{"product_id":"prox-23cbs21093-crankshaft-bearing-seal-kit-yamaha-yz80-yz85-moto-house-mx","title":"ProX Crankshaft Bearing and Seal Kit 23.CBS21093 — Yamaha YZ80 \/ YZ85 1993-2018","description":"\u003ch1\u003e\u003cstrong\u003eProX Crankshaft Bearing and Seal Kit 23.CBS21093 — Yamaha YZ80 \/ YZ85 1993-2018\u003c\/strong\u003e\u003c\/h1\u003e\n\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eProX Crankshaft Bearing and Seal Kit 23.CBS21093\u003c\/strong\u003e is designed to be the definitive solution for your bottom-end rebuild. When performing a crankshaft replacement or service, it is critical to use fresh bearings and seals to maintain proper crank alignment and prevent air leaks that can compromise your \u003cstrong\u003e2-stroke engine's performance\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eProX components are manufactured to exact \u003cstrong\u003eOEM specifications\u003c\/strong\u003e, ensuring that your engine meets factory standards for longevity and smooth operation. This comprehensive kit contains all the necessary bearings and seals for a professional-grade component replacement, making it the perfect partner for either your OEM crankshaft or a replacement ProX unit.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: ProX Crankshaft Bearing and Seal Kit\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePrecision-engineered to meet or exceed exact OEM specifications\u003c\/li\u003e\n  \u003cli\u003eIncludes all essential bearings and seals for a complete bottom-end service\u003c\/li\u003e\n  \u003cli\u003eEnsures optimal crankshaft alignment and reduces engine vibration\u003c\/li\u003e\n  \u003cli\u003eHighly durable construction designed for the rigors of off-road racing\u003c\/li\u003e\n  \u003cli\u003eFully compatible with both OEM and ProX crankshaft assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlease review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eFitment List\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; margin-top: 15px; margin-bottom: 15px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f7f7f7;\"\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eYear Range\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Brand\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Model \u0026amp; Sub-Model\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2002-2018\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYamaha\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYZ85\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e1993-2001\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYamaha\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYZ80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is it important to replace the seals along with the bearings?\u003c\/strong\u003e\u003cbr\u003e\nA: On a 2-stroke engine, crankshaft seals are vital for maintaining crankcase compression and preventing transmission oil from being sucked into the combustion chamber. Old seals often become brittle and leak, which leads to erratic idling, poor throttle response, and potential lean engine seizure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this kit with a stock OEM crankshaft?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, this kit is specifically designed to work perfectly with both OEM Yamaha crankshafts and ProX aftermarket replacement crankshafts.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e When pressing your new crankshaft bearings into the engine cases, always use an oven to warm the cases slightly (about 200°F). The aluminum cases will expand, allowing the new bearings to slip into place without needing to hammer them, which prevents case damage and ensures the bearings are seated perfectly square.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/yamaha-yz85-performance-parts-and-accessories-moto-house-mx\"\u003eYamaha YZ85 Performance Parts \u0026amp; Upgrades\u003c\/a\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/yamaha-2-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eYamaha 2-Stroke Performance Parts\u003c\/a\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003ePremium Engine Lubricants \u0026amp; Chemicals\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eAt Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMoto-House MX – Choice of Champions\u003c\/strong\u003e – Clermont \/ Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"ProX Crankshaft Bearing and Seal Kit 23.CBS21093\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"ProX\"\n  },\n  \"sku\": \"23.CBS21093\",\n  \"description\": \"OEM-specification crankshaft bearing and seal kit for Yamaha YZ80 and YZ85, essential for smooth, reliable bottom-end operation.\"\n}\n\u003c\/script\u003e","brand":"Pro-X","offers":[{"title":"Default Title","offer_id":40304549396563,"sku":"23.CBS21093","price":31.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/prox-23cbs21093-crankshaft-bearing-and-seal-kit-2002-2018-yamaha-yz85-829627.jpg?v=1735459804","url":"https:\/\/motohousemx.com\/products\/prox-23cbs21093-crankshaft-bearing-seal-kit-yamaha-yz80-yz85-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}