{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"d58792d8b6dc","name":"PISTON KIT B 77MM SUZUKI RM-Z 250 10-25, ATHENA S5F07700004B","sku":"56-W951.B.ATH","brand":"Athena","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":5,"price":{"amount":166.55,"formatted":"£166.55"},"summary":"Forged piston kit B 77mm for Athena and OE cylinders. This Athena piston is manufactured using reverse extrusion and cutting-edge CNC machining tools, ensuring dimensional tolerances of less than 0.01 mm. Constructed from a special high-performance aluminum alloy with high silicon content, these pistons offer the same reliability as OE pistons with increased resistance and excellent performance. The smooth profile promotes regular flow and perfect flame propagation. Some piston skirts feature a molybdenum disulfide coating applied by screen printing to reduce friction, enhancing performance and durability. Each piston is engineered in Italy and tested on engine dynamometer benches and on track. The kit includes the piston, pin, circlips, and piston rings, all of which are replaceable and interchangeable. Piston rings are produced in Japan with wear-resistant coatings for increased retention and durability. Technical features: Big End Pin Diameter (mm) 16x9x40.1, Bore Diameter (mm) 76.96, Compression Height (mm) 19.70, Compression Ratio 13.4:1, Displacement (cc) 250, Net Weight (Kg) 0.18, Number Of Segments 2, Piston Pin Type Biconical, Piston Type Forged.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77.00mm"},{"label":"Variant Id","value":"289765"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W951_2EB_2EATH/60f868260f58b489.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W951_2EB_2EATH/60f868260f58b489.jpg"],"description":"Forged piston kit B 77mm for Athena and OE cylinders. This Athena piston is manufactured using reverse extrusion and cutting-edge CNC machining tools, ensuring dimensional tolerances of less than 0.01 mm. Constructed from a special high-performance aluminum alloy with high silicon content, these pistons offer the same reliability as OE pistons with increased resistance and excellent performance. The smooth profile promotes regular flow and perfect flame propagation. Some piston skirts feature a molybdenum disulfide coating applied by screen printing to reduce friction, enhancing performance and durability. Each piston is engineered in Italy and tested on engine dynamometer benches and on track. The kit includes the piston, pin, circlips, and piston rings, all of which are replaceable and interchangeable. Piston rings are produced in Japan with wear-resistant coatings for increased retention and durability. Technical features: Big End Pin Diameter (mm) 16x9x40.1, Bore Diameter (mm) 76.96, Compression Height (mm) 19.70, Compression Ratio 13.4:1, Displacement (cc) 250, Net Weight (Kg) 0.18, Number Of Segments 2, Piston Pin Type Biconical, Piston Type Forged.","descriptionMarkdown":"### Athena Forged Piston Kit B - 77mm Bore\n\n This Athena Piston Kit is engineered for high-performance off-road motorcycles, offering a durable and reliable upgrade for your engine. Crafted using a specialized high-silicon aluminum alloy and advanced reverse extrusion techniques, these pistons are built to meet or exceed Original Equipment (OE) standards.\n\n Each piston is manufactured with precision CNC machining, ensuring dimensional tolerances of less than 0.01 mm for optimal fit and function. The smooth piston profile promotes consistent airflow and efficient flame propagation, contributing to improved combustion. Some piston skirts feature a molybdenum disulfide coating, applied via screen printing, to further reduce friction, enhance performance, and extend durability.\n\n Athena's commitment to quality is evident in their rigorous testing process, including engine dynamometer and track validation, to ensure performance in the most demanding conditions. The included piston rings are produced in Japan with wear-resistant coatings (PVD or chromium nitride) for increased retention and longevity, adapting perfectly to the cylinder liner even under low tangential load.\n\n This kit includes the piston, pin, circlips, and piston rings, with all components being replaceable and interchangeable.\n\n#### Key Features:\n\n \n- Forged Piston Type: Constructed from a high-performance aluminum alloy for superior strength and resistance.\n \n- Precision Machining: CNC machined to tight tolerances for optimal performance and fit.\n \n- Reduced Friction: Special alloy and optional skirt coatings minimize friction for enhanced power and durability.\n \n- High-Quality Rings: Japanese-made rings with wear-resistant coatings ensure longevity and optimal sealing.\n \n- Complete Kit: Includes piston, pin, circlips, and piston rings.\n \n- Engineered in Italy: Designed and tested by Athena's R&D department for validated performance.\n\n#### Technical Specifications:\n\n \n- Bore Diameter: 76.96 mm\n \n- Compression Height: 19.70 mm\n \n- Compression Ratio: 13.4:1\n \n- Displacement: 250 cc\n \n- Number of Piston Segments: 2\n \n- Piston Pin Type: Biconical\n \n- Big End Pin Diameter: 16x9x40.1 mm\n \n- Net Weight: 0.18 Kg","weightGrams":null,"fitments":[{"make":"SUZUKI","model":"RM-Z 250","cc":null,"notes":null,"years":"2010–2025"}],"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-b-77mm-suzuki-rm-z-250-10-25-athena-s5f07700004b","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/d58792d8b6dc:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/d58792d8b6dc: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."]}}