S&S Cycle Dual Valve Spring Kits for 1984–12 Harley-Davidson Big Twin and 1986–12 Sportster Models - Manual (Page 3)

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When installing the S&S® spring kits on 7mm valve stems in 2005 and later big twin and 2004 and later Sportster® models please refer
to Figure B below. For both the .585" and the .650" spring kits, the keepers must be located in the groove closest to the tip of the valve.
Any other groove will yield the incorrect installed height and may cause premature valve train failure. S&S is not responsible for incorrect
installation.
E- Repeat Steps A-D for remaining valves and record all measurements. Be sure to keep track of all parts during assembly to assure they are
installed in same location and with same valves clearances were measured with.
4- Adjust installed spring height for all valves to 1.800" ± .010". If spring height is too high, place shims under lower collar to achieve correct spring
height. Shims are available from S&S® and local sources such as automotive parts houses. If spring height is too low, grind valve or valve seat,
or machine bottom of valve spring pocket to achieve correct spring height. Special valve spring pocket cutting tools are available from various
tool manufacturers.
NOTE: Installed spring height is height when valve and spring are installed and in closed position. Correct installed spring height is 1.800" ± .010".
•
Installing springs at height less than recommended dimension will cause rapid spring fatigue resulting in possible engine damage.
Engine should be frequently disassembled for spring tension measurement.
•
Installing springs at height above recommended dimension will decrease spring tension resulting in possible valve float and engine
damage.
•
Failure to establish required clearances may cause valve seal failure and other, more extensive engine damage not covered under
warranty.
Valve spring assembly is under considerable tension when compressed and is potentially dangerous. Wear eye protection and take due
caution when checking for coil bind and during installation. After assembly, carefully strike tip of valve stem with plastic hammer to
insure that keepers are seated. Direct spring assembly away from face and body during this procedure.
5- Install valves and valve springs in heads. Be sure valve guide seals are in place. Install top collar and keepers. For 2005-up Harley-Davidson® big
twin and 2004-up Sportster models with 7mm valve stems, see Figure B above.
NOTE: Installed height should be the same for each spring assembly.
6- Confirm that rocker arm does not contact top collar. This is most likely to occur when valve is fully closed. Clearance should be at least .040".
7- Confirm rocker arm to rocker cover clearance.
A- Install pushrods and rocker assemblies. Adjust pushrods per manufacturer’s instructions.
B- Place thin deposit of clay or putty on inside of top rocker cover directly above pushrod and valve spring areas.
C- Install top cover and rotate flywheels two complete revolutions (720°).
CAUTION
CAUTION
WARNING
Figure B