Caution – S&S Cycle Bore 4 1⁄8 V-Series Engines User Manual

Page 10

4. Insert pushrod tube O-ring washers in lifter blocks. See

Picture 23.

5. Install O-rings in lifter blocks
6.

Install thick pushrod tube O-rings in cylinder heads.

Determine pushrod placement by comparing lengths of each
pushrod (not including adjuster). Longest pushrod is for
front exhaust, next longest for rear exhaust, shortest for rear
intake, remaining pushrod for front intake. See Picture 24.

8. Screw pushrod/lifter adjusters in to shortest length. Set

pushrods aside.

INSTALL ROCKER COVERS

All parts must be clean and dry. To install, place lower rocker
cover gaskets on cylinder head. A small amount of Hylomar

or other thin gasket sealant may be used in corners to hold
gasket in place on head. No other sealant should be used.

2. Place lower rocker cover on gasket and cylinder head. Install

two of the 5⁄16-18 x 1” screws in front and rear left
(driveside) holes of rocker housing. Tighten screws two turns
to hold rocker housing and gasket in place.

3. Install four remaining rocker housing screws. Gradually

tighten six screws to 18 ft-lbs. Using sequence illustrated in
Figure 2.

4. Measure clearance between rocker housing and valve

spring. See Picture 25. Minimum is .025”. If necessary,
loosen screws and reposition housing to increase clearance,
then retighten screws.

5. Place O-ring in center of rocker housing.
6. Repeat above procedure for other cylinder head.

Operating engine without sufficient clearance between valve
spring and rocker cover will cause engine damage not
covered under warranty.

ROCKER ARM / PUSHROD INSTALLATION AND ADJUSTMENT

NOTE - S&S

pushrods are designed with emphasis on strength.

Weaker pushrods may flex under load, resulting in loss of power
increased cranking compression, and detonation.

1. Rotate flywheels in direction of normal engine rotation until

both lifters for front cylinder at lowest position on camshaft.
Front piston will be at or near TDC on compression stroke
when lifters are in correct position.

2. Identify pushrods as explained in previous section. Hold

pushrod tube for front intake in place and pass correct
pushrod, adjuster end down, through cylinder head and
pushrod tube. Repeat for front exhaust.

NOTE - Some engine builders prefer to install and adjust pushrods
one at a time, beginning with intake.

3. Lubricate rocker shafts with assembly lube. Place rocker arms

in support, and slide shafts through support and rocker arm.
Reliefs in shafts must face the center of the cylinder and
align with the right (cam-side) bolt holes. See Picture 26.

Picture 23

Picture 24

Picture 25

Figure 2

CAUTION

Driveside

Camside

ont