{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"ebf475ee529b","name":"PISTON KIT 97-01 CR250 66.40, WOSSNER 8161DB 1-RING","sku":"56-W703+00B.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":153.68,"formatted":"£153.68"},"summary":"Wossner forged piston kit 8161DB is a +0.01 oversize piston designed for 1-ring configuration Honda CR250R models from 1997 to 2001. With a 66.41 mm bore and 66.35 mm actual piston diameter, this German-made piston is crafted for high durability and optimised thermal and mechanical performance, using Wossner's elliptical piston design. Features include forged piston construction for strength and longevity, elliptical shape that distributes thermal and mechanical loads evenly, and superior heat transfer from the combustion chamber to the cylinder walls. Made in Germany for precision engineering. Specifications: Bore Size 66.41 mm, Actual Piston Diameter 66.35 mm, Displacement 290 cm³, Stroke 72.00 mm, Clearance 0.06 mm, Compression Ratio 2-stroke (Wossner and OEM), Compression Height 38.00 mm. Cross-reference component part numbers: Piston Kit 8161DB, Lock CW18, Pin WP033, Ring Set RSB6640, Rod P2021.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"66.40mm"},{"label":"Variant Id","value":"257515"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock56461_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock56461_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock56461_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock56461_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock56461_4.jpg"],"description":"Wossner forged piston kit 8161DB is a +0.01 oversize piston designed for 1-ring configuration Honda CR250R models from 1997 to 2001. With a 66.41 mm bore and 66.35 mm actual piston diameter, this German-made piston is crafted for high durability and optimised thermal and mechanical performance, using Wossner's elliptical piston design. Features include forged piston construction for strength and longevity, elliptical shape that distributes thermal and mechanical loads evenly, and superior heat transfer from the combustion chamber to the cylinder walls. Made in Germany for precision engineering. Specifications: Bore Size 66.41 mm, Actual Piston Diameter 66.35 mm, Displacement 290 cm³, Stroke 72.00 mm, Clearance 0.06 mm, Compression Ratio 2-stroke (Wossner and OEM), Compression Height 38.00 mm. Cross-reference component part numbers: Piston Kit 8161DB, Lock CW18, Pin WP033, Ring Set RSB6640, Rod P2021.","descriptionMarkdown":"### Wossner 8161DB 1-Ring Forged Piston Kit +0.01 Oversize\n\nUpgrade your motorcycle's performance and durability with the Wossner 8161DB 1-ring forged piston kit. This premium piston is engineered with a +0.01 oversize to precisely fit specific Honda CR250R models. Crafted in Germany, Wossner utilizes advanced forging techniques and an elliptical piston design to ensure optimal thermal and mechanical performance.\n\nThe forged construction provides exceptional strength and longevity, while the innovative elliptical shape effectively distributes thermal and mechanical loads, leading to superior heat transfer from the combustion chamber to the cylinder walls. This results in a more efficient and reliable engine.\n\n**Key Features:**\n\n \n- Forged piston construction for enhanced strength and extended lifespan.\n \n- Unique elliptical design promotes even distribution of thermal and mechanical stress.\n \n- Optimized for superior heat transfer, contributing to efficient engine operation.\n \n- Precision-engineered and manufactured in Germany.\n \n- Designed for a 1-ring configuration for specific engine applications.\n\n**Specifications:**\n\n \n- Bore Size: 66.41 mm\n \n- Actual Piston Diameter: 66.35 mm\n \n- Displacement: 290 cm&sup3;\n \n- Stroke: 72.00 mm\n \n- Clearance: 0.06 mm\n \n- Compression Ratio: 2-stroke (compatible with Wossner and OEM specifications)\n \n- Compression Height: 38.00 mm\n\n**Included Components:**\n\n \n- Piston Kit: 8161DB\n \n- Lock: CW18\n \n- Pin: WP033\n \n- Ring Set: RSB6640","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-97-01-cr250-6640-wossner-8161db-1-ring","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/ebf475ee529b:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/ebf475ee529b: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."]}}