S&S SH Series - Specifications and Wear Limits

SPECIFICATIONS AND WEAR LIMITS
KNSERIES ENGINES
Description Specication Wear Limit
Rocker Arm
Shaft in bushing .0007"–.0018" .00415"
Bushing t in rocker arm (tight) .0015"–.00275" < .002075"
Rocker arm endplay .004"–.017"
Cylinder Head
Valve to guide t intake .0017"–.0025" .0035"
Valve to guide t exhaust .0025"–.0035" .0050"
Valve guide in head (tight) .0015"–.0030" <.0015"
Valve seat in head (tight) .0030"–.0045" <.0030"
Seat width intake .031" .041"
Seat width exhaust .047" .057"
Valve stem protrusion (intake) 1.690"–1.715" 1.735"
Valve stem protrusion (exhaust) 1.706"–1.721" 1.741"
Pistons
Fit in cylinder (forged) .0035"–.004" .0055"
Compression ring gap 3
7
⁄16" .014" – .022" .030"
Compression ring gap 3
5
⁄8" .017"–.026" .030"
Oil ring gap .015"–.035" .050"
Description Specication Wear Limit
Connecting Rods
Side play .006"–.036" .040"
Wristpin in rod .0005"–.001" .002"
Crankpin running clearance .001"–.0012" .002"
Flywheels
Run out at bearing .0005"–.001" .006"
Timken endplay .001"–.005" .005"
Pinion bearing t .0004"–.001" .002"
Cam Chest
Breather gear endplay .005"–.015" .016"
Breather clearance .0015"–.003" .004"
Camshaft in bushing .0007"–.002" .003"
Camshaft endplay .005"–.015" .016"
Pinion shaft in bushing .001"–.0025" .0035"
Bushing t in gear cover
(tight)
.0007"–.0023" <.0006"
Oil pump shaft .0005"–.0025" .0035"
Lifters
Lifter t in guide .0006"–.0017" .0022"
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