S&S Cycle Pinion Shafts for Big Twin User Manual

Page 4

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Bearings from 1994-’99 consist of one stamped
steel cage with a single seat of rollers installed.
See Picture 5.

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The combinations of thrust washers and bearings
shown in this instruction sheet are typical for most
installations. Individual circumstances may, however,
require that engine builder space bearings in a
different manner. Engine builder must insure that
bearing assembly rotates freely on pinion shaft and
that rollers are positioned so they are entirely
supported by the bearing race.

●

There is no specification for pinion bearing assembly
end play. A good rule of thumb is that if an additional
thrust washer can be installed and bearings can still
rotate freely, and are still supported by race, install it.
If not, leave it out.

A. 1954-1986 bearings

1954 to early 1981 flywheels or S&S

SE or L

style flywheels, and S&S pinion shaft 33-2024 -
Two .070" thrust washers are normally used.
Typical washer and bearing arrangement -
.070" washer against flywheel, bearings, .070"
washer, and snap ring. See Figure 1.

1981- 1986 stock flywheels and S&S pinion
shaft 33-2027 - two .070" thrust washers and
one .050" thrust washers are normally used.
Typical washer and bearing arrangement -
.070" washer against flywheel, bearings, .070"
washer, .070" or .050" washer, and snap ring.
See Figure 2.

1987 to 1989 big twin flywheels or S&S SL or
BL flywheels for 1981 and later, and S&S
pinion shaft 33-2027—one .070" thrust
washer and one .050" thrust washer are
normally used. Typical washer and bearing
arrangement— .050" washer against
flywheel, bearings, .070" washer, and snap
ring. See Figure 3.

NOTE : It may be necessary to install bearing cages so that
open side faces flywheel in order to position rollers entirely
on the bearing race.

.070"
Thrust
Washer

#33-2024 pinion shaft
1954 - 1981 style flywheel
1958 - 1986 style bearings

.070"
Thrust
Washer

Figure 1

.050"
Thrust
Washer

.070"
Thrust
Washer

Figure 3

.050"
Thrust
Washer

.070"
Thrust
Washer

Figure 2

Picture 5