{"product_id":"moose-offroad-24-1123-crankshaft-main-bearing-kit-beta-rr-rs-rx-x-pro-350-500-4t","title":"Moose Offroad 24-1123 Crankshaft Main Bearing Kit — Beta RR RS RX X-Pro 350-500 4T","description":"\u003cp\u003e\u003cb\u003eMoose Offroad 24-1123 — Precision Crankshaft Main Bearings and High-RPM Reliability for Beta 4-Stroke Engines\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eEnsure the heart of your engine remains stable and vibration-free with the Moose Offroad 24-1123 Crankshaft Bearing Kit. Specifically engineered for the high-performance Beta 4-stroke lineup—including the RR, Race Edition, and the new X-Pro series—this kit provides the critical foundation for your engine's rotating assembly. The crankshaft bearings are the highest-stress components in your bottom end, responsible for supporting the crank at extreme RPMs while maintaining perfect alignment. When these bearings begin to wear, they can cause destructive vibration, power loss, and eventually catastrophic engine failure.\u003c\/p\u003e\n\u003cp\u003eMoose Offroad utilizes precision-manufactured bearings designed to meet or exceed OEM specifications for load capacity and heat dissipation. This kit contains both the right and left crankshaft main bearings, ensuring a matched set for a complete bottom-end rebuild. For these 4-stroke applications, the bearings are designed to be lubricated by the engine's internal oiling system, providing a low-friction interface that stands up to the rigors of competitive motocross and technical enduro riding. Whether you are refreshing a high-hour Beta 390 RR or building a race-ready 450 RX, the 24-1123 kit delivers the structural integrity required for modern four-stroke power.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePrecision Engineered:\u003c\/b\u003e Manufactured to exacting tolerances to ensure perfect crankshaft alignment and minimal parasitic drag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComplete Main Set:\u003c\/b\u003e Includes both the left and right side crankshaft main bearings for a comprehensive bottom-end service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh-RPM Durability:\u003c\/b\u003e Specifically rated for the high heat and rapid acceleration cycles of Beta’s 350cc to 500cc 4-stroke engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOE Fitment:\u003c\/b\u003e Designed as a direct replacement for factory hardware, compatible with Beta RR, RS, RX, and X-Pro models from 2011 to 2025.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBottom-End Stability:\u003c\/b\u003e Reduces engine vibration and extends the life of your connecting rod and transmission components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eMoto-House MX Pro Tip:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA crankshaft bearing replacement is a significant \"split-case\" job that requires precision and the right tools. When installing the Moose 24-1123 kit, we highly recommend the \"heat-and-freeze\" method: gently heat the engine cases and freeze the bearings to allow them to drop into place without excessive force, which protects the bearing races from damage. Since this is a 4-stroke kit, please note that external oil seals are not included as the bearings are oil-bathed. Always pair a new set of crank bearings with a complete engine gasket set and a fresh oil pump inspection to ensure your Beta's bottom end remains bulletproof for the next 100 hours of riding.\u003c\/p\u003e\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;\"\u003eTechnical Specification\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eDetails\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;\"\u003eApplication\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eCrankshaft Main Bearings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eEngine Type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003e4-Stroke (350cc - 500cc)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eKit Contents\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eRight \u0026amp; Left Bearings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eNote\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eDoes not include seals (4-Stroke application)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFAQ Questions\u003c\/h3\u003e\n\u003cp\u003eQ) \u003cb\u003eDoes this kit include the crankshaft seals?\u003c\/b\u003e\u003cbr\u003eA) No. As noted for 4-stroke applications, this kit contains the precision bearings only. 4-stroke crank seals are typically part of a complete engine oil seal kit.\u003c\/p\u003e\n\u003cp\u003eQ) \u003cb\u003eWill this work for the 2025 Beta 450 RX?\u003c\/b\u003e\u003cbr\u003eA) Yes, this kit is verified for the latest Beta 4-stroke motocross and off-road models, including the 450 RX and X-Pro series.\u003c\/p\u003e\n\u003cdiv class=\"silo-links\"\u003e\n\u003ca href=\"\/search?q=Beta+Full+Gasket+Set\"\u003eBeta Complete Gasket Sets\u003c\/a\u003e | \u003ca href=\"\/search?q=Beta+Oil+Filters\"\u003eBeta Oil Filters \u0026amp; Maintenance\u003c\/a\u003e | \u003ca href=\"\/search?q=Moose+Offroad+Engine\"\u003eShop All Moose Engine Parts\u003c\/a\u003e\n\u003c\/div\u003e\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\u003cp\u003e \u003c\/p\u003e","brand":"MOOSE OFFROAD","offers":[{"title":"Default Title","offer_id":44495825076307,"sku":"24-1123","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/2573605.png?v=1776227302","url":"https:\/\/motohousemx.com\/products\/moose-offroad-24-1123-crankshaft-main-bearing-kit-beta-rr-rs-rx-x-pro-350-500-4t","provider":"Moto-House MX","version":"1.0","type":"link"}