ATHENA Cylinder Kit - Ø98 mm for Yamaha YFZ450 (Manufacturer part number: P400485100016) — a thermal assembly designed for quad modifications. This kit is aimed at riders and tuners looking for a complete solution, compliant with ATHENA standards, to replace or increase the engine displacement of their YFZ450.

• Aluminum cylinder treated with nickel-carbide for a durable sliding surface.
• Optimized cooling circuit design for better heat dissipation.
• High-performance exhaust valves suited for high RPMs.
• Bronze cylinder head dome for durable mechanical retention.
• Forged piston with skirts treated with molybdenum disulfide to reduce friction.
• Bore diameter: Ø 98 mm — suitable for modifications on Yamaha YFZ450.
• Referenced spare parts: piston 9460DA/DB and upper gasket set 604454.

Delivered complete: piston, rings, circlips, pin, gasket set, and, depending on the version, cylinder head and exhaust valves. Installation and adjustments should be performed by a professional or experienced tuner to ensure optimal compatibility and longevity.

Compatible with: YAMAHA YFZ 450 2WD (2012, 2013) and YFZ 450 SPECIAL EDITION 2009. Product intended for quad use and engine modifications.