Athena Cylinder Kits

Mission MX Shop / Engine Parts / Athena Cylinder Kits
Factory Cylinder Kit for Yamaha YZ125cc 05-06

Factory Cylinder Kit for Yamaha YZ125cc 05-06


Bore 54mm/Stroke 54.5mm/Displacement 124.82cc/35.3HP @ 11,000RPM
Aluminium cylinder with nickel-carbide coating.
Ported to Factory 'Works' specifications.
Specially designed high performance hard anodised power valves (will not fit original cylinder)
Specially designed high performance forged OEM piston.
Special gasket kit including seals & hardware. 

Price:   £628.50

Big Bore 144cc Cylinder Kit for Yamaha YZ125cc 05-06

Big Bore 144cc Cylinder Kit for Yamaha YZ125cc 05-06


Bore 58mm/Stroke 54.5mm/Displacement 144cc
Aluminium cylinder with nickel-carbide coating.
Specially designed high performance hard anodised power valves (will not fit original cylinder)
Specially designed high performance cast-lite flat top piston.
Special gasket kit including seals & hardware. 

Price:   £628.50

Big Bore 290cc Cylinder Kit for Yamaha YZ/WR 250F 01-06

Big Bore 290cc Cylinder Kit for Yamaha YZ/WR 250F 01-06


Bore 83mm/Stroke 53.6mm/Displacement 290cc/36.9HP @ 9,800RPM
Aluminium cylinder with nickel-carbide coating.
Designed with wider water jackets.
Forged piston with molybdenum coating.
Special gasket kit. 

Price:   £481.99

Big Bore 478cc Cylinder Kit for Yamaha YZ 450F 03-06

Big Bore 478cc Cylinder Kit for Yamaha YZ 450F 03-06


Bore 98mm/Stroke 63.4mm/Displacement 478.2cc/56HP @ 8,500RPM
Aluminium cylinder with nickel-carbide coating.
Designed with wider water jackets.
Forged piston with molybdenum coating.
Special gasket kit. 

Price:   £481.99

Factory Cylinder Kit for Kawasaki KX125cc 03-06

Factory Cylinder Kit for Kawasaki KX125cc 03-06


Bore 54mm/Stroke 54.5mm/Displacement 124.82cc/35.5HP @ 11,000RPM
Aluminium cylinder with internal special steel tube and nickel-carbide coating.
Ported to Factory 'Works' specifications.
Aluminium cylinder head with removable bronze dome allowing for higher compression and anti-detonation features.
Specially designed high performance hard anodised power valves (will not fit original cylinder)
Specially designed high performance cast-lite flat top piston.
Special gasket kit. 

Price:   £628.50

Big Bore 290cc Cylinder Kit for Kawasaki KXF/RMZ 250 04-06

Big Bore 290cc Cylinder Kit for Kawasaki KXF/RMZ 250 04-06


Bore 83mm/Stroke 53.6mm/Displacement 290cc/36.3HP @ 10,400RPM
Aluminium cylinder with nickel-carbide coating.
Designed with wider water jackets.
Forged piston with molybdenum coating.
Special gasket kit. 

Price:   £481.99

Model 
Big Bore 280cc Cylinder Kit for Honda CRF 250R/X 04-06

Big Bore 280cc Cylinder Kit for Honda CRF 250R/X 04-06


Bore 82mm/Stroke 52.2mm/Displacement 275.7cc/38HP @ 10,300RPM
Aluminium cylinder with internal steel tube and nickel-carbide coating.
Designed with wider water jackets.
Forged piston with molybdenum coating.
Special gasket kit. 

Price:   £499.99

Big Bore 490cc Cylinder Kit for Honda CRF 450 02-06

Big Bore 490cc Cylinder Kit for Honda CRF 450 02-06


Bore 100mm/Stroke 62.1mm/Displacement 487.7cc/62.8HP @ 8,500RPM
Aluminium cylinder with internal steel tube and nickel-carbide coating.
Designed with wider water jackets.
Forged piston with molybdenum coating.
Special gasket kit. 

Price:   £481.99

Model