S&S Cycle Gear Drive Cams for Harley-Davidson Twin Cam 88 Engines - Manual (Page 3)

A. Disconnect battery ground cable to eliminate potential
sparks and inadvertent engagement of starter while
working on motorcycle.
B. Remove spark plugs and pushrod cover clips. Collapse
pushrod covers to expose pushrods.
C. Safely elevate and stabilize rear of motorcycle. Place
transmission in high gear. Turn rear wheel to rotate
engine until both lifters and pushrods for either cylinder
are at lowest point on camshaft (TDC of compression
stroke). Both intake and exhaust pushrods for that
cylinder will not be under pressure from the valve
springs and will rotate with light finger pressure.
NOTE: 510G camshafts may use stock style non-adjustable
pushrods instead of adjustable pushrods. If installing non-
adjustable pushrods, disassemble and assemble rocker box per
Harley-Davidson instructions. All other S&S gear drive cams
require installing adjustable pushrods. As a time-saving
measure, the stock pushrods can be removed with bolt cutters.
Be sure to heed cautions and warnings in these instructions.
D. Cut pushrods for cylinder that is at TDC with bolt cutter
and remove pushrods and pushrod covers from engine.
Rotate engine to place pushrods for other cylinder at
their lowest point. Cut and remove remaining pushrods.
Cutting pushrods with a saw or cutoff wheel may result in
debris entering engine, causing extensive engine damage not
covered under warranty.
Cutting pushrods without releasing spring pressure, by
rotating engine until tappets are at lowest point of travel, can
result in bodily injury.
E. Remove pushrod and lifter covers from crankcase.
F. Remove engine cam cover and gasket. It is not necessary
to remove ignition sensor from cover. Secure lifters with
a tool made from a large binder clip. See Picture 1.
G. Remove bolts and washers from cam drive sprocket and
crankshaft sprocket.
NOTE: S&S recommends using Harley-Davidson sprocket
locking tool H-D #42314 to secure sprockets while bolts are
being removed. See Picture 2.
H. Use Harley-Davidson ® cam chain tensioner unloader
H-D ® #42313 to move tensioner away from primary
cam chain. Secure tensioner with retention pin. See
Picture 3.
3
Picture 3
Picture 1 Picture 2
Picture 4
WARNING
CAUTION
All references to Harley-Davidson® part numbers is for identification purposes only. We in no way are implying that any of S&S ® Cycle’s
products are original equipment parts or that they are equivalent to the corresponding Harley-Davidson ® part number shown.