{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"6432631fc8d6","name":"PISTON KIT 05-07 YZF250 77.00, WOSSNER 8612DB 2-RING","sku":"56-W188.B.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 77.01mm bore and two-ring design. Engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, reducing localized pressure and piston collapse. Manufactured in Germany. Features: forged piston for superior strength, two-ring design for performance and durability, optimized heat transfer to cylinder walls, elliptical design for uniform bearing surface and even thrust load distribution. Specifications: Bore 77.01mm (+0.01mm oversize), standard size piston (PN# 8612DB), lock part number CW16, pin part number WP059, ring set part number 770XAS, displacement 249 cm³, stroke 53.6mm, clearance 0.04mm, Wossner compression ratio OEM, OEM compression ratio 12.50:1, dome volume -2.80 cm³, compression height 22.20mm. Weight 268g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77mm"},{"label":"Variant Id","value":"254911"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock53857_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock53857_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock53857_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock53857_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock53857_4.jpg"],"description":"Wossner forged piston kit with a 77.01mm bore and two-ring design. Engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, reducing localized pressure and piston collapse. Manufactured in Germany. Features: forged piston for superior strength, two-ring design for performance and durability, optimized heat transfer to cylinder walls, elliptical design for uniform bearing surface and even thrust load distribution. Specifications: Bore 77.01mm (+0.01mm oversize), standard size piston (PN# 8612DB), lock part number CW16, pin part number WP059, ring set part number 770XAS, displacement 249 cm³, stroke 53.6mm, clearance 0.04mm, Wossner compression ratio OEM, OEM compression ratio 12.50:1, dome volume -2.80 cm³, compression height 22.20mm. Weight 268g.","descriptionMarkdown":"### Wossner Forged Piston Kit 77.01mm - 2 Ring\n\n\tExperience enhanced performance and durability with the Wossner Forged Piston Kit. This 2-ring piston is meticulously engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, effectively reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston kit represents precision and long-lasting quality for your motorcycle engine.\n\n#### Key Features:\n\n\t\n- Forged Piston: Offers superior strength and a robust design for demanding conditions.\n\t\n- Two-Ring Design: Engineered for optimal performance and increased durability.\n\t\n- Optimized Heat Transfer: Promotes efficient heat transfer to cylinder walls for consistent engine operation.\n\t\n- Elliptical Design: Ensures a uniform bearing surface and even thrust load distribution, reducing wear.\n\t\n- German Manufacturing: Built to high standards of precision and quality in Germany.\n\n#### Specifications:\n\n\t\n- Bore Size: 77.01mm (0.01mm oversize)\n\t\n- Piston Part Number: 8612DB (Standard size)\n\t\n- Lock Ring Part Number: CW16\n\t\n- Pin Part Number: WP059\n\t\n- Ring Set Part Number: 770XAS\n\t\n- Engine Displacement: 249 cm&sup3;\n\t\n- Stroke: 53.6mm\n\t\n- Recommended Clearance: 0.04mm\n\t\n- Dome Volume: -2.80 cm&sup3;\n\t\n- Compression Height: 22.20mm\n\t\n- Wossner Compression Ratio: OEM\n\t\n- OEM Compression Ratio: 12.50:1","weightGrams":null,"fitments":[{"make":"GAS-GAS","model":"EC F 250","cc":null,"notes":null,"years":"2010–2015"},{"make":"YAMAHA","model":"WR 250F","cc":null,"notes":null,"years":"2001–2013"},{"make":"YAMAHA","model":"WRF 250","cc":null,"notes":null,"years":"2001–2013"},{"make":"YAMAHA","model":"YZ 250F","cc":null,"notes":null,"years":"2001–2007"},{"make":"YAMAHA","model":"YZF 250","cc":null,"notes":null,"years":"2001–2007"}],"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-05-07-yzf250-7700-wossner-8612db-2-ring","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/6432631fc8d6:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/6432631fc8d6:1"}},"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. 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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."]}}