Redesigned and Improved Yamaha YZ450F YZ 450F output 4-Pole 35W Lighting Stator Coil. This unit has a higher output capacity than the OEM unit, and will not have the problems that you have experienced with your OEM version. Plug in replacement stator on plate.
These are some of the several OEM numbers that this part would fit:OEM Part Number(s) 2S2-85560-00-00
These stators are manufacturered as soon as an order is placed. From the time the order is placed, your new stator will be shipped a week This period is much shorter than the 3 plus month Yamaha delay on this part. If you want the non lighting version see part number # C387