{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"19f6c39a8a05","name":"PISTON KIT 10-22 RMZ250 77mm B, WOSSNER SUZUKI 8781DB","sku":"56-W951.B.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":197.46,"formatted":"£197.46"},"summary":"Wossner 77.01mm B piston kit. 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. Part number 8781DB. 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: 13.60:1. OEM Compression ratio: 13.50:1. Dome volume (cm3) -2.60. Compression height (mm) 19.60. Theoretical weight (G) 224.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"77.00mm"},{"label":"Variant Id","value":"258347"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W951_2EB_2EWO/e966118647f5846e.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W951_2EB_2EWO/e966118647f5846e.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W951_2EB_2EWO/63208dfca03be7b1.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W951_2EB_2EWO/d6260c1c2bda1e70.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W951_2EB_2EWO/1831b05919f65014.jpg"],"description":"Wossner 77.01mm B piston kit. 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. Part number 8781DB. 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: 13.60:1. OEM Compression ratio: 13.50:1. Dome volume (cm3) -2.60. Compression height (mm) 19.60. Theoretical weight (G) 224.","descriptionMarkdown":"### Wossner Piston Kit for Suzuki RM-Z250\n\nThis Wossner piston kit is designed for high-performance engines, offering superior strength and advanced design. Engineered in Germany, these pistons are built to optimize combustion chamber heat transfer to the cylinder walls. The elliptical design ensures a more uniform bearing surface, even under extreme heat expansion, which helps prevent localized pressure and distributes thrust loads evenly, thus avoiding piston collapse.\n\n**Key Features:**\n\n \n- Forged pistons for exceptional strength and durability.\n \n- Engineered for optimal heat transfer to cylinder walls.\n \n- Elliptical design to manage heat expansion and distribute thrust loads evenly.\n \n- Precision manufacturing ensures a uniform bearing surface.\n \n- Made in Germany to exacting standards.\n\n**Specifications:**\n\n \n- Bore Size: 77.01mm\n \n- Piston Type: B\n \n- Part Number: 8781DB (+0.01MM)\n \n- Lock Pin Part Number: CW16\n \n- Pin Part Number: WP070\n \n- Ring Set Part Number: 770XAS-S\n \n- Engine Displacement (cm³): 249\n \n- Stroke (mm): 53.80\n \n- Clearance (mm): 0.04\n \n- Wossner Compression Ratio: 13.60:1\n \n- OEM Compression Ratio: 13.50:1\n \n- Dome Volume (cm³): -2.60\n \n- Compression Height (mm): 19.60\n \n- Theoretical Weight (G): 224","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-b-wossner-suzuki-8781db","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/19f6c39a8a05:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/19f6c39a8a05:1"}},"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."]}}