013 | FITS MODEL: CRF450R 02-08 - Works cylinder kit (96mm stock bore) | $753.95 |
| 0910-0254 | FITS MODEL: CRF450R 02-08 - Forged piston kit (95.95mm) | $187.95 |
| 0934-0191 | FITS MODEL: CRF450R 02-08 - Gasket kit | $98.95 |
| 0910-0254 | FITS MODEL: CRF450X 05-07 - Forged piston kit (95.95mm) | $187.95 |
| 0934-0191 | FITS MODEL: CRF450X 05-07 - Gasket kit | $98.95 |
| 0931-0014 | FITS MODEL: CRF450R 02-08 - Works cylinder kit (100mm big bore) 490cc | $796.95 |
| 0910-0255 | FITS MODEL: CRF450R 02-08 - Forged piston kit A (99.95mm, 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 |
| 0910-0723 | FITS MODEL: CRF450R 02-08 - Forged Rev dome (99.96mm, 11.6:1 compression) | $202.95 |
| 0934-0192 | FITS MODEL: CRF450R 02-08 - Gasket kit | $98.95 |
| 0931-0102 | FITS MODEL: CRF450X 05-07 - Cylinder kit (big bore) | $755.95 |
| 0934-1528 | FITS MODEL: CRF450X 05-07 - Gasket kit | $64.95 |
| 0931-0103 | FITS MODEL: CRF450X 05-07 - Cylinder kit (100mm big bore) 490cc | $799.95 |
| 0934-1529 | FITS MODEL: CRF450X 05-07 - Gasket kit | $72.95 |
Kawasaki
| Part # | Description | Retail |
|---|---|---|
| 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 |
| 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 |
| 0934-1532 | FITS MODEL: KX65 06-08 - Gasket kit | $28.95 |
| 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 |
| 0934-1533 | FITS MODEL: KX65 06-08 - Gasket kit | $29.95 |
| 0931-0108 | FITS MODEL: KLX110 03-08 - Cylinder kit (57mm) | $399.95 |
| 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 |
| 0934-1519 | FITS MODEL: KLX110 03-08 - Top-end gasket kit | $43.95 |
| 0934-1534 | FITS MODEL: KLX110 03-08 - Gasket kit | $30.95 |
| 0931-0012 | FITS MODEL: KX125 03-07 - Works cylinder kit | $662.95 |
| 0931-0109 | FITS MODEL: KX125 03-07 - Cylinder kit (58mm big bore) | $819.95 |
| 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 |
| 0910-0253 | FITS MODEL: KX125 03-07 - Cast-lite flat-top piston (53.94mm) | $86.95 |
| 0934-0190 | FITS MODEL: KX125 03-07 - Gasket kit | $37.95 |
| 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 |
| 0910-0309 | FITS MODEL: KX250F 04-08 - Forged piston kit A (76.95mm piston) | $187.95 |
| 0910-0453 | FITS MODEL: KX250F 04-08 - Forged piston kit B (76.96mm piston) | $187.95 |
| 0910-0310 | FITS MODEL: KX250F 04-08 - Forged Rev dome piston kit A (82.95mm piston) | $202.95 |
| 0910-0725 | FITS MODEL: KX250F 04-08 - Forged Rev dome piston kit B (82.95mm piston) | $202.95 |
| 0934-0358 | FITS MODEL: KX250F 04-08 - Gasket kit (77mm) | $69.95 |
| 0934-0359 | FITS MODEL: KX250F 04-08 - Gasket kit (83mm) | $69.95 |
| 0931-0015 | FITS MODEL: KLX400 03-07 - Cylinder kit (90mm stock bore) | $727.95 |
| 0910-0256 | FITS MODEL: KLX400 03-07 - Forged piston kit A (89.94mm) | $187.95 |
| 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 |
| 0931-0016 | FITS MODEL: KLX400 03-07 - Cylinder kit (94mm big bore) 435cc | $762.95 |
| 0910-0257 | FITS MODEL: KLX400 03-07 - Forged piston kit (93.95mm high compression) | $202.95 |
| 0910-0647 | FITS MODEL: KLX400 03-07 - Forged Rev dome piston kit A (93.94mm) | $202.95 |
| 0910-0726 | FITS MODEL: KLX400 03-07 - Forged Rev dome piston kit B (93.95mm) | $202.95 |
| 0934-0194 | FITS MODEL: KLX400 03-07 - Gasket kit | $91.95 |
