In my quest to upgrade to the 1 1/2" Roadstar pulley i discovered that the hubs are the same machined castings.
Only difference is the colors.
The heavier/thicker washer used on the Roadstar is to accommodate the longer stud projection present because of the deeper machined pulley that is required to offset the wider belt on the rear wheel and also for the accessory CHROME PULLEY NUT COVERS that would bottom out because of the longer
exposed studs. (THE ASSEMBLED STUDS ARE IDENTICAL FOR BOTH HUBS)
1999-2003 Roadstar
COLLAR, WHEEL 4WM-25377-00-00 1 $12.86
CIRCLIP 99009-52500-00 1 $3.72
BEARING 93306-20551-00 1 $13.98
COLLAR, WHEEL 4WM-25376-00-00 1 $12.86
CLUTCH, HUB 4WM-25366-00-00 1 $105.08 ** BRUSHED ALUMINUM
DAMPER 4WM-25364-00-00 6 $5.36
BEARING,CYLINDRICA 93317-32677-00 1 $30.19
CIRCLIP,INNER 93450-35015-00 1 $3.76
OIL SEAL,DD-TYPE 93106-30004-00 1 $4.34
COLLAR(3BC) 90387-202X9-00 2 $9.79
WASHER,PLATE (55X) 90201-120E8-00 5 $3.31 ** 1/8" Thk approx
BOLT, STUD 95617-12630-00 5 $2.66
NUT, U 95614-12100-00 5 $1.48
2004 Warrior
COLLAR, WHEEL 4WM-25377-00-00 1 $12.86
CIRCLIP 99009-52500-00 1 $3.72
BEARING 93306-20551-00 1 $13.98
COLLAR, WHEEL 4WM-25376-00-00 1 $12.86
CLUTCH, HUB 5PX-25366-00-00 1 $126.62 ** BLACK POWDER COATED
DAMPER 4WM-25364-00-00 6 $5.36
BEARING,CYLINDRICA 93317-32677-00 1 $30.19
CIRCLIP,INNER 93450-35015-00 1 $3.76
OIL SEAL,DD-TYPE 93106-30004-00 1 $4.34
COLLAR(3BC) 90387-202X9-00 2 $9.79
WASHER,PLATE 90201-126A7-00 5 $1.31** 1/16" Thk approx
BOLT, STUD 95617-12630-00 5 $2.66
NUT, U 95614-12100-00 5 $1.48
Roadstar Hub w/Cast No.:

Roadstar Pulley & Hub Silver (Note Thicker Washer bottom hub - Warrior Hub Black:

Roadstar & Warrior Hub respectively with same Cast No.: