{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"695e8d41a20f","name":"PISTON KIT 98MM YAMAHA YZ/WR 450 03-15, ATHENA S4F09800005A 478CC BIG BORE","sku":"56-K114_98.PIA","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":223.7,"formatted":"£223.70"},"summary":"ATHENA Forged Racing Piston Ø 97.94 mm for Athena Big Bore Cylinder - S4F09800005A. This 450cc piston is crafted from a special high-performance aluminum alloy with high silicon content, ensuring OE-level reliability and enhanced resistance and performance. Produced with cutting-edge CNC machining tools, it features dimensional tolerances of less than 0.01 mm. Some piston skirts include a molybdenum disulfide coating applied by screen printing to reduce friction, further enhancing performance and durability. The piston rings are produced in Japan with wear-resistant coatings (PVD or chromium nitride) for increased lifespan and durability, adapting perfectly to the cylinder liner. This kit includes the piston, pin, circlips, and piston rings, all of which are replaceable and interchangeable. Technical features: Big End Pin Diameter 18x9x51 mm, Bore Diameter 97.94 mm, Compression Height 23.50 mm, Compression Ratio 12.4:1, Displacement 450 cc, Net Weight 0.39 Kg, Number Of Segments 2, Piston Pin Type Biconical, Piston Type Forged. All components are replaceable and interchangeable.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"98mm"},{"label":"Variant Id","value":"298395"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K114_5F98_2EPIA/f5ea432e7ab8eb82.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-K114_5F98_2EPIA/f5ea432e7ab8eb82.jpg"],"description":"ATHENA Forged Racing Piston Ø 97.94 mm for Athena Big Bore Cylinder - S4F09800005A. This 450cc piston is crafted from a special high-performance aluminum alloy with high silicon content, ensuring OE-level reliability and enhanced resistance and performance. Produced with cutting-edge CNC machining tools, it features dimensional tolerances of less than 0.01 mm. Some piston skirts include a molybdenum disulfide coating applied by screen printing to reduce friction, further enhancing performance and durability. The piston rings are produced in Japan with wear-resistant coatings (PVD or chromium nitride) for increased lifespan and durability, adapting perfectly to the cylinder liner. This kit includes the piston, pin, circlips, and piston rings, all of which are replaceable and interchangeable. Technical features: Big End Pin Diameter 18x9x51 mm, Bore Diameter 97.94 mm, Compression Height 23.50 mm, Compression Ratio 12.4:1, Displacement 450 cc, Net Weight 0.39 Kg, Number Of Segments 2, Piston Pin Type Biconical, Piston Type Forged. All components are replaceable and interchangeable.","descriptionMarkdown":"### Athena Forged Big Bore Piston Kit 98mm\n\n Upgrade your motorcycle's performance with this high-quality forged piston kit from Athena. Engineered for big bore applications, this kit is designed to deliver exceptional reliability and enhanced power output. Athena, a leader in motorcycle spare parts with over 40 years of experience, crafts these pistons using advanced CNC machining for precise dimensional accuracy, ensuring tolerances of less than 0.01 mm.\n\n Constructed from a special high-performance aluminum alloy with a high silicon content, these pistons offer superior durability and performance compared to Original Equipment (OE) parts. The meticulously smooth profile promotes optimal airflow and efficient combustion, contributing to a noticeable performance improvement.\n\n Some piston skirts feature a molybdenum disulfide coating applied via screen printing. This treatment further reduces friction, leading to enhanced performance and extended durability. Athena's commitment to quality is evident as each piston is engineered in Italy and rigorously tested on engine dynamometers and on track in extreme conditions to validate its performance and reliability.\n\n This piston kit includes the piston, pin, circlips, and piston rings. The included piston rings are manufactured in Japan with wear-resistant coatings, such as PVD or chromium nitride, to maximize lifespan and ensure optimal performance by maintaining a precise fit against the cylinder liner, even under low tangential load.