{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"7d382f701a92","name":"PISTON KIT 1997 YZ125 54.00, WOSSNER 8117DA YAMAHA MX 4XM-11631-30-A0","sku":"56-W693.A.WO","brand":"Wossner","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":115.32,"formatted":"£115.32"},"summary":"Wossner forged piston kit for the 1997 Yamaha YZ125 with a 54.00mm standard bore. Manufactured in Germany, this piston kit is built for high mechanical strength and efficient thermal performance in two-stroke engines. Features include an elliptical piston design for uniform surface contact under heat expansion, reducing stress and the risk of piston collapse. It promotes effective combustion heat transfer to the cylinder wall for enhanced engine reliability. Kit includes forged piston, lock CW15, pin WP032, ring set RSB5400, and rod P2019. OEM reference 4XM-11631-30-A0. Bore size 54.00mm, actual diameter 53.94mm, compression height 28.00mm, stroke 54.50mm, displacement 124 cm³, piston clearance 0.06mm.","attributes":[{"label":"General Product Group","value":"Engine"},{"label":"General Product Type","value":"Pistons & Kits"},{"label":"General Size","value":"54.00mm"},{"label":"Variant Id","value":"257469"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W693_2EA_2EWO/34ea9848e03a3b1c.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W693_2EA_2EWO/34ea9848e03a3b1c.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W693_2EA_2EWO/b0f9516fb78cba44.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W693_2EA_2EWO/9d34e8c8f7793ab2.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/56-W693_2EA_2EWO/5380f142903b6757.jpg"],"description":"Wossner forged piston kit for the 1997 Yamaha YZ125 with a 54.00mm standard bore. Manufactured in Germany, this piston kit is built for high mechanical strength and efficient thermal performance in two-stroke engines. Features include an elliptical piston design for uniform surface contact under heat expansion, reducing stress and the risk of piston collapse. It promotes effective combustion heat transfer to the cylinder wall for enhanced engine reliability. Kit includes forged piston, lock CW15, pin WP032, ring set RSB5400, and rod P2019. OEM reference 4XM-11631-30-A0. Bore size 54.00mm, actual diameter 53.94mm, compression height 28.00mm, stroke 54.50mm, displacement 124 cm³, piston clearance 0.06mm.","descriptionMarkdown":"### Wossner Forged Piston Kit - Enhance Your Motorcycle's Performance\n\nThis Wossner forged piston kit is engineered for peak performance in high-revving two-stroke engines. Manufactured in Germany, it provides exceptional structural integrity and efficient thermal management. The innovative elliptical piston design ensures uniform surface contact, even under extreme heat, preventing localized stress and the risk of piston failure. This kit is meticulously optimized for effective combustion heat transfer to the cylinder wall, contributing to overall engine reliability and longevity.\n\n### Key Features:\n\n\t\n- Forged piston construction for superior mechanical strength.\n\t\n- Elliptical profile promotes consistent expansion and even load distribution.\n\t\n- Minimizes the risk of structural failure under thermal stress.\n\t\n- Facilitates efficient heat transfer from the combustion chamber.\n\t\n- Precision-engineered in Germany for optimal durability and performance.\n\n### Specifications:\n\n\t\n- Standard Bore Size: 54.00mm\n\t\n- Actual Piston Diameter: 53.94mm\n\t\n- Compression Height: 28.00mm\n\t\n- Stroke: 54.50mm\n\t\n- Displacement: 124 cm&sup3;\n\t\n- Recommended Piston Clearance: 0.06mm\n\t\n- Compression Ratio: Designed for 2-stroke applications (compatible with Wossner and OEM specifications).\n\n### Component Details:\n\n\t\n- Wossner Piston Kit Part Number: 8117DA\n\t\n- Lock Ring: CW15\n\t\n- Piston Pin: WP032\n\t\n- Replacement Ring Set: RSB5400\n\t\n- Connecting Rod Reference: P2019\n\t\n- Original Equipment Manufacturer (OEM) Reference: 4XM-11631-30-A0\n\t\n- Cross Reference Part Number: 693M05400","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"YZ 125","cc":null,"notes":null,"years":"1997"}],"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-1997-yz125-5400-wossner-8117da-yamaha-mx-4xm-11631-30-a0","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/7d382f701a92:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/7d382f701a92:1"}},"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."]}}