[alanh]

@Turd_fergusson ... That's a Baron 31T Road* steel pulley (fits 1-1/2" wide belt) and should be magnetic. The missing fastener is M5x12 DIN 12.9 flat head screw and use some thread lock when replaced

• The telltale are the 6-M5 screws and lightning holes (ADDED) and 6-tapped holes

 

[alanh]

@Turd_fergusson ... I know, FOR SURE, that the Yamaha version uses a M5x12 DIN 12.9 flat head screw so you'll want to check that the Baron is metric

 

[alanh]

wooo hoooo! Thought this lil thing had some pep and I swear my speedo was about 5-7 MPH over. Yeah they machined flange definitely did not look stock to me.

FYI only, the Warrior Speed Sensor Indicates off the Transmission output shaft teeth and as a result any and all changes made down stream to the Front/Rear pulleys and the rear tire size will not indicate on the Speedo.
You'll need to use a GPS

The empty hole is the trani ouput shaft to the secondary drive that connects to the middleshaft.