S&S Cycle 650 Sidewinder Valve Spring Kits for X-Wedge Engines - Manual (Page 2)

Fig. 1
Picture 1: .585" and .650" Sidewinder Valve Springs
Fig. 2
Dimension A: Installed spring height must be adjusted to dimension in
step 4.
Dimension B: Must be .060" greather than lift valve for camshaft to be
used.
Front
Exhaust
Front
Intake
Rear
Intake
Rear
Intake
Dimension A
Dimension B
2
WARNING
The safety of the motorcycle rider is dependent of proper
installation of this product. If you are not certain of your
capabilities or do not have the correct tools for this installation,
please consult a shop to have it done. Improper installtion of this
product could result in injury or death to the rider.
S&S® valve spring and collar kits 106-0772 and 900-0212 are intended
for S&S X-Wedge® engines with standard length, 5/16" stem diameter
valves. Spring kit 106-0772 contains springs and components that
are original equipment on production engines. Spring kit 900-0212 is
a high performance spring kit installed on S&S CNC ported X-Wedge
heads.
CAUTION
Do not mix springs, collars or any other components between
S&S Sidewinder spring kits and other S&S spring kits. Extensive
engine damage can result and is not covered under warranty.
The .650" Sidewinder valve spring is approximately 2.65" long and
1.50" in diameter at the large end. The .585" Sidewinder valve spring
is approximately 2.20" long and 1.23" in diameter at the large end. See
Picture 1 above.
Cylinder Head Preparation
Installation of PN 900-0212 (.650") spring kit may require minor
modifications to some heads. See Fig. 1, below. The upper corner of
the spring pocket may need to be chamfered to allow for additional
clearance between the spring and the head. To determine if
modifications are necessary, measure the spring pocket diameter. If
this measurement is 1.500", the upper corner of the spring pocket will
need to be chamfered with a die grinder or file. This chamfer allows
for additional clearance when the spring is compressed. If the pocket
measurement is 1.515", modifications are not required. Thoroughly
clean the head when modifications are complete. Do not attempt to
modify the spring in any way to gain additional clearance.
Note: This modification is not necessary with the .585" Sidewinder springs.
1. Remove heads from engine and disassemble. If cylinder heads/
valves are to be reconditioned, proceed at this time according to
standard procedure.
2. Determine if the upper corners of the spring pocket may need
to be chamfered to accept the .650" Sidewinder springs (see
information at the beginning and Fig. 1, above).
Spring Installed Height Measurement And Installation
1. Using the following procedure, determine installed spring height
and clearance between top collar and valve guide.
A. Lubricate the valve stem and install valve in guide
B. Install the integral bottom collar/seal.
C. Place the secondary bottom collar on top of the integral seal.
Note: Only the .650 Sidewinder spring utilizes a secondary bottom collar.
This collar centers the valve spring in the spring pocket.
D. Install the top collar and keepers. Pull the top collar tightly
against the keepers to seat the keepers in the collar.
E. While holding the valve firmly against the seat in the closed
position, measure the installed spring height (distance
between lower valve spring seating surface and outside
step of top collar). See Figure 2, Dimension A. Record this
measurement in the table below.