{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"b7fa5feb80c4","name":"PISTON KIT 02-04 YZ125 54.00 A, WOSSNER 8072DA YAMAHA MX 5NY-11631-01-D0","sku":"56-W797.A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":115.06,"formatted":"£115.06"},"summary":"Wossner 54.00mm A piston kit with forged construction for 2-stroke engines. Features 53.94mm actual piston diameter, elliptical design for uniform bearing surface, and efficient heat transfer. Manufactured in Germany. Bore: 54.00mm, Piston Diameter: 53.94mm, Display (cm³): 125, Stroke (mm): 54.50, Clearance (mm): 0.06, Compression Height (mm): 28.00. Cross-reference OEM Part Numbers: 5NY-11631-01-D0, 5NY-11631-01-C0, 5NY-11631-01-B0, 5NY-11631-01-A0, 797M05400, 09104787. Includes Lock: CW15, Pin: WP032, Ring Set: RSB5400, Rod: P2017. Part Number: 56-W797.A.WO (Piston PN# 8072DA). Weight: 180g.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"54.0mm"},{"label":"Variant Id","value":"257772"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock56718_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock56718_1.jpg"],"description":"Wossner 54.00mm A piston kit with forged construction for 2-stroke engines. Features 53.94mm actual piston diameter, elliptical design for uniform bearing surface, and efficient heat transfer. Manufactured in Germany. Bore: 54.00mm, Piston Diameter: 53.94mm, Display (cm³): 125, Stroke (mm): 54.50, Clearance (mm): 0.06, Compression Height (mm): 28.00. Cross-reference OEM Part Numbers: 5NY-11631-01-D0, 5NY-11631-01-C0, 5NY-11631-01-B0, 5NY-11631-01-A0, 797M05400, 09104787. Includes Lock: CW15, Pin: WP032, Ring Set: RSB5400, Rod: P2017. Part Number: 56-W797.A.WO (Piston PN# 8072DA). Weight: 180g.","descriptionMarkdown":"### Wossner Piston Kit for Yamaha YZ125 (2002-2004)\n\nUpgrade your Yamaha YZ125's performance with this high-quality Wossner piston kit. Engineered for durability and optimal power delivery, this kit is designed for 2-stroke engines operating under demanding conditions.\n\n#### Key Features:\n\n\t\n- Forged Construction: Provides exceptional strength and structural integrity for enhanced longevity.\n\t\n- Optimized Heat Transfer: Promotes efficient cooling from the combustion chamber to the cylinder walls, maintaining consistent performance.\n\t\n- Elliptical Design: Ensures a uniform bearing surface, even under thermal expansion, leading to smoother operation.\n\t\n- Even Load Distribution: Distributes thrust loads evenly, reducing localized pressure and preventing piston collapse for reliable operation.\n\t\n- German Engineering: Manufactured in Germany, ensuring precision and quality craftsmanship.\n\n#### Specifications:\n\n\t\n- Bore: 54.00mm\n\t\n- Piston Diameter: 53.94mm\n\t\n- Displacement: 125 cm&sup3;\n\t\n- Stroke: 54.50mm\n\t\n- Clearance: 0.06mm\n\t\n- Compression Height: 28.00mm\n\t\n- Wossner Compression Ratio: 2-stroke\n\t\n- OEM Compression Ratio: 2-stroke\n\n#### Cross-Reference OEM Part Numbers:\n\n\t\n- 5NY-11631-01-D0\n\t\n- 5NY-11631-01-C0\n\t\n- 5NY-11631-01-B0\n\t\n- 5NY-11631-01-A0\n\t\n- 797M05400\n\t\n- 09104787\n\t\n- Ring: 5NY-11611-00-00\n\t\n- Pin: 5UN-11633-00-00\n\t\n- Circlip: 93450-16068-00\n\n#### Included Components:\n\n\t\n- Lock: CW15\n\t\n- Pin: WP032\n\t\n- Ring Set: RSB5400\n\t\n- Rod: P2017\n\t\n- Piston Part Number: 8072DA","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"YZ 125","cc":null,"notes":null,"years":"1997–2004"}],"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-02-04-yz125-5400-a-wossner-8072da-yamaha-mx-5ny-11631-01-d0","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/b7fa5feb80c4:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/b7fa5feb80c4:1"}},"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."]}}