{"product_id":"athena-s410485320002-high-performance-crankshaft-2002-2018-yamaha-yz85-85cc","title":"Athena S410485320002 High-Performance Crankshaft — 2002-2018 Yamaha YZ85 85cc","description":"\u003cp\u003e\u003cb\u003eAthena — CNC Precision Engineering, Superior Steel Durability, and Factory-Spec Reliability\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe crankshaft is the foundation of your engine's power, and for the high-revving Yamaha YZ85, only the highest manufacturing tolerances will do. The Athena S410485320002 Crankshaft is a premium replacement designed to restore and enhance the performance of your 85cc 2-stroke. Crafted using specialized high-grade steel and machined with state-of-the-art CNC technology, this crankshaft ensures perfect balance and structural integrity for competitive motocross use.\u003c\/p\u003e\n\n\u003cp\u003eThis unit features the standard 47.80 mm stroke, making it a drop-in replacement that maintains your engine’s original displacement and timing characteristics while offering the durability of modern materials. Whether you are performing a full bottom-end overhaul or replacing a failed OEM unit, Athena’s precision engineering minimizes vibration and maximizes energy transfer, giving your mini-racer the reliability needed to stay at the front of the pack.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eManufactured from specialized high-tensile steel for maximum resistance to mechanical stress.\u003c\/li\u003e\n  \u003cli\u003eCNC high-precision machining ensures exact tolerances and superior rotational balance.\u003c\/li\u003e\n  \u003cli\u003eStandard 47.80 mm stroke length maintains factory-spec engine geometry.\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically for the 2002-2018 Yamaha YZ85 85cc 2-stroke engine.\u003c\/li\u003e\n  \u003cli\u003eOffers exceptional durability for high-RPM off-road and motocross riding styles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eMoto-House MX Pro Tip:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eWhen replacing a crankshaft, the job isn't finished until you address the supporting components. We highly recommend installing new main bearings and high-quality crank seals along with this Athena unit to prevent air leaks and ensure a smooth spin. Before closing the cases, verify that the crank is centered and that there is no debris in the lubrication ports. A properly installed crankshaft is the difference between a podium finish and a \"DNF.\"\u003c\/p\u003e\n\n\u003ctable style=\"width:100%; border-collapse: collapse;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f2f2f2;\"\u003e\n      \u003cth style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eYear\u003c\/th\u003e\n      \u003cth style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eMake\u003c\/th\u003e\n      \u003cth style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eModel Fitment\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003e2002-2018\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eYamaha\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eYZ85 \/ YZ85LW (Large Wheel)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFAQ Questions\u003c\/h3\u003e\n\u003cp\u003eQ) \u003cb\u003eDoes this crankshaft come pre-assembled with the connecting rod?\u003c\/b\u003e\u003cbr\u003e\nA) Yes, this is a complete, ready-to-install crankshaft assembly including the connecting rod and lower bearing.\u003c\/p\u003e\n\n\u003cp\u003eQ) \u003cb\u003eIs this a \"Stroker\" crank or standard size?\u003c\/b\u003e\u003cbr\u003e\nA) This is a standard stroke (47.80 mm) crankshaft, designed to meet the original factory specifications for the 2002-2018 YZ85.\u003c\/p\u003e\n\n\u003cdiv class=\"silo-links\"\u003e\n  \u003ca href=\"\/search?q=Yamaha+YZ85+Engine+Parts\"\u003eYamaha YZ85 Engine Components\u003c\/a\u003e | \n  \u003ca href=\"\/search?q=YZ85+Main+Bearings\"\u003eYZ85 Crank Bearings \u0026amp; Seals\u003c\/a\u003e | \n  \u003ca href=\"\/search?q=Athena+Performance+Parts\"\u003eShop Athena Racing Products\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"text-align: center;\"\u003e\u003cb\u003eMoto-House MX – Choice of Champions\u003c\/b\u003e – is located in Clermont\/Montverde, FL. We are the best motocross shop in Central Florida with lightning-fast shipping.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Athena S410485320002 Crankshaft Yamaha YZ85\",\n  \"image\": [],\n  \"description\": \"Premium CNC-machined steel crankshaft for 2002-2018 Yamaha YZ85. Standard 47.80mm stroke. Factory Quality replacement for high-performance 2-stroke engines.\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"ATHENA\"\n  },\n  \"sku\": \"S410485320002\",\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"priceCurrency\": \"USD\"\n  }\n}\n\u003c\/script\u003e","brand":"ATHENA","offers":[{"title":"Default Title","offer_id":44495829827667,"sku":"S410485320002","price":154.76,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/73077.png?v=1776228008","url":"https:\/\/motohousemx.com\/products\/athena-s410485320002-high-performance-crankshaft-2002-2018-yamaha-yz85-85cc","provider":"Moto-House MX","version":"1.0","type":"link"}