Athena Big Bore Cylinder Kits for 2 stroke and 4 stroke engines

2 Stroke Big Bore kits

Big Bore Race cylinder kits include a nickel carbide coated cylinder ported to factory works specs. special hard anodized exhaust valves, complete Big Bore piston kit, and a top end gasket set. Factory cylinder kits include all parts in the race kits plus an aluminum cylinder head removable brass dome allowing for higher compression and anti detonating features.

4 Stroke Big Bore kits

Available in standard bore and big bore sizes, 4 stroke kits include a nikel coated cylinder designed with wider water jackets, complete piston kit and top end gasket.

Big Bore Kits

Athena big bore cylinder kit Kawasaki KX450F 100mm big bore 05-08 Code: 68-4401 Price: $691.74 Quantity in Basket: none

Athena cylinder kit Honda CRF450R/X 96mm standard bore 02-06 Code: 68-4700 Price: $647.34 Quantity in Basket: none

Athena cylinder kit Honda CRF450R 100mm big bore 02-06 Code: 68-4710 Price: $684.73 Quantity in Basket: none

Athena cylinder kit Honda CRF250R/X 78mm std 04-06 Code: 68-4721 Price: $625.14 Quantity in Basket: none

Athena cylinder kit Honda CRF250R/X 82mm big bore 04-06 Code: 68-4730 Price: $729.13 Quantity in Basket: none

Athena cylinder kit Honda CRF450X 96mm big bore 05-07 Code: 68-4750 Price: $649.67 Quantity in Basket: none

Athena big bore cylinder kit Honda CRF450X 100mm big bore 05-07 Code: 68-4755 Price: $687.07 Quantity in Basket: none

Athena cylinder kit Kawasaki KX125 54mm 03-06 Code: 68-4800 Price: $594.75 Quantity in Basket: none

Athena cylinder kit Kawasaki KX250F,Suzuki RMZ250 77mm standard bore 04-06 Code: 68-4820 Price: $594.75 Quantity in Basket: none

Athena cylinder kit Kawasaki KX250F,Suzuki RMZ250 83mm big bore 04-06 Code: 68-4840 Price: $669.54 Quantity in Basket: none

Athena cylinder kit Yamaha YZ125 54mm 96-04 Code: 68-4860 Price: $550.35 Quantity in Basket: none

Athena cylinder kit Yamaha YZ125 54mm 01-04 Code: 68-4870 Price: $493.10 Quantity in Basket: none

Athena cylinder kit Yamaha YZ/WR250F 77mm standard bore 01-06 Code: 68-4880 Price: $594.75 Quantity in Basket: none

Athena cylinder kit Yamaha YZ/WR250F 83mm big bore 01-06 Code: 68-4890 Price: $669.54 Quantity in Basket: none

Athena cylinder kit Yamaha YZ450F 95mm standard bore 03-05 Code: 68-4900 Price: $647.34 Quantity in Basket: none

Athena cylinder kit Yamaha YZ450F 98mm big bore 03-05 Code: 68-4910 Price: $699.91 Quantity in Basket: none

Athena cylinder kit Yamaha YZ125 54mm standard bore 05-06 Code: 68-4920 Price: $632.15 Quantity in Basket: none

Athena cylinder kit Yamaha YZ125 58mm big bore 05-06 Code: 68-4930 Price: $670.71 Quantity in Basket: none

Athena cylinder kit Yamaha YZ450F 95mm 06 Code: 68-4940 Price: $647.34 Quantity in Basket: none

Athena cylinder kit Yamaha YZ450F 98mm 06 Code: 68-4990 Price: $699.91 Quantity in Basket: none

Cylinder Works Big Bore kit Honda CRF250R/X 04-08 +3mm 81mm Code: 422-11001K Price: $455.70 Quantity in Basket: none

Cylinder Works Big Bore kit Honda CRF450R 02-08 +4mm 99mm 488cc Code: 422-11002K Price: $455.70 Quantity in Basket: none

Cylinder Works Big Bore kit Honda CRF150R 07-08 +2mm 68mm 159cc Code: 422-11004K Price: $455.70 Quantity in Basket: none

Cylinder Works Big Bore kit Yamaha WR450F 03-06, YZ450F 03-05 Code: 422-21001K2 Price: $455.70 Quantity in Basket: none

Cylinder Works Big Bore kit Yamaha YZ250F 01-08, WR250F 01-06 Code: 422-21002K Price: $455.70 Quantity in Basket: none

Cylinder Works Big Bore kit Yamaha YZ450F 06-09 Code: 422-21003K Price: $455.70 Quantity in Basket: none