Starter Motor 8R9-81890-00 / B3J-81890-00 – Replacement for Yamaha WR450F / YZ450F / YZ450FX
Product Description (SEO Friendly)
This premium replacement starter motor is designed to match OEM specifications for Yamaha WR450F, YZ450F, and YZ450FX models. With durable construction, strong cranking power, and precise fitment, it provides reliable starting performance for off-road and motocross motorcycles. Ideal for replacing worn or weak OEM starters.
Replacement Part Numbers
8R9-81890-00
B3J-81890-00
(Direct aftermarket replacement for the OEM Yamaha starter motor)
Fitment Information (Complete & Organized)
✔ Yamaha WR450F
2019 WR450F – WR450FK
2020 WR450F – WR450FL
2021 WR450F – WR450FM (BDB2)
2022 WR450F – WR450FN (BDB6)
2023 WR450F – WR450FP (BDBA)
✔ Yamaha YZ450FX
2019 YZ450FX – YZ450FXK
2020 YZ450FX – YZ450FXL1
2021 YZ450FX – YZ450FXM (BEX1)
2022 YZ450FX – YZ450FXN (BEX5)
2023 YZ450FX – YZ450FXP (BEX9)
✔ Yamaha YZ450F / YZ450F Monster Edition
2020 YZ450F – YZ450FLGY
2020 YZ450F – YZ450FLL
2021 YZ450F MONSTER – YZ450FMME (B2W9 / B2W9E)
2021 YZ450F – YZ450FML (B2W5)
2022 YZ450F – YZ450FNL (B2WC)
2022 YZ450F MONSTER – YZ450FNME (B2WG)