| 0931-0110 | FITS MODEL: KX450F 05-08 - Cylinder kit (96mm) | $721.95 |
| 0931-0111 | FITS MODEL: KX450F 05-08 - Cylinder kit (100mm) | $805.95 |
| 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 |
| 0934-1535 | FITS MODEL: KX450F 05-08 - Gasket kit | $52.95 |
| 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 |
| 0934-1536 | FITS MODEL: KX450F 05-08 - Gasket kit | $60.95 |
Suzuki
| Part # | Description | Retail |
|---|---|---|
| 0931-0025 | FITS MODEL: RM-Z250 04-06 - Cylinder kit (77mm stock bore) | $693.95 |
| 0931-0026 | FITS MODEL: RM-Z250 04-06 - Cylinder kit (83mm) 290cc | $779.95 |
| 0910-0309 | FITS MODEL: RM-Z250 04-06 - Forged piston kit A (76.95mm piston) | $187.95 |
| 0910-0453 | FITS MODEL: RM-Z250 04-06 - Forged piston kit B (76.96mm piston) | $187.95 |
| 0910-0310 | FITS MODEL: RM-Z250 04-06 - Forged Rev dome piston kit A (82.95mm piston) | $202.95 |
| 0910-0725 | FITS MODEL: RM-Z250 04-06 - Forged Rev dome piston kit B (82.95mm piston) | $202.95 |
| 0934-0358 | FITS MODEL: RM-Z250 04-06 - Gasket kit (77mm) | $69.95 |
| 0934-0359 | FITS MODEL: RM-Z250 04-06 - Gasket kit (83mm) | $69.95 |
| 0931-0112 | FITS MODEL: RM-Z250 07-08 - Cylinder kit (83mm) | $781.95 |
| 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 |
| 0934-1537 | FITS MODEL: RM-Z250 07-08 - Gasket kit | $48.95 |
| 0931-0015 | FITS MODEL: DR-Z400 00-07 - Cylinder kit (90mm) | $727.95 |
| 0910-0256 | FITS MODEL: DR-Z400 00-07 - Forged piston kit A (89.94mm) | $187.95 |
| 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 |
| 0931-0016 | FITS MODEL: DR-Z400 00-07 - Cylinder kit (94mm) 435cc | $762.95 |
| 0910-0257 | FITS MODEL: DR-Z400 00-07 - Forged piston kit (93.95mm high compression) | $202.95 |
| 0910-0647 | FITS MODEL: DR-Z400 00-07 - Forged Rev dome piston kit A (93.94mm) | $202.95 |
| 0910-0726 | FITS MODEL: DR-Z400 00-07 - Forged Rev dome piston kit B (93.95mm) | $202.95 |
| 0934-0194 | FITS MODEL: DR-Z400 00-07 - Gasket kit | $91.95 |
| 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 |
| 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 |
| 0934-1538 | FITS MODEL: RM-Z450 05-06 - Gasket kit | $57.95 |
Yamaha
| Part # | Description | Retail |
|---|---|---|
| 400485100003 | FITS MODEL: YZ125 97-04 - Works cylinder kit | $639.95 |
| 400485100008 | FITS MODEL: YZ125 97-04 - Race cylinder kit | $573.95 |
| 0931-0117 | FITS MODEL: YZ125 97-04 - Cylinder kit (58mm big bore) 125cc | $819.95 |
| 410485302007 | FITS MODEL: YZ125 97-04 - Race piston kit | $92.95 |
| 0910-0669 | FITS MODEL: YZ125 97-04 - Cast-lite flat-top piston (53.94mm) | $150.95 |
| 0910-0648 | FITS MODEL: YZ125 97-04 - Cast piston kit A (57.94) | $200.95 |
| 400485160003 | FITS MODEL: YZ125 97-04 - Gasket kit | $37.95 |
| 0931-0095 | FITS MODEL: YZ125 05-08 - Works cylinder kit (54mm stock bore; high compression) | $735.95 |
| 0934-1055 | FITS MODEL: YZ125 05-08 - Gasket kit | $38.95 |
| 0931-0096 | FITS MODEL: YZ125 05-08 - Works cylinder kit (58mm big bore; high compression) 144cc | $819.95 |
| 0910-0648 | FITS MODEL: YZ125 05-08 - Cast piston kit A (57.94) | $200.95 |
| 0934-1055 | FITS MODEL: YZ125 05-08 - Gasket kit | $38.95 |
| 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 |
| 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 |
