{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"927e4003fbfc","name":"PISTON KIT YFM YFB250 72.50, WOSSNER FORGED 8659D150","sku":"56-W4675+150.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":182.4,"formatted":"£182.40"},"summary":"Wossner 72.50mm Bore Piston Kit part number 8659D150 is a high-performance forged piston designed for Yamaha models. This piston optimizes heat transfer and features an elliptical design for even load distribution, preventing localized pressure and piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance. Features include high-strength forged construction, optimized heat transfer, and an elliptical design for even thrust load distribution. Specifications include a 72.50mm bore size, 72.44mm actual bore diameter, OEM compression ratio of 9.50:1, 229cc displacement, 58.00mm stroke, 0.06mm clearance, -4.70cm³ dome volume, and 23.80mm compression height. Cross-reference OEM part numbers include Lock P/N CW16, Pin P/N WP041, and Ring Set P/N 725XDS.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"72.5mm"},{"label":"Variant Id","value":"255891"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4675_2B150_2EWO/f22e493ec9548a8d.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4675_2B150_2EWO/f22e493ec9548a8d.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W4675_2B150_2EWO/c1bc64aed7840258.jpg"],"description":"Wossner 72.50mm Bore Piston Kit part number 8659D150 is a high-performance forged piston designed for Yamaha models. This piston optimizes heat transfer and features an elliptical design for even load distribution, preventing localized pressure and piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance. Features include high-strength forged construction, optimized heat transfer, and an elliptical design for even thrust load distribution. Specifications include a 72.50mm bore size, 72.44mm actual bore diameter, OEM compression ratio of 9.50:1, 229cc displacement, 58.00mm stroke, 0.06mm clearance, -4.70cm³ dome volume, and 23.80mm compression height. Cross-reference OEM part numbers include Lock P/N CW16, Pin P/N WP041, and Ring Set P/N 725XDS.","descriptionMarkdown":"### Wossner Forged Piston Kit for Yamaha 250cc Engines\n\n Upgrade your Yamaha engine with this high-performance Wossner Forged Piston Kit. Designed for optimal power and durability, this kit is engineered to meet the demands of performance enthusiasts. The forged construction provides superior strength and resilience, ensuring reliable operation under demanding conditions.\n\n This piston kit features an advanced elliptical design that promotes even load distribution across the piston surface. This intelligent design minimizes localized pressure points, helping to prevent piston collapse and extend engine life. Furthermore, the piston is optimized for heat transfer, contributing to improved combustion efficiency and consistent engine performance. Manufactured in Germany, this piston meets high standards of quality and precision.\n\n **Key Features:**\n\n \n- High-strength forged piston construction for maximum durability.\n \n- Elliptical design ensures even thrust load distribution, reducing stress.\n \n- Optimized heat transfer for enhanced combustion efficiency.\n \n- Precision manufactured in Germany for superior quality.\n \n- Maintains OEM compression ratio for reliable engine operation.\n\n **Specifications:**\n\n \n- Bore Size: 72.50mm\n \n- Actual Bore Diameter: 72.44mm\n \n- Compression Ratio: OEM (9.50:1)\n \n- Displacement: 229cc\n \n- Stroke: 58.00mm\n \n- Clearance: 0.06mm\n \n- Dome Volume: -4.70cm&sup3;\n \n- Compression Height: 23.80mm\n\n **Included Components:**\n\n \n- Piston\n \n- Lock P/N: CW16\n \n- Pin P/N: WP041\n \n- Ring Set P/N: 725XDS","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-yfm-yfb250-7250-wossner-forged-8659d150","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/927e4003fbfc:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/927e4003fbfc: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."]}}