Re-Designed and Improved heavy duty Yamaha YFZ450 Regulator Rectifier has a higher power handling ability than the original OEM part. This regulator rectifier comes with a direct plug in connector. This unit is much more efficient than the OEM regulator rectifier because of its improve cooling fin design which allows it to dissipate heat quickly & effectively.
These are some of the several OEM numbers that this part would fit: OEM Part Number(s) 5TG-81960-00-00