S&S Cycle Pinion Shafts for Big Twin - Manual (Page 5)

B. 1987 to 1993 big twin bearings
1. 1954 to early 1981 stock flywheels or S&S ® SE or
L style flywheels and S&S pinion shaft 33-2024.
No thrust washers are normally used. Typical
bearing arrangement - bearings against
flywheel and snap ring. See Figure 4.
2. 1981 to 1986 big twin flywheels and S&S pinion
shaft 33-2027—extra .070" main bearing thrust
washer supplied in kit is normally used. Typical
washer and bearing arrangement - .070"
washer against flywheel, bearings, and snap
ring. See Figure 5.
3. 1987 to 1989 big twin or S&S SL or BL style
flywheels for 1981 and later, and S&S pinion
shaft 33-2027 - No thrust washers are normally
used. Typical arrangement - bearings against
flywheel, and snap ring directly against
bearing. See Figure 6.
C. 1994 and later single roller style bearings
NOTE: Late style larger diameter bearing retaining clip S&S
PN 31-4021 or Harley-Davidson
® H-D 11177A must be used
with late style 1994 and later single roller pinion bearings.
Earlier style smaller diameter retaining clip may not
sufficiently contact late style bearing cage to safely hold
bearing cage in place. Refer to Harley-Davidson
® Service
Bulletin M-1042, 4-19-94. S&S recommends that late style
retaining clip be used with all types of pinion bearings.
Use of earlier style retaining clip with late style single
roller bearing may result in bearing failure and serious
engine damage.
Figure 4
.070"
Thrust
Washer
Figure 5
Figure 6
CAUTION
5