S&S Cycle - S&S Performance Parts 2025 L - Volume 67

1999-'06

Phone: 608-627-1497

Specifications Of S&S® Chain & Gear Drive Camshafts For 1999-Up Big Twins

1 -2017-UP 2 -2007-'17 3 -1999-'06 4 -1984-'99 5 -1936-'84 6 -XL-RA1250 7 -BELTS & GASKETS 8 -TOOLS 9 -WARRANTY 10 -APPENDIX

Valve Timing v(open/ close)

Valve Lift

Valve Duration

Centerline

Lift @ TDC

Application CROSS REFERENCE

Intake Open BTDC/ Close ABDC

Exhaust

Intake

Exhaust

Intake

Exhaust

Intake

Exhaust HD®

Cam Name

Bolt In

Most Fitting

Open BBDC/ Close ATDC

Screamin’ Eagle®

Andrews®

x

OES

2˚/34˚

36˚/4˚

216˚ 220˚

475"

106˚

106˚

060"

060" A-Grind

x

509

18˚/18˚

46˚/11˚

216˚ 237˚

509"

90˚

107 5˚ 174"

140"

x

510

20˚/38˚

52˚/20˚

238˚ 252˚

510"

99˚

106˚

187"

178"

551**

17°/19°

41°/17°

216° 238°

550"

91˚

102˚

178"

170" SE-203/255 21H/26H

Touring

570

20˚/40˚

55 ˚/20˚

240˚ 255˚

570"

100˚

107 5˚ 187"

179" –

54H

All Big Twin

583

5˚/18˚

58˚/24˚

203˚ 262˚

583"

96 5˚

107˚

113"

206" SE-203/255 21H/26H

Softail®/Dyna®

SE 211/251/257

31H/32H/ 50H/55H/67H

585

20˚/45˚

60˚/20˚

245˚ 260˚

585"

102 5˚ 110˚

186"

179"

All Big Twin

625

20˚/55˚

60˚/20˚

255˚ 260˚

625"

107 5˚ 110˚

189"

184" SE-258/260 60H

All Big Twin

635

19 5°/43 5° 58 5°/37 5° 243° 276°

635"

102°

100 5°

186"

284"

MR103

13°/33°

50°/22°

226° 252°

585"

104°

104°

172"

177"

HP103

20°/49°

45°/26°

249° 251°

575"

102 7° 101 5° 199"

206"

640

25˚/60˚

65˚/25˚

265˚ 270˚

640"

107 5˚ 110˚

228"

214" SE-264

59H

All Big Twin

675 Race *Note: Although several cam grinds were used in stock engines from 1999-’06, the timing specs of the 475G cams is most similar to cams used in 1999-’03 EFI engines **551 cams are not recommended with compression ratio of 10:1 or higher 25˚/64˚ 70˚/25˚ 269˚ 275˚ 675" 109 5˚ 112 5˚ 235" 205" – 64H

All reference to HD® and Andrews® part numbers is for identification purposes only. We in no way are implying that any of S&S Cycle’s products are original equipment parts or that they are equivalent to the corresponding HD® part number shown. Use of brand names such as Harley-Davidson® Sportster® are also for reference only.

S&S Easy Start Cams Start any engine regardless of displacement or compression ratio, with a stock starter Easy Start Cams from S&S® Cycle make hard starting obsolete for 1999-'12 big twins Available in economical chain drive and rock-solid gear drive versions Don’t get caught “dead” without them! Features and Benefits • Start any engine with a stock starter • Save your starter and battery! • Reliable – tested for 100,000 accumulative starts and over 150,000 road miles without breakage or compression release failure! • Automatic – no buttons to push Options • Chain drive or gear drive (See the following pages for part numbers) Here’s How It Works Each of the two exhaust cam lobes are equipped with a spring loaded compression release lobe on the “heel” of the cam at the point where the valve would normally be fully closed The lobe holds the exhaust valve open slightly at cranking speed This releases some of the compression, making the engine much easier to crank Once the engine starts, and rpm increases, the compression release lobe is centrifugally retracted and the engine runs normally, with full

compression, and without any loss in performance This allows a stock starter and battery to start nearly any engine

The compression release lobe reduces compression until the engine starts.

Increased rpm causes the compression release lobe to be centrifugally retracted so the engine runs normally.

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