The old beat up 70 tooth 1 1/2" wide rear pulley that came off my 86 fxrs has a center hole which is 2 1/4" at the hub side and then is 2" on the outside,I cant find an oem# on it,does anyone know what kind of pulley this is?? I have a 136 tooth belt.The local dealership says it came stock with a oem#40221-85A pulley but all the pics of these pulleys Ive seen have a center hole which is 2" straight through with no 2 1/4" offset....Also does anyone know how to get those 5 recessed alan head bolts off the rear brake rotor? why they didnt use a hex bolt is beyond me ,Thanx for your input

 

to crack those rotor bolts loose you might need to heat the cast area that the threads go into in order to bust loose the loc tite that they used to glue them in with. best choice is a socket type Allen key so you can put some English on it.
as for your tapered sprocket, I have a feeling that it might be after market.
Hatch.

 

If you are looking for a replacement rear pulley, just buy the correct part! Unless your rear hub is in someway different to stock it will fit. As for the rotor bolts, if they were hex bolts that would just make it easier to wreck'em! As Hatch says, you need to employ the dark forces to get them out.