{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"620a77105810","name":"PISTON KIT 01-04 YZF250 77.00, 8572DC WOSSNER 2-RING","sku":"56-W022+00C.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":172.51,"formatted":"£172.51"},"summary":"Wossner 2-ring forged piston kit with a 77.00mm bore and 77.02mm piston size. Designed for superior strength and performance with optimized heat transfer. The elliptical design ensures uniform bearing surface under heat expansion, preventing piston collapse and distributing thrust loads evenly. Manufactured in Germany. Features include forged construction, optimized heat transfer, elliptical design, and Pro Series with a two-ring configuration. Specifications: Bore 76.98mm, Piston Size 77.02mm, Displacement 249 cm³, Stroke 53.60mm, Clearance 0.04mm, Wossner Compression Ratio 12.80:1, OEM Compression Ratio 12.50:1, Dome Volume -4.80 cm³, Compression Height 20.50mm. Cross-reference OEM part numbers: Lock CW16, Pin WP059, Ring Set 770XAS, Rod P4006 / P4005. Weight 258g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"Variant Id","value":"254288"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W022_2B00C_2EWO/42121986312c0624.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W022_2B00C_2EWO/42121986312c0624.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W022_2B00C_2EWO/61418cc6352d24cc.jpg"],"description":"Wossner 2-ring forged piston kit with a 77.00mm bore and 77.02mm piston size. Designed for superior strength and performance with optimized heat transfer. The elliptical design ensures uniform bearing surface under heat expansion, preventing piston collapse and distributing thrust loads evenly. Manufactured in Germany. Features include forged construction, optimized heat transfer, elliptical design, and Pro Series with a two-ring configuration. Specifications: Bore 76.98mm, Piston Size 77.02mm, Displacement 249 cm³, Stroke 53.60mm, Clearance 0.04mm, Wossner Compression Ratio 12.80:1, OEM Compression Ratio 12.50:1, Dome Volume -4.80 cm³, Compression Height 20.50mm. Cross-reference OEM part numbers: Lock CW16, Pin WP059, Ring Set 770XAS, Rod P4006 / P4005. Weight 258g.","descriptionMarkdown":"### Wossner Forged Piston Kit - Pro Series 2-Ring\n\nUpgrade your engine's performance and durability with this Wossner forged piston kit. Precision-engineered in Germany, this Pro Series piston is designed for superior strength and optimal heat transfer, ensuring consistent power delivery and longevity. Its advanced elliptical design effectively manages heat expansion, preventing localized pressure and distributing thrust loads evenly to avoid piston collapse.\n\n#### Key Features:\n\n\t\n- Forged construction for exceptional durability and strength\n\t\n- Engineered for efficient heat transfer from the combustion chamber to cylinder walls\n\t\n- Elliptical piston design ensures uniform bearing surface under heat expansion, preventing localized pressure and piston collapse\n\t\n- Pro Series design with a two-ring configuration for enhanced sealing and extended lifespan\n\n#### Specifications:\n\n\t\n- Bore: 76.98 mm\n\t\n- Piston Size: 77.02 mm\n\t\n- Displacement: 249 cm&sup3;\n\t\n- Stroke: 53.60 mm\n\t\n- Clearance: 0.04 mm\n\t\n- Wossner Compression Ratio: 12.80:1\n\t\n- OEM Compression Ratio: 12.50:1\n\t\n- Dome Volume: -4.80 cm&sup3;\n\t\n- Compression Height: 20.50 mm\n\n#### Included Components:\n\n\t\n- Lock: CW16\n\t\n- Pin: WP059\n\t\n- Ring Set: 770XAS\n\t\n- Rod: P4006 / P4005","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-01-04-yzf250-7700-8572dc-wossner-2-ring","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/620a77105810:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/620a77105810:1"}},"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."]}}