Athena piston kit O 72mm - Athena big Bore Cylinder Kit

€2,045.00
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ATHENA Cylinder Kit

Unlock the full potential of your Yamaha YZ 250 with Athena's Extreme Big Bore Kit, designed to increase displacement and deliver more torque and power across the entire RPM range. This kit is ideal for riders seeking to enhance their engine's performance beyond stock limits while preserving the agility and responsiveness that make the YZF 250 a top choice in off-road racing.

Performance upgrade for Yamaha YZ 250

The kit includes a high-grade aluminum cylinder with an oversized steel liner, a forged performance piston with pin and rings, and all necessary gaskets. Developed through Athena's extensive racing experience, this kit ensures smooth and powerful power delivery at all RPMs.

GET Boost module included for optimized performance

The kit features the GET Boost electronic module, developed by Athena's GET division, renowned for its work with top MXGP and AMA teams. Pre-calibrated for this specific setup, GET Boost installs easily without ECU or wiring modifications, unlocking the full potential of your engine.

Easy installation and seamless integration

GET Boost connects directly to the injector and throttle body via a dedicated harness. The module is pre-mapped to deliver safe, reliable performance with a power curve tailored to the new cylinder.

Advanced construction and materials

The cylinder is made from high-silicon aluminum alloy with a steel liner fused using Athena's proprietary co-casting process, ensuring optimal heat transfer and combustion sealing. The forged piston, CNC-machined and coated with molybdenum disulfide, offers reduced friction and enhanced durability. The DLC-coated pin ensures maximum hardness and reliability.

High-quality gaskets included

The MLS (Multi-layer Steel) head gasket is laser-cut from stainless steel to ensure perfect sealing and long-term durability, even under extreme conditions.
  • Oversized cylinder with high-performance forged piston
  • Includes pre-mapped GET Boost module for easy install.
  • Advanced materials for superior strength and reliability.
  • Premium gaskets ensure perfect and lasting sealing.
MAKE MODEL YEAR
Yamaha YZ 250 2003-2026

  1. Store Pickup

    In case you are visiting Greece for work or vacation you can pick up your orders from our store at 47, Kallirois Str, Athens, Greece.

    Our opening hours are: Monday-Wednesday 09:00-17:00 and Tuesday-Thursday-Friday 09:00-19:00. For more information you may contact our sales department by phone at +30 2109902382 or send us an email at [email protected]

    Caution
    Under no circumstances, should you start for collection IF YOU HAVE NOT placed an order on our site or YOU HAVE NOT received the relevant confirmation for your order.

  2. Worldwide Shipments

    • Free shipping for orders over €200
    • For orders under €200 there is an additional transportation fee depending on the customers country and city which is calculated on the checkout.

  3. Delivery time

    We would like to inform you that Drakos Engineering ships all orders sealed. In case you received your order in an open or damaged package, please do not accept it and contact the sales department immediately!

    Caution
    he desired delivery time is not binding for the courier and may not be followed:

    • Transport and delivery of shipments by Express service usually takes up to 2 working days.
    • Transport and delivery of shipments by Standard service usually takes up to 7 working days.
    • Δυσπρόσιτες Περιοχές αφορά μεταφορά και παράδοση αποστολών προς περιοχές εκτός ορίων των κύριων πόλεων και ο ενδεικτικός χρόνος παράδοσης είναι 1-4 εργάσιμες ημέρες.

  4. Returns and Replacements

    The customer is under no circumstances obliged to receive packaging that is damaged or opened during transport. In case of acceptance of the parcel by the customer, the company has no obligation to change any damaged item or replace any loss since the goods by any means of transport always travel at the sole responsibility of the customer.

    The return must be made no later than within fourteen (14) working days of both the product and the price. Delivery charges are non-refundable and the customer must bear the costs of returning the products. A necessary condition for any return is that the product is in the condition you received it, without its packaging having been opened. Please keep in mind that returns are not accepted without prior customer contact by phone or email within 14 calendar days of receiving the product.

    Our company is obliged to honor the guarantee given by the on branded items and to replace any defective product. In this case the product is replaced without any charge on the part of the customer. A necessary condition is the presentation of the original purchase document.

    In the case of a wrong order, where the customer is responsible, Drakos Engineering is not obliged to replace the product, nevertheless we advise you to contact us by phone at +30 2109902382 or by e-mail at [email protected].

    In case of wrong shipments where the company is responsible, all transport costs are charged to our company and not to the customer.