| 0910-0308 | FITS MODEL: YZ250F 01-07 - Forged Rev dome piston kit A (82.95mm) | $202.95 |
| 0910-0727 | FITS MODEL: YZ250F 01-07 - Forged Rev dome piston kit B (82.96mm) | $202.95 |
| 0934-0356 | FITS MODEL: YZ250F 01-07 - Gasket kit (77mm) | $55.95 |
| 0934-0357 | FITS MODEL: YZ250F 01-07 - Gasket kit (83mm) | $60.95 |
| 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 |
| 0910-0190 | FITS MODEL: YZ450F 03-05 - Forged piston kit A (94.94mm) | $187.95 |
| 0910-0191 | FITS MODEL: YZ450F 03-05 - Forged piston kit B (94.95mm) | $187.95 |
| 0910-0192 | FITS MODEL: YZ450F 03-05 - 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 |
| 0910-0728 | FITS MODEL: YZ450F 03-05 - Forged Rev dome piston kit B (97.95mm) | $202.95 |
| 0910-0644 | FITS MODEL: YZ450F 03-05 - 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 |
| 0934-0354 | FITS MODEL: YZ450F 03-05 - Gasket kit (95mm) | $78.95 |
| 0934-0355 | FITS MODEL: YZ450F 03-05 - Gasket kit (98mm) | $81.95 |
| 0931-0097 | FITS MODEL: WR450F 06-08 - Works cylinder kit (95mm stock bore) 478cc | $753.95 |
| 0910-0190 | FITS MODEL: WR450F 06-08 - Forged piston kit A (94.94mm) | $187.95 |
| 0910-0191 | FITS MODEL: WR450F 06-08 - Forged piston kit B (94.95mm) | $187.95 |
| 0910-0192 | FITS MODEL: WR450F 06-08 - Forged piston kit C (94.96mm) | $187.95 |
| 0910-0644 | FITS MODEL: WR450F 06-08 - Forged piston kit A (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 |
| 0934-1056 | FITS MODEL: WR450F 06-08 - Gasket kit | $81.95 |
| 0931-0098 | FITS MODEL: WR450F 06-08 - Works cylinder kit (98mm big bore) | $814.95 |
| 0910-0304 | FITS MODEL: WR450F 06-08 - Forged Rev dome piston kit A (97.94mm) | $202.95 |
| 0910-0728 | FITS MODEL: WR450F 06-08 - Forged Rev dome piston kit B (97.95mm) | $202.95 |
| 0934-1057 | FITS MODEL: WR450F 06-08 - Gasket kit | $81.95 |
| 0931-0097 | FITS MODEL: YZ450F 06-08 - Works cylinder kit (95mm stock bore) 478cc | $753.95 |
| 0910-0190 | FITS MODEL: YZ450F 06-08 - Forged piston kit A (94.94mm) | $187.95 |
| 0910-0191 | FITS MODEL: YZ450F 06-08 - Forged piston kit B (94.95mm) | $187.95 |
| 0910-0192 | FITS MODEL: YZ450F 06-08 - Forged piston kit C (94.96mm) | $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 06-08 - Forged piston kit B (94.94mm high compression 13.6:1) | $187.95 |
| 0934-1056 | FITS MODEL: YZ450F 06-08 - Gasket kit | $81.95 |
| 0931-0098 | FITS MODEL: YZ450F 06-08 - Works cylinder kit (98mm big bore) | $814.95 |
| 0910-0304 | FITS MODEL: YZ450F 06-08 - Forged Rev dome piston kit A (97.94mm) | $202.95 |
| 0910-0728 | FITS MODEL: YZ450F 06-08 - Forged Rev dome piston kit B (97.95mm) | $202.95 |
| 0934-1057 | FITS MODEL: YZ450F 06-08 - Gasket kit | $81.95 |
Descriptions and notes
0931-0014, 0931-0016: This Athena cylinder kit assembled with OE CDI and exhaust gets much more torque (Nxm) than OE bike; in order to strongly increase horsepower to the wheel, it is necessary to use, at least, a racing exhaust system. 400485100003: YZ125 97-98 models require the use of a 99 or newer exhaust pipe and silencer. 400485100008: To use on 97-98 models you must use a 99 exhaust and an 01 cylinder head; for 99-00 models you must use an 01 cylinder head.
This item appears on page 942 of the OffRoad Catalog