{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"11faa0897e27","name":"PISTON KIT 08-12 WR250X 77.00, COMP. 13.5:1 WOSSNER 8729DC","sku":"56-W238+00C.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":182.4,"formatted":"£182.40"},"summary":"Wossner forged piston kit with a 77.02mm bore and 76.98mm diameter. Manufactured in Germany, this piston offers superior strength and design, ensuring optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Features include forged construction, optimized heat transfer, and an elliptical design for uniform load distribution. Specifications: Bore 77.02mm, Diameter 76.98mm, Display (cm³) 249, Stroke (mm) 53.60, Clearance (mm) 0.04, Wossner Compression Ratio OEM, OEM Compression Ratio 11.80:1, Dome Volume (cm³) -5.90, Compression Height (mm) 22.90. Cross-reference OEM part numbers include Wossner Piston Yamaha WR250X (PN# 8729DC), Lock P/N: CW17, Pin P/N: WP083, Ring Set P/N: 770XAS-2. Weight 274g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77mm"},{"label":"Variant Id","value":"255149"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock54095_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock54095_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54095_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54095_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock54095_4.jpg"],"description":"Wossner forged piston kit with a 77.02mm bore and 76.98mm diameter. Manufactured in Germany, this piston offers superior strength and design, ensuring optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Features include forged construction, optimized heat transfer, and an elliptical design for uniform load distribution. Specifications: Bore 77.02mm, Diameter 76.98mm, Display (cm³) 249, Stroke (mm) 53.60, Clearance (mm) 0.04, Wossner Compression Ratio OEM, OEM Compression Ratio 11.80:1, Dome Volume (cm³) -5.90, Compression Height (mm) 22.90. Cross-reference OEM part numbers include Wossner Piston Yamaha WR250X (PN# 8729DC), Lock P/N: CW17, Pin P/N: WP083, Ring Set P/N: 770XAS-2. Weight 274g.","descriptionMarkdown":"### Wossner Forged Piston Kit - 77.02mm Bore\n\nEnhance the performance and durability of your motorcycle with this Wossner Forged Piston Kit. Precision-engineered in Germany, this kit features a 77.02mm bore and a 76.98mm diameter, designed to deliver exceptional strength and optimal heat transfer.\n\nThe advanced elliptical design ensures a uniform bearing surface, even under extreme heat expansion. This reduces localized pressure points and evenly distributes thrust loads, effectively preventing piston collapse and ensuring a longer lifespan.\n\n#### Key Features:\n\n\t\n- Forged Construction: Provides superior strength and resilience for demanding conditions.\n\t\n- Optimized Heat Transfer: Promotes efficient combustion by transferring heat effectively to cylinder walls.\n\t\n- Elliptical Design: Guarantees uniform load distribution and reduces localized pressure for enhanced reliability.\n\t\n- German Engineering: Manufactured to exacting standards in Germany for premium quality.\n\n#### Specifications:\n\n\t\n- Bore: 77.02mm\n\t\n- Diameter: 76.98mm\n\t\n- Display (cm³): 249\n\t\n- Stroke (mm): 53.60\n\t\n- Clearance (mm): 0.04\n\t\n- Wossner Compression Ratio: OEM\n\t\n- OEM Compression Ratio: 11.80:1\n\t\n- Dome Volume (cm³): -5.90\n\t\n- Compression Height (mm): 22.90\n\n#### Included Components:\n\n\t\n- Wossner Piston (PN# 8729DC)\n\t\n- Lock Ring P/N: CW17\n\t\n- Pin P/N: WP083\n\t\n- Ring Set P/N: 770XAS-2","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-08-12-wr250x-7700-comp-1351-wossner-8729dc","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/11faa0897e27:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/11faa0897e27:1"}},"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."]}}