{"product_id":"hot-rods-4036-crankshaft-assembly-yamaha-yz125-moto-house-mx","title":"Hot Rods Crankshaft Assembly 4036 — Yamaha YZ125 2001-2004","description":"\u003ch1\u003e\u003cstrong\u003eHot Rods Crankshaft Assembly 4036 — Yamaha YZ125 2001-2004\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eBring your 2001-2004 Yamaha YZ125 back to peak performance with the \u003cstrong\u003eHot Rods 4036 Crankshaft Assembly\u003c\/strong\u003e. Designed as a direct, high-quality replacement for your engine's bottom end, this assembly arrives fully pre-assembled and factory-trued to exact OEM specifications, saving you significant time and labor during your rebuild.\u003c\/p\u003e\n\u003cp\u003eForged from high-grade \u003cstrong\u003e4140 steel\u003c\/strong\u003e, this crankshaft is engineered to meet or exceed the performance and durability of factory components. It comes complete with proven Hot Rods connecting rods and top-end bearings, and features precision-machined gears rated at DIN class 9 or higher. For long-term serviceability, the unit is completely rebuildable using genuine Hot Rods parts, ensuring your YZ125 stays race-ready for seasons to come.\u003c\/p\u003e\n\u003ch3\u003eTop Features: Hot Rods Crankshaft Assembly\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSold complete with proven Hot Rods connecting rods and top-end bearings\u003c\/li\u003e\n\u003cli\u003eFactory assembled and trued to meet or exceed OEM performance specifications\u003c\/li\u003e\n\u003cli\u003eManufactured from durable 4140 steel for extreme 2-stroke reliability\u003c\/li\u003e\n\u003cli\u003eGears precision-machined to DIN class 9 quality level or higher\u003c\/li\u003e\n\u003cli\u003eComplete, pre-balanced, and ready for immediate installation\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\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;\"\u003e2001-2004\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;\"\u003eYZ125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this crankshaft come with all necessary bearings?\u003c\/strong\u003e\u003cbr\u003eA: This assembly includes the connecting rod and top-end bearings. We always recommend purchasing a new set of main bearings and seals separately to complete your bottom-end service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this crankshaft assembly a drop-in part?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Because it is factory-trued, this assembly is ready to be installed directly into your engine cases without any further machine work required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e When installing the crankshaft into your cases, check the crankshaft end play. On these YZ125 models, excessive end play can lead to premature seal wear, so ensure your thrust washers are in good condition and installed correctly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003eo \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\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/yamaha-yz125-performance-upgrades-engine-mods-and-accessories-moto-house-mx\"\u003eYamaha YZ125 Performance Parts \u0026amp; Upgrades\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003eAssembly Lube, Crank Seals, \u0026amp; Chemicals\u003c\/a\u003e\u003c\/p\u003e\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\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\u003cp\u003e \u003c\/p\u003e","brand":"Hot Rods","offers":[{"title":"Default Title","offer_id":40562247598163,"sku":"4036","price":402.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/hot-rods-oem-replacement-crankshaft-4036-2001-2004-yamaha-yz125-812078.jpg?v=1735344471","url":"https:\/\/motohousemx.com\/products\/hot-rods-4036-crankshaft-assembly-yamaha-yz125-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}