2Bros Parts

CYLINDER KIT 77MM YAMAHA WR/YZ 250 01-13, ATHENA EC485-011 STD BORE, (piston not included)

£351.52

4.1 Trustpilot 99.9% positive on eBay

Free UK delivery 2–4 business days

Spread the cost with Klarna 18+, T&Cs apply

1

Athena Standard Bore Cylinder Kit Ø 77 mm, 250 cc with Gaskets. Motor-nicksil coating for smoothness and wear resistance. Engineered in Italy. Developed to withstand high temperatures, pressures, and stresses. Can be installed without engine crankcase modifications. Displacement: 250 cc. Net Weight: 1.30 Kg. Part No. EC485-011.

Specifications
SKU
56-K103.77.CGA
Brand
Athena
Availability
In Stock (2)

Fitments (59)

MakeModelYear
GAS-GASEC R 2502010
GAS-GASEC R 2502011
GAS-GASEC R 2502012
GAS-GASEC R 2502013
GAS-GASEC R 2502014
GAS-GASEC R 2502015
YAMAHAWR 250F2001
YAMAHAWR 250F2002
YAMAHAWR 250F2003
YAMAHAWR 250F2004
YAMAHAWR 250F2005
YAMAHAWR 250F2006
YAMAHAWR 250F2007
YAMAHAWR 250F2008
YAMAHAWR 250F2009
YAMAHAWR 250F2010
YAMAHAWR 250F2011
YAMAHAWR 250F2012
YAMAHAWR 250F2013
YAMAHAWR 250F2014
YAMAHAWRF 2502001
YAMAHAWRF 2502002
YAMAHAWRF 2502003
YAMAHAWRF 2502004
YAMAHAWRF 2502005
YAMAHAWRF 2502006
YAMAHAWRF 2502007
YAMAHAWRF 2502008
YAMAHAWRF 2502009
YAMAHAWRF 2502010
YAMAHAWRF 2502011
YAMAHAWRF 2502012
YAMAHAWRF 2502013
YAMAHAYZ 250F2001
YAMAHAYZ 250F2002
YAMAHAYZ 250F2003
YAMAHAYZ 250F2004
YAMAHAYZ 250F2005
YAMAHAYZ 250F2006
YAMAHAYZ 250F2007
YAMAHAYZ 250F2008
YAMAHAYZ 250F2009
YAMAHAYZ 250F2010
YAMAHAYZ 250F2011
YAMAHAYZ 250F2012
YAMAHAYZ 250F2013
YAMAHAYZF 2502001
YAMAHAYZF 2502002
YAMAHAYZF 2502003
YAMAHAYZF 2502004
YAMAHAYZF 2502005
YAMAHAYZF 2502006
YAMAHAYZF 2502007
YAMAHAYZF 2502008
YAMAHAYZF 2502009
YAMAHAYZF 2502010
YAMAHAYZF 2502011
YAMAHAYZF 2502012
YAMAHAYZF 2502013
General Product Group
Engine
General Product Type
Cylinder Kits
Variant Id
252588
Delivery2–4 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Athena Standard Bore Cylinder Kit - 77mm

Enhance your motorcycle's performance with the Athena Standard Bore Cylinder Kit. Engineered in Italy, this kit is designed to provide reliable and durable operation, matching the performance of original spare parts.

The cylinder features a motor-nicksil coating, a nickel-silicon treatment developed by Athena for exceptional smoothness and wear resistance. This coating is built to withstand high temperatures, pressures, and stresses, validated through rigorous bench and road testing.

This kit includes a high-quality aluminum cylinder with a standard bore and a comprehensive gasket set. Please note that a piston is not included.

Key Features:

  • Standard bore cylinder kit for 250cc engines.
  • Durable motor-nicksil coating for optimal wear resistance and smoothness.
  • Designed and tested by Athena's R&D Department.
  • Guarantees original equipment performance and reliability.
  • Includes aluminum cylinder and gasket kit.
  • Can be installed without modifying the engine crankcase.
  • Displacement: 250 cc
  • Weight: 1.30 kg
Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.

Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.

UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details

Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy

By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.

More answers in our FAQ.

Trade pricing available

Buying parts for your business? Apply for a 2BrosParts trade account.

Apply for Trade
1