BIG BORE CYLINDER KIT 23-27 YAMAHA YZ 450 F ATHENA P400485100108 102 mm BORE 497 CC DLC

The Athena Big Bore Cylinder Kit is a replacement top-end assembly developed for the Yamaha YZ 450 F. It increases engine displacement to provide stronger power delivery and improved engine response while retaining a controllable power character. The cylinder, piston, wrist pin and revised compression ratio are engineered as a system around the original engine architecture.

Features

• Lightweight piston reduces reciprocating mass and the loads transmitted to the connecting rod while retaining strength for high-performance operation.


• DLC-coated wrist pin is designed to withstand increased loads and resist surface wear.


• Reinforced cylinder is designed to withstand the increased mechanical loads of the big bore configuration.


• Revised compression ratio supports balanced, controllable response on motocross tracks and technical terrain.

Specifications

• Cylinder bore: 102 mm.


• Displacement: 497 cc.


• Wrist pin coating: DLC (Diamond-Like Carbon).


• Wrist pin manufactured in Italy.

Cross-Reference OEM Part Numbers

• Athena: P400485100108.

Vehicle Fitments

• Yamaha YZ F 450 cc (YZ 450 F): 2023–2027.