\n\n **Key Features:**\n\n \n- Forged piston for superior strength and performance.\n \n- Precision manufactured with tolerances of less than 0.01 mm.\n \n- High-performance aluminum alloy with high silicon content.\n \n- Smooth piston profile for improved airflow and combustion.\n \n- Optional molybdenum disulfide coating on skirts to reduce friction.\n \n- Includes piston, pin, circlips, and high-quality Japanese piston rings.\n \n- Engineered and tested for reliability in extreme conditions.\n\n **Technical Specifications:**\n\n \n- Piston Type: Forged\n \n- Bore Diameter: 97.94 mm\n \n- Compression Height: 23.50 mm\n \n- Compression Ratio: 12.4:1\n \n- Displacement: 450 cc\n \n- Number Of Segments (Piston Rings): 2\n \n- Piston Pin Type: Biconical\n \n- Big End Pin Diameter: 18x9x51 mm\n \n- Net Weight: 0.39 Kg","weightGrams":null,"fitments":[],"collections":[{"name":"Engine","url":"https://www.2brosparts.com/api/agent/collection/GB/engine"},{"name":"Pistons & Kits","url":"https://www.2brosparts.com/api/agent/collection/GB/pistons-kits"}],"links":{"page":"https://www.2brosparts.com/products/piston-kit-98mm-yamaha-yzwr-450-03-15-athena-s4f09800005a-478cc-big-bore","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/695e8d41a20f:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/695e8d41a20f:1"}},"market":{"country":"GB","countryName":"United Kingdom","locale":"en-gb","currency":"GBP","exchangeRateFromGbp":1,"pricesIncludeUkVat":true,"checkoutTax":null,"delivery":[{"name":"Standard","description":"Orders £15.00–£59.99 · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":4.99,"formatted":"£4.99"},"free":false,"minimumOrder":{"amount":0,"formatted":"£0.00","gbp":0},"weightGrams":null},{"name":"Standard","description":"Orders £60.00 and up · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":0,"formatted":"£0.00"},"free":true,"minimumOrder":{"amount":60,"formatted":"£60.00","gbp":60},"weightGrams":null}],"storeUrl":"https://www.2brosparts.com"},"navigate":{"start":"https://www.2brosparts.com/api/agent","search":"https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus}"},"howToBuy":{"summary":"Build a basket for the shopper and give them one checkout link. Every URL is a plain path (no query string) and a GET. Nothing is stored between calls.","checkoutLinkFormat":"https://www.2brosparts.com/api/agent/checkout/GB/{basketKey}:{quantity},{basketKey}:{quantity}","steps":["1. Find products: follow links in these responses, or fetch https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus} (e.g. https://www.2brosparts.com/api/agent/search/GB/brake+pads). Every product has a basketKey.","2. Optional check: https://www.2brosparts.com/api/agent/basket/GB/{basketKey}:{quantity},{basketKey}:{quantity} returns stock, totals per delivery option and the checkout link.","3. Give the shopper the checkout link. Opening it fills their basket with exactly these items (replacing what was there) and opens checkout for United Kingdom. They pay on 2brosparts.com through Stripe."],"noFetchNeeded":"You can write the checkout link yourself from basketKeys and quantities; nothing has to be fetched first. Each product also has links.buyOneNow, a ready link for one unit.","stateless":"Nothing is saved on our side. The items part of the URL is the whole basket: to change it, write the link again with the new list.","itemsFormat":"basketKey:quantity pairs joined by commas, e.g. 04f24aad4d68:2,7c1e9a0b3f2d:1. Quantity defaults to 1. Up to 50 products, 100 each.","country":"GB is the shopper's delivery country. Swap it for theirs (US, DE, FR…) in any URL; currency, tax and delivery follow it.","tips":["Put everything the shopper wants in one link.","Optionally add your name as a last path segment on checkout links (…/checkout/GB/<items>/claude) so the sale is credited to you.","The checkout link is for the shopper's browser. Do not open it yourself.","Signed-in trade account holders see their trade prices at checkout."]}}