{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"0246c1a0f500","name":"PISTON KIT 10-22 RMZ250 77mm C, 8781DC WOSSNER SUZUKI","sku":"56-W951.C.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":182.86,"formatted":"£182.86"},"summary":"Wossner 8781DC Piston Kit with a 77.02mm bore and 76.98mm clearance. This Wossner forged piston is superior in strength and design, engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls. It is elliptically designed to provide a more uniform bearing surface under piston heat expansion, eliminating localized pressure and distributing thrust loads more evenly, thereby preventing piston collapse. Made in Germany. This kit includes Lock P/N CW16, Pin P/N WP070, and Ring Set P/N 770XAS-S. Display (cm3) 249. Hub stroke (mm) 53.80. Clearance (mm) 0.04. Wossner compression Ratio: 14.20:1. OEM Compression ratio: 13.20:1. Dome volume (cm3) +0.10. Compression height (mm) 29.00. Theoretical weight (G) 19.50.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77.00mm"},{"label":"Variant Id","value":"258350"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock57296_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock57296_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57296_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57296_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock57296_4.jpg"],"description":"Wossner 8781DC Piston Kit with a 77.02mm bore and 76.98mm clearance. This Wossner forged piston is superior in strength and design, engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls. It is elliptically designed to provide a more uniform bearing surface under piston heat expansion, eliminating localized pressure and distributing thrust loads more evenly, thereby preventing piston collapse. Made in Germany. This kit includes Lock P/N CW16, Pin P/N WP070, and Ring Set P/N 770XAS-S. Display (cm3) 249. Hub stroke (mm) 53.80. Clearance (mm) 0.04. Wossner compression Ratio: 14.20:1. OEM Compression ratio: 13.20:1. Dome volume (cm3) +0.10. Compression height (mm) 29.00. Theoretical weight (G) 19.50.","descriptionMarkdown":"### Wossner Piston Kit 77.02mm Bore for Suzuki RM-Z250\n\nUpgrade your Suzuki RM-Z250 engine with this high-performance Wossner Piston Kit. Engineered in Germany, Wossner forged pistons are renowned for their superior strength and advanced design, offering a significant advantage for riders seeking optimal performance and durability.\n\nThis kit features a precise 77.02mm bore diameter, with an over-size allowance of +0.02mm, ensuring a perfect fit for your engine. The piston's unique elliptical design is crucial for performance under heat expansion. It creates a more uniform bearing surface, distributing thrust loads evenly and preventing localized pressure or piston collapse. This design also facilitates efficient combustion chamber heat transfer to the cylinder walls, contributing to better engine cooling and longevity.\n\n**Key Features:**\n\n \n- Wossner forged pistons offer superior strength and design.\n \n- Engineered for optimal combustion chamber heat transfer.\n \n- Elliptical design ensures uniform bearing surfaces under heat expansion.\n \n- Distributes thrust loads evenly to prevent piston collapse.\n \n- Made in Germany for exceptional quality.\n \n- Kit includes lock pin (CW16), pin (WP070), and ring set (770XAS-S).\n \n- Compression Ratio: 14.20:1 (Wossner) compared to 13.20:1 (OEM).\n \n- Dome Volume: +0.10 cm3.\n \n- Compression Height: 29.00 mm.\n \n- Theoretical Weight: 19.50 G.\n \n- Displacement: 249 cm3.\n \n- Stroke: 53.80 mm.\n \n- Clearance: 0.04 mm.","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-10-22-rmz250-77mm-c-8781dc-wossner-suzuki","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/0246c1a0f500:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/0246c1a0f500:1"}},"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."]}}