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Profile Number | Advertised Timings | DURATION | VALVE LIFT | TAPPET CLEARANCE | REMARKS | ||||||||||
Ex Op. B.B.D.C. | Ex Cl A.T.D.C | In Op. B.T.D.C. | In Cl A.B.D.C | Advertised | @ 0.050" | Gross. | @ T.D.C. | Ex. | In. | | |||||
102T | 61 | 15 | 20 | 60 | 260 | 260 | 208 | 208 | .390" | .390" | .024" | .030" | .012" | .010" | Torque. |
S/M | 65 | 25 | 25 | 65 | 270 | 270 | .350" | .350" | .012" | .010" | Mild. | ||||
113 | 65 | 25 | 25 | 65 | 270 | 270 | 207 | 207 | .398" | .398" | .027" | .033" | .012" | .010 | |
154 | 71 | 25 | 31 | 70 | 276 | 281 | 216 | 227 | .400" | .400 | .033" | .054" | .012" | .010" | Rally. |
401 | 77 | 34 | 37 | 74 | 291 | 291 | 241 | 241 | .415" | .415" | .012" | .010" | |||
121X | 75 | 41 | 45 | 72 | 296 | 296 | 240 | 240 | .415" | .415" | .012" | .010" | Rally/ injected. | ||
Notes -
- Profiles suit both twin carbrettor and single carbrettor engines.
- New camshafts available.
- Care must be taken when tensioning the cylinder, to set side clearance on the rocker arms.