S&S Cycle

CAMSHAFTS FOR 1936–’47 OHV BIG TWINS

FITMENT • 1936–’47 OHV big twins • S&S® KN-Series engines FEATURES AND BENEFITS

• Quality construction—Made in-house by S&S Cycle in Viola, Wisc. • Higher lift and increased valve timing for better performance

APPLICATIONS KN346 Cam : This is a service part cam for 74" knuckle engines. The KN346 cam is ground to stock specifications. KN420 Cam: This "high-lift" cam for modified knuckle engines features .420" valve lift and increased duration for larger engines up to 93" and compression ratio of up to 8.5:1. Special high-lift valve springs are required.

CAMS FOR 1936–’47 OHV BIG TWINS & KN-SERIES ENGINES Cam Name Part # KN420 106-2409 KN346 106-3676 25522-36

CAM SPECIFICATIONS FOR 1936–’47 OHV BIG TWINS AND KN-SERIES ENGINES

Cam Timing (Open/Close)

Cam Duration

Lobe Centerline

Max Valve Lift

Valve Lift @ TDC

Cam Name

Intake

Exhaust 60°/30° 40°/12°

Intake

Exhaust

Intake

Exhaust

Intake

Exhaust

Intake

Exhaust

KN420

31°/55° 10°/51°

266° 241°

270° 232°

102°

110° 104°

.420" .346"

.420" .346"

.167" .085"

.152" .100"

KN346*

110.5°

*Ground to stock specifications.

NOTE: S&S can do a special order cam, please contact your S&S customer service representative for more information

132 S&S Vintage 1926–1999 Order 608-627-1497