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PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

S&S Cycle logo

Vintage Engines

vintage-engines.png

Additional Features and Benefits

  • Hydraulic valve train with roller rocker arms (SH-Series and P-Series)
  • Warranty varies from one to two years
  • Prices Starting at $6,895.00

Options

  • SH-Series – 1966-1999 chassis*. Alternator, Generator and Alt/Gen styles available
  • P-Series – 1948-1999 chassis*. Alternator, Generator and Alt/Gen styles available
  • KN-Series – 1936-1999 chassis. Alternator, Generator and Alt/Gen styles available
  • Generator and alt/gen gearcover come in 8 rib, 4 rib or flat – style matches stock and is determined by year application
  • Alternator gearcovers are billet

*SH103 and P103 do not fit stock style shovel frames

These dyno graphs show the performance of several S&S vintage engines. The SH103 and SH93H engines feature the S&S Super Stock® cylinder heads, and produce exceptional power and torque compared to stock Harley-Davidson® shovelhead engines, which typically make about 50-55 horsepower. The performance of S&S P-Series engines is nearly identical since the S&S P-Series cylinder heads feature the same port and combustion chamber designs. The KN93 produces good torque, but the fairly faithful reproduction of the stock Harley-Davidson cylinder heads for knucklehead engines restricts airflow and limits high rpm horsepower.

S&S Vintage Engine Specifications

Engine Displacement Bore Stroke Cam Piston Type Compression Ratio
SH103 103" 3 5⁄8" 5" 600 S&S forged 9.7:1
SH93H 93" 3 5⁄8" 4 1/2" 600 S&S forged 9.1:1
SH93 93" 3 5⁄8" 4 1/2" 585 S&S forged 8.5:1
P103 103" 3 5⁄8" 5" 600 S&S forged 9.7:1
P93H 93" 3 5⁄8" 4 1/2" 600 S&S forged 9.1:1
P93 93" 3 5⁄8" 4 1/2" 585 S&S forged 8.5:1
P74 74" 3 7⁄16" 3 31⁄32" 513 S&S forged 7.5:1
KN93 93" 3 5⁄8" 4 1/2" 420 S&S forged 8.2:1
KN74 74" 3 7⁄16" 3 31⁄32" 346 S&S forged 7.5:1

Complete Carbureted SH-Series Engines

Engine Application Style Billet Gearcover Cast Gearcover
SH93 1966-’69 Chassis Generator 31-9906
1970-’84 Chassis Alternator 31-9905 31-9904
Custom Alternator/Generator 31-9979 31-9917
SH93H 1966-’69 Chassis Generator 31-9978 31-9909
1970-’84 Chassis Alternator 31-9908 31-9907
Custom Alternator/Generator 31-9980 31-9918
SH103 1970-’84 Chassis Alternator 31-9919
  Specify Specify 319-0005 319-0005

Complete Carbureted P-Series Engines

Application Style Warranty P74   P93 P93H  P103H
1948-'64 Chassis Generator 2 Years 310-0224
1955-’64 Chassis Generator 106-0819 106-0822 106-0825
1965-’69 Chassis Generator 106-0820 106-0823 106-0826
Custom 1970-’99 Alternator 106-2685 106-2696
Alternator/Generator 106-0821 106-0824 106-0827

KN-Series Engines

Description Part #
KN74 Generator Style 310-0025
KN93 Generator Style 106-2161
KN93 Alternator/Generator Style 106-2560
KN-Kone Alternator Style 310-0006