{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"9e948866672a","name":"PISTON KIT 02-04 YZ125 56.00, WOSSNER 8072D200 YAMAHA MX","sku":"56-W797_200.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":125.4,"formatted":"£125.40"},"summary":"Wossner piston kit with 56.00mm bore and 55.94mm actual piston diameter. This forged piston is designed for Yamaha YZ125 models and features a +2.00mm oversize for robust performance, enhanced heat dissipation, and structural reliability in high-demand 2-stroke engine applications. The piston is constructed from forged material for superior strength and longevity, facilitates optimal heat transfer, and has an elliptical profile for consistent bearing surface during thermal expansion. It ensures even distribution of thrust loads to prevent localized pressure and piston collapse. Manufactured in Germany. Specifications include: Bore 56.00mm, Piston Diameter 55.94mm, Display (cm³) 125, Stroke (mm) 54.50, Clearance (mm) 0.06, Compression Height (mm) 28.00, Wossner Compression Ratio 2-stroke, OEM Compression Ratio 2-stroke. Cross-reference OEM part numbers: 5NY-11631-01-D0, 5NY-11631-01-C0, 5NY-11631-01-B0, 5NY-11631-01-A0, Ring: 5NY-11611-00-00, Pin: 5UN-11633-00-00, Circlip: 93450-16068-00. Included components: Lock CW15, Pin WP032, Ring Set RSB5600, Rod P2017. Part Number: 56-W797.200.WO (Piston PN# 8072D200). Weight: 205 grams.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"56.0mm"},{"label":"Variant Id","value":"257783"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock56729_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock56729_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock56729_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock56729_3.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock56729_4.jpg"],"description":"Wossner piston kit with 56.00mm bore and 55.94mm actual piston diameter. This forged piston is designed for Yamaha YZ125 models and features a +2.00mm oversize for robust performance, enhanced heat dissipation, and structural reliability in high-demand 2-stroke engine applications. The piston is constructed from forged material for superior strength and longevity, facilitates optimal heat transfer, and has an elliptical profile for consistent bearing surface during thermal expansion. It ensures even distribution of thrust loads to prevent localized pressure and piston collapse. Manufactured in Germany. Specifications include: Bore 56.00mm, Piston Diameter 55.94mm, Display (cm³) 125, Stroke (mm) 54.50, Clearance (mm) 0.06, Compression Height (mm) 28.00, Wossner Compression Ratio 2-stroke, OEM Compression Ratio 2-stroke. Cross-reference OEM part numbers: 5NY-11631-01-D0, 5NY-11631-01-C0, 5NY-11631-01-B0, 5NY-11631-01-A0, Ring: 5NY-11611-00-00, Pin: 5UN-11633-00-00, Circlip: 93450-16068-00. Included components: Lock CW15, Pin WP032, Ring Set RSB5600, Rod P2017. Part Number: 56-W797.200.WO (Piston PN# 8072D200). Weight: 205 grams.","descriptionMarkdown":"### Wossner 56.00mm Oversize Piston Kit for Yamaha YZ125\n\nUpgrade your Yamaha YZ125's performance with this high-quality Wossner forged piston kit. Designed for the 2002-2004 models, this piston features a 56.00mm bore and a 55.94mm actual diameter, representing a +2.00mm oversize. Its forged construction offers superior strength, enhanced heat dissipation, and exceptional reliability for demanding 2-stroke applications.\n\n**Key Features:**\n\n \n- Forged piston construction for superior strength and longevity.\n \n- Optimizes heat transfer from the combustion chamber to the cylinder walls.\n \n- Elliptical piston profile ensures a consistent bearing surface during thermal expansion.\n \n- Even distribution of thrust loads prevents localized pressure and piston collapse.\n \n- Precision manufactured in Germany for exceptional quality.\n\n**Specifications:**\n\n \n- Bore: 56.00mm\n \n- Piston Diameter: 55.94mm\n \n- Engine Displacement: 125 cm&sup3;\n \n- Stroke: 54.50mm\n \n- Clearance: 0.06mm\n \n- Compression Height: 28.00mm\n \n- Wossner Compression Ratio: 2-stroke\n \n- OEM Compression Ratio: 2-stroke\n\n**Included Components:**\n\n \n- Lock: CW15\n \n- Pin: WP032\n \n- Ring Set: RSB5600\n \n- Rod: P2017\n \n- Part Number: (Piston PN# 8072D200)","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-02-04-yz125-5600-wossner-8072d200-yamaha-mx","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/9e948866672a:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/9e948866672a: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."]}}