S&S Cycle

1984–'99 big twins

1984–1999 Evolution ® 1926–1984 Vintage Engines Tools & Shop Supplies Warranty & Company Policy Appendix & Index

CAMSHAFTS

RECOMMENDED APPLICATIONS FOR S&S CAMS OES: Original Equipment Specification (OES) A bolt-in replacement camwith stock cam timing is designed for riders with stock engines. Does not require tuning. Bolt-in stock. Equivalent to HD® L-Grind 490LR: Hydraulic Bolt-In. Designed for broad power range improvement. Good choice for heavy bikes and trailer towing. Increases low and mid range performance. Works well with stock compression ratio and stock exhaust. No valve spring change required. Basic rpm Idle–5000. 508: Bolt-in cam intended for stock engines with less than 10:1 compression ratio. Quiet valvetrain with excellent low/mid range torque for touring and 2 up riding. 510V: Bolt-in cam that works well with stock or ported heads. Improved ramp design results in low valve train noise. Meant for engines up to 96" and 10:1 compression ratio. 3000–5000 rpm. 520: A replacement part for S&S emissions certified engines, this is a short duration emissions cam with very little overlap to reduce emissions of unburned hydrocarbons. Requires high lift springs and normal clearance checks. 1000–4500 rpm (80"–96"). 543: A replacement cam for newer S&S 41/8" bore V-series emissions certified engines for OE and custom applications. High lift, short duration and no overlap. Requires high lift springs and normal clearance checks. 1000–4000 rpm (111"–124"). 561: For 80"–96" engines at 9.5:1–10.5:1 compression ratio. Provides strong midrange power. 3000–5500 rpm. 585V: A versatile cam for 80" to 96" engines with 10:1–10.5:1 compression, and larger engines with 9.5:1–10:1 compression ratios. 3500–6000 rpm. 600: An exceptional cam in any large displacement engine with 9.5:1 to 10.5:1 compression. 3500–6000 rpm. 631: For high rpm applications, an excellent choice for all street and racing engines with 11:1 and higher compression ratios. Great performance cam, but expect more "wear and tear" on valve train components. Valve spring spacing and other normal clearancing checks required. 4500–6500 rpm. 640: For large displacement motors with compression ratios of 10.5–11.5:1, or smaller motors with 11:1–12:1 compression ratio. Does not require as much compression as the 631 and provides a more linear power delivery. 3000–6000 rpm. 675: Designed for use with S&S special application cylinder heads, but can be used with other cylinder heads with appropriate valve springs. Intended for large displacement competition engines of 120 cubic inches or more, and 11:1 or greater compression. 4500–6500 rpm.

33-5124

CAMS FOR 1984–'99 BIG TWIN ENGINES Cam Name Part #

330-0290 330-0371

OES

490LR

330-0093

508

33-5124

510V

520

33-5073 USA 1,2

330-0181

543

33-5076

561

33-5109

585V

33-5058

600

33-5080

631

33-5108

640

675 33-5133 DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE. NOT LEGAL FOR SALE OR USE NATIONWIDE ON ANY FEDERAL POLLUTION CONTROLLED MOTOR VEHICLE UNDER THE CLEAN AIR ACT

NOTE: S&S can do a special order cam. Contact your S&S Customer Service Representative for more information.

S&S CAM SPECIFICATIONS FOR 1984–'99 BIG TWIN ENGINES

Valve Timing Open/Close

Valve Duration

Lift @ TDC

Intake

Exhaust

Spring Spacing Required

Tappet Type Required

Cam Name

Intake 216.0°

Exhaust

Valve Lift

Intake 0.060"

Exhaust

OpenBTDC/CloseABDC OpenBBDC/CloseATDC

OES

2.0°/34.0° 12°/34° 11°/25° 20°/38° 0°/40° -26°/52° -25°/44°

36.0°/4.0° 41°/15° 50°/5° 52°/20° 50°/2° 49°/-1° 33°/-10°

220.0°

.475" 490" .508" .510" .520" .543" .543" .546" .560" .585" .600" .630" .640" .675"

0.060"

No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Hydraulic Hydraulic Hydraulic Hydraulic Hydraulic Hydraulic Hydraulic Hydraulic Hydraulic Hydraulic Hydraulic

490LR

226° 217° 238° 220° 206° 199° 240° 252° 245° 255° 275° 265° 269°

236° 235° 252° 232° 228° 203° 237° 256° 260° 260° 275° 265° 275°

.146" .141" .187" .086" .017" .018" .126" .252" .186" .192" .281" .222" .235"

.157" .110" .178" .094" .083" .053" .106" .210" .180" .184" .221" .192" .209"

508

510V

520

Front Rear

543*

546 561

5°/55° 32°/40° 20°/45° 20°/55° 34°/61° 25°/60° 25°/64°

52°/5° 50°/26° 60°/20° 60°/20° 66°/29° 65°/20° 70°/25°

585V

600 631 640 675

Solid or Hydraulic

Hydraulic Hydraulic

*Emissions cams front and rear do not have identical timing. Negative values are due to special timing for reduced emissions.

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