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ENGINE<br />

AUDIO<br />

WINDSHIELDS<br />

SEATS &<br />

SISSY BARS<br />

S&S ® CAMSHAFTS<br />

• Flathead power KN-Series engines<br />

• Quality construction, made in-house by S&S ® Cycle in Viola, WI<br />

• Higher lift and increased valve timing for better performance<br />

KN420 Cam<br />

This high-lift cam for modified Knuckle engines features .420" valve lift and<br />

increase duration for larger engines up to 93" and compression ratio of up to<br />

8.5:1.Special high-lift valve springs are required.<br />

KN421 Cam<br />

Intended for large displacement engines such as the 103" engines produced by<br />

the original Flathead Power company. .420" valve lift with longer duration than<br />

the KN420. Special high-lift valve springs are required.<br />

Timing Timing @.053 Valve Lift Spring Spacers Lifters<br />

Open Closed Duration Lift @ TDC Required Required<br />

KN420 Retail Intake 31° 55° 266° .420” .167"<br />

36-47 OHV Big Twin 49-8984 $189.95 Exhaust 60° 30° 270° .420 .152" Yes Solid<br />

KN421 Intake 38° 62° 280° .420 .191"<br />

36-47 OHV Big Twin 49-8983 $189.95 Exhaust 70° 30° 280° .420 .152" Yes Solid<br />

ANDREWS CAMS<br />

KNUCKLE ENGINES<br />

Amazing, but there are still a lot of<br />

Knuckle engines going strong. They have<br />

been around for more than 65 years.<br />

How many other bikes can make this kind<br />

of a claim for long life and durability.<br />

N<br />

• Stock Knuckle replacement cam<br />

• For stock motors and restoring a<br />

classic engine, this is the cam to use<br />

S<br />

• Bolt-in Knuckle performance cam for<br />

stock motors, smooth idle, strong pull<br />

to 6000 RPM<br />

• This cam is the Knuckle equivalent of<br />

a "B" cam in a Shovel motor<br />

K<br />

• Knuckle performance cam for stroked<br />

motors; strong pull to 6000 RPM<br />

• This is the Knuckle equivalent of a<br />

“C” cam<br />

Timing Timing Valve Valve Lift<br />

Open Closed Duration Lift TDC Springs<br />

N Retail Intake 13° 41° 234° .348 .089 Stock<br />

36-47 OHV Big Twin 49-5417 $163.95 Exhaust 44° 16° 240° .348 .105<br />

S Intake 27° 55° 262° .370 .130 Hi-Lift<br />

36-47 OHV Big Twin 49-5418 $163.95 Exhaust 55° 27° 262° .370 .130<br />

K Intake 35° 63° 278° .368 .156 Hi-Lift<br />

36-47 OHV Big Twin 49-5419 $163.95 Exhaust 63° 35° 278° .368 .156<br />

LUGGAGE<br />

EXHAUST<br />

FUEL & AIR<br />

CONTROL &<br />

HANDLEBARS<br />

CABLES<br />

FOOT<br />

CONTROLS<br />

WHEELS<br />

& TIRES<br />

CHASSIS &<br />

SUSPENSION<br />

SHEET METAL<br />

BRAKES<br />

INSTRUMENT<br />

& LIGHTING<br />

ELECTRICAL<br />

ENGINE<br />

PRIMARY<br />

DRIVE<br />

TRANSMISSION<br />

& FINAL DRIVE<br />

GASKETS, SEALS<br />

& HARDWARE<br />

TRAILERS<br />

& RAMPS<br />

CHEMICAL<br />

TOOLS &<br />

SUPPLIES<br />

GENERAL<br />

ACCESSORIES<br />

DISPLAY<br />

& PROMO<br />

929<br />

ENGINE

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