User Manual

Specifications for 4
1
⁄8” Bore Engines
Displacement Bore Stroke Compression Ratio
111” 4
1
⁄8” 4
1
⁄8” 9.7:1
117” 4
1
⁄8” 4
3
⁄8” 10.2:1
124” 4
1
⁄8” 4
5
⁄8” 10.8:1
Cylinder Heads Specification
Valve Guide in Head (tight) .0015” - .003”
Valve Seat in Head (tight) .005” - .0075”
Crankcase Specification Service Wear Limit
Timkin
®
Race in Case (tight) .001” - .003” less than .0025”
Pinion Race in Case (tight) .001” - .003” less than .0025”
Valves (Fit in Guide) Specification Service Wear Limit
Intake .0012” - .0015” .0025”
Exhaust .0018” - .0023” .0035”
Seat Width .040” - .062”
Stem Protrusion 2.045” - 2.060” 2.080”
Flywheels Specification Service Wear Limit
Runout (Shaft at Flywheel) .0005” - .001” .003”
End Play .001” - .005” exceeds .005”
Pinion Bearing Fitment .0004 - .001” .002”
Rocker Arms Specification Service Wear Limit
Shaft Fit in Bushing (Loose) .0007” - .0018” .0035”
Bushing Fit in Rocker
Arm (Tight)
.002” - .004”
Connecting Rods Specification Service Wear Limit
Crankpin Bearing
Running Clearance
.001” - .0012” .002”
Piston Pin Fitment in Red .0005” - .001” .002”
Connecting Rod Side-play .015 - .035” .040”
Hydraulic Lifters Specification Service Wear Limit
Lifter Fit in Guide (Loose) .0006” - .0017” .003”
Connecting Rods Specification S&S
®
Suggestions
Pinion Gear Nut 50 Ft.-Lbs Loctite
®
272
Rocker Box Hardware
1
⁄4” 120 in.-Lbs Loctite
®
243
Rocker Box Hardware
5
⁄16” 18 Ft.-Lbs Loctite
®
243
Tappet Guide Fasteners 120 in.-Lbs Loctite
®
243
Pushrod Locknuts 120 in.-Lbs
Cylinder Head Bolts See Chart on Page 9
Crankcase Fasteners
1
⁄4” 120 in.-Lbs
Crankcase Fasteners
5
⁄16” 15 Ft.-Lbs
Gearcover Fasteners 120 in.-Lbs Loctite
®
243
Intake Manifold-to-Head 16 Ft.-Lbs Loctite
®
243
Intake Manifold-to-Carb 18 Ft.-Lbs Loctite
®
243
Exhaust Flange-to-Head 60-80 in.-Lbs Anti-seize
Tappet Screen Plug 120 in.-Lbs
Timing Hole Plug 120 in.-Lbs
Spark Plug 11-18 Ft.-Lbs Anti-seize
Cylinder Studs 10 Ft.-Lbs Loctite
®
262
Pistons Specification Service Wear Limit
Fit in cylinder .002” - .0025” .005”
End Gaps: Top Two
Compression
.017” - .025” .028”
Oil Control Rails .015 - .035” .050”
Gearcase Specification Service Wear Limit
Breather Gear End-play .005” - .015”
Breather Gear Running
Clearance
.0015” - .0025” .004”
Camshaft in Bushing .0007 - .002” .003”
Camshaft End-play .005” - .015”
Pinion Shaft in Bushing .001” - .0025”
Bushing Fit in
Gearcase (Tight)
.002” - .004”
Oil Pump Shaft Clearance .0007” - .0023 .0035”
20