S&S Cycle Bore 4 1⁄8 V-Series Engines - Manual (Page 3)

Failure to observe the previous instructions may result in
engine damage not covered under warranty.
FLYWHEELS
Confirm pinion shaft main bearing fit. Correct size bearing is
supplied with engine, but must be verified by engine builder.
Flywheel assembly can then be prepared for installation.
NOTES
●
Refer to information tag on crankcases for final honed size
of pinion shaft main bearing race.
● S&S ® pinion shaft main bearing fitting charts #1 and #2 use
Harley-Davidson ® bearing color codes.
● All measurements must be taken with parts at room
temperature, approximately 70° F.
1. Fitment Method A - Use Chart 1.
a. Refer to information tag on crankcases to determine
final honed size of inside diameter of pinion shaft main
bearing race.
b. Measure pinion shaft bearing surface diameter.
c. Cross reference pinion race inside diameter with pinion
shaft bearing surface outside diameter to determine
correct color code.
EXAMPLE - Pinion shaft bearing surface diameter measures
1.2499” and is between 1.2498” and 1.2500” in left “Pinion Shaft
Bearing Diameter” column. Pinion bearing race inside diameter
is 1.7510” and falls between 1.7509” and 1.7511” in middle
“Bearing Race Diameter” column. Correct bearing color code
where two columns intersect is “BLUE”. Selecting color where
columns intersect provides proper fit for normal service. If looser
fit is desired, select bearing color directly to right of color
indicated from selection process. If color indicated from selection
process is located in right color column, go to next row directly
below and select color in left color column.
2. Fitment Method B - Use Chart 2.
a. Refer to information tag on crankcases to determine
final honed size of inside diameter of pinion shaft main
bearing race.
b. Measure pinion shaft bearing surface diameter.
c. Subtract pinion shaft bearing surface diameter from
pinion bearing race inside diameter.
d. Select range in left “Bearing Race Diameter minus
Pinion Shaft Bearing Diameter” column where
difference best splits high and low parameters of range.
Corresponding color bearing set in right “Bearing Color
Code” column provides proper fit for regular service.
EXAMPLE - Pinion bearing race inside diameter is 1.7510”. Pinion
shaft bearing surface diameter is 1.2499”. 1.7510” minus 1.2499”
is .5011”. Difference of .5011” splits .5009” to .5013” range in
third row exactly. Corresponding “BLUE” color code in right
column should be used. Notice that .5011” fits in several range
groups. Try to select group where difference falls closest to
middle of range. If you are not sure, select color that corresponds
with group closer to top of chart. This will provide slightly looser
bearing fit and help prevent bearing seizure. Selecting next color
up on chart may also be done if looser fit is desired for
competition applications.
CRANKCASES
NOTE - S&S crankcases are sold in matched sets only. Individual
case halves are not available.
1. Disassemble crankcases & wash in hot, soapy water. Rinse
case halves and blow dry with compressed air. Check all
internal passages. Coat bearing surfaces with a light oil to
prevent rust.
2. Install piston oilers - right-side crankcase.
a. Lubricate O-ring with engine oil and install in
piston oiler.
b. Apply Loctite ® 243 to screws. Install oilers, tighten screws
to 25 in-lbs. See Picture 1.
INSTALL FLYWHEELS IN CRANKCASE
1. Thoroughly clean parts according to instructions previously
mentioned. Apply coat of assembly lube to bearing surface
of sprocket shaft and inner race of Timken
® bearing. Install
bearing on shaft with appropriate tool. See Picture 2.
NOTE - S&S does not recommend using a press to install sprocket
shaft bearings, as this can push flywheels out of true. Correct
bearing installation tools are available from Harley-Davidson
®
and other sources.
3
Picture 1 Picture 2
CAUTION