{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"4abb44ebf4fd","name":"PISTON KIT 96-09 TTR250 74.00, FORGED WOSSNER 8646D100","sku":"56-W198+100.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":195.02,"formatted":"£195.02"},"summary":"Piston Kit 74.00mm Bore 73.95 Wossner 8646D100 (+1.00). Wossner forged pistons are superior in strength and design. Engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls. 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 No. 56-W198+100.WO. Lock P/N CW18. Pin P/N WP031. Ring Set P/N 740XDS. Display (cm3) 124. Hub stroke (mm) 59.60. Clearance (mm) 0.05. Wossner compression Ratio: OEM. OEM Compression ratio: 10.20:1. Dome volume (cm3) +1.40. Compression height (mm) 23.60. Theoretical weight (G) 304.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"74mm"},{"label":"Variant Id","value":"254955"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock53901_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock53901_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock53901_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock53901_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock53901_4.jpg"],"description":"Piston Kit 74.00mm Bore 73.95 Wossner 8646D100 (+1.00). Wossner forged pistons are superior in strength and design. Engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls. 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 No. 56-W198+100.WO. Lock P/N CW18. Pin P/N WP031. Ring Set P/N 740XDS. Display (cm3) 124. Hub stroke (mm) 59.60. Clearance (mm) 0.05. Wossner compression Ratio: OEM. OEM Compression ratio: 10.20:1. Dome volume (cm3) +1.40. Compression height (mm) 23.60. Theoretical weight (G) 304.","descriptionMarkdown":"### Wossner Forged Piston Kit 74.00mm Bore (+1.00) for Yamaha TTR250\n\nUpgrade your engine's performance and durability with this premium Wossner forged piston kit. Designed for precise fitment and engineered for superior strength, this kit is manufactured to exacting standards in Germany.\n\n**Key Features:**\n\n \n- Forged Strength: Wossner forged pistons offer exceptional strength and superior design compared to cast alternatives, ensuring longevity and reliability.\n \n- Advanced Heat Transfer: Engineered to optimize combustion chamber heat transfer to the cylinder walls, promoting efficient operation and reducing stress.\n \n- Elliptical Design: The pistons feature an elliptical profile that provides a more uniform bearing surface under heat expansion. This design eliminates localized pressure points and distributes thrust loads evenly, preventing piston collapse and ensuring a consistent seal.\n \n- High-Quality Components: Includes lock pin (P/N CW18), pin (P/N WP031), and ring set (P/N 740XDS) for a complete installation.\n \n- Precision Sizing: This kit is for a 74.00mm bore, with a +1.00mm oversize.\n \n- OEM Compression Ratio: Designed to match the original equipment manufacturer's (OEM) compression ratio of 10.20:1 for seamless integration.\n \n- Specific Dimensions: Features a dome volume of +1.40 cm³, a compression height of 23.60mm, a hub stroke of 59.60mm, and a clearance of 0.05mm.\n\nThis Wossner piston kit represents a significant upgrade for the Yamaha TTR250, delivering enhanced performance and durability through advanced engineering and high-quality materials.","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-96-09-ttr250-7400-forged-wossner-8646d100","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/4abb44ebf4fd:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/4abb44ebf4fd: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."]}}