FastCounter by bCentral

    The lobe shapes listed below were (at one time) supplied by Harry Weber Cams (now Web-Cam). The cam duration is listed at various lobe height increments. I have not interpolated these to get intermediate figures, since the rate of acceleration may be different. Part numbers given in “Comments” are KNS Kustom numbers; click on a number for the KNS Kustom recommendation for use.

H-D Side-Valve Cam Profiles

Master Nº

Lift

Comment

.010”

.020”

.040”

.050”

.100”

.150”

.200”

.300”

61      

.318”

25505-04R, mild 45 intake
25515-04R, 45 exhaust

278°

270°

256°

250°

223°

194°

162°

  62°

62      

.357”

25506-04R, hot 45 intake

298°

290°

280°

274°

246°

218°

188°

112°

44      

.377”

25507-04R, very hot 45 intake
25527-04R, U-Series intake

294°

288°

276°

270°

244°

218°

190°

124°

16      

.380”

25528-04R, very hot U-Series intake

314°

310°

300°

294°

268°

242°

210°

136°

Click here for Harley-Davidson stroker flywheels

Knuckle, Panhead
1941-54

Pan, Shovelhead
1955-71

Shovelhead
1972-81

Sportster
1957-*

45 WL, trike
1937-73

74, 80” Flathead
1937-48

80”

84”

86”

88”

80”

84”

86”

88”

80”

4-1/2”

4-5/8”

4-13/16”

4-7/16”

4-1/2”

4-5/8”

84”

86”

88”

92”

"Harley-Davidson" name for reference purposes only. Not affiliated with Harley-Davidson Motor Co.

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