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

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 (2021–2023)

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

Product form

Athena big bore cylinder full kit (part reference P400485100105) for Yamaha YZ F 250 applications, increasing displacement via an 85... Read more

1 in stock 1-2 business days

£701.81 Incl. VAT

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    SKU: 56-K250.85.KIT2
    Barcode: 0120000080977

    • Free shipping on all orders above £75
    • No hassle returns within 30 days

    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 (2021–2023)

    Shipping & Delivery

    How long will my item take to arrive?

    Orders are typically dispatched within 1 working day and are shipped on a 24hour (non-guaranteed) service.

    Where do you ship to?

    We currently only ship orders within the UK.

    How can I track my order?

    Once your order has been dispatched, you will receive a tracking code. Tracking information is emailed to the email address that was provided when placing the order.

    Can I collect my order?

    Unfortunately we do not offer order collections from our fulfilment centre.

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