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CYLINDER FULL KIT 85mm YAMAHA YZ 250F 21-23, ATHENA P400485100105 304CC BIG BORE, (Piston included)

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CYLINDER FULL KIT 85mm YAMAHA YZ 250F 21-23, ATHENA P400485100105 304CC BIG BORE, (Piston included)

CYLINDER FULL KIT 85mm YAMAHA YZ 250F 21-23, ATHENA P400485100105 304CC BIG BORE, (Piston included)

Athena big bore cylinder full kit (part reference P400485100105) for Yamaha YZ F 250 applications, increasing displacement via an 85 mm bore to 304 cc. Supplied with high-grade cylinder, forged piston with pin and rings, complete gaskets, and a pre-mapped GET Boost module that installs without ECU or wiring modifications to suit this configuration.



Features





  • Big bore cylinder kit to increase displacement and deliver higher torque and power across the RPM range




  • Cylinder manufactured from high-silicon aluminium alloy with an oversized steel liner




  • Steel liner fused using co-casting process for heat transfer and combustion sealing




  • Forged piston, CNC-machined




  • Molybdenum disulphide piston coating to reduce friction




  • DLC-coated piston pin for hardness and durability




  • Piston rings and pin included




  • Complete gasket set included




  • MLS head gasket, laser-cut stainless steel




  • GET Boost electronic module included, pre-calibrated for this kit




  • GET Boost installs without ECU or wiring modifications




  • Dedicated harness connects to injector and throttle body




  • Pre-mapped to suit the new cylinder configuration




  • Piston included




  • Athena part reference: P400485100105





Specifications





  • Bore diameter: 85.00 mm




  • Displacement: 304.00 cc





Vehicle Fitments





  • YAMAHA YZ F 250 cc (2021ā€“2023)





Ā 

$1,477.71
CYLINDER FULL KIT 85mm YAMAHA YZ 250F 21-23, ATHENA P400485100105 304CC BIG BORE, (Piston included)ā€”
$1,477.71

Product Information

Shipping & Returns

Description

Athena big bore cylinder full kit (part reference P400485100105) for Yamaha YZ F 250 applications, increasing displacement via an 85 mm bore to 304 cc. Supplied with high-grade cylinder, forged piston with pin and rings, complete gaskets, and a pre-mapped GET Boost module that installs without ECU or wiring modifications to suit this configuration.



Features





  • Big bore cylinder kit to increase displacement and deliver higher torque and power across the RPM range




  • Cylinder manufactured from high-silicon aluminium alloy with an oversized steel liner




  • Steel liner fused using co-casting process for heat transfer and combustion sealing




  • Forged piston, CNC-machined




  • Molybdenum disulphide piston coating to reduce friction




  • DLC-coated piston pin for hardness and durability




  • Piston rings and pin included




  • Complete gasket set included




  • MLS head gasket, laser-cut stainless steel




  • GET Boost electronic module included, pre-calibrated for this kit




  • GET Boost installs without ECU or wiring modifications




  • Dedicated harness connects to injector and throttle body




  • Pre-mapped to suit the new cylinder configuration




  • Piston included




  • Athena part reference: P400485100105





Specifications





  • Bore diameter: 85.00 mm




  • Displacement: 304.00 cc





Vehicle Fitments





  • YAMAHA YZ F 250 cc (2021ā€“2023)





Ā 

CYLINDER FULL KIT 85mm YAMAHA YZ 250F 21-23, ATHENA P400485100105 304CC BIG BORE, (Piston included) | SMXOFFROAD Ltd