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Fits Make/Model/Year: Fit for Yamaha YZ450F 2018-2022 Fit for Yamaha YZ450F Monster Energy 2022 Fit for Yamaha YZ450FX 2019-2023 Fit for Yamaha WR450F 2019-2023 ATTENTION: One of the most common reasons a stator breaks down is due to a broken regulator, which burns the stator in no time. Therefore we highly recommend you to switch both parts. Technically modified stators are excluded from exchange. This regulator is not suitable for lithium-ion batteries! The battery or other electric parts can be damaged! Always use a sealant to mount the cable gland joint. Specifications: Stator Number of plugs: 2 Number of wires: 4 Number of pins: 2 + 2 Number of poles: 12 Number of mounting hole: 3 Pick up pulsar coil included. Regulator Number of plugs: 2 Number of wires: 4 Number of pins: 2 + 2 Please compare the number of pins and plugs with the old part before purchasing. Replacement Part Number: Stator Assy: BR9-81410-00, BR9-81410-01 Rectifier, regulator: B7B-81960-00 Gasket, generator cover: BR9-15451-00 Note: Before installing your new stator regulator rectifier; Check the AC output of the stator. Replace any burned or corroded connectors on stator and regulator/rectifier. Check and repair any melted wiring. Use hi-temp dielectric grease on all connectors. Our stator / regulator may use a different wire color code than your original. All of the wires are installed in the correct order; please do not change any of the wiring configurations. This stator is designed as a direct plug-in replacement and should be used as such. When bolting stator in, always use locking compound. If our stator includes a pickup coil, always make sure the air gap is correct upon installation.