Phone 360 985-0445, E-mail Keith@Johnsoncams.com
Norton
| Stock cam for Norton Atlas and Commando, 750's and 850's. | ||||||||
| $325.00 | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .327 | 102° | .006 | Flat | 281° 258° |
38°btdc 27°btdc |
63°abdc 51°abdc |
.020 .040 |
| Exhaust | .327 | 110° | .008 | Flat | 281° 258° |
70°bbdc 58°bbdc |
31°atdc 20°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| 2-S factory Combat cam. | ||||||||
| $325.00 | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .384 | 105° | .008 | Flat | 286° 269° |
39°btdc 30°btdc |
67°abdc 59°abdc |
.020 .040 |
| Exhaust | .350 | 105° | .010 | Flat | 301° 277° |
76°bbdc 64°bbdc |
45°atdc 33°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| 4-S factory Combat cam. | ||||||||
| $325.00 | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .396 | 105° | .008 | Flat | 303° 278° |
46.5°btdc 34°btdc |
76.5°abdc 64°abdc |
.020 .040 |
| Exhaust | .350 | 105° | .010 | Flat | 301° 277° |
76°bbdc 64°bbdc |
45°atdc 33°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Johnson design for 1/2 mile and mile flat track or road racing in 500 twins, also good for short track TT and hot street 750s. | ||||||||
| $325.00 | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .360 | 102° | .008 | Flat | 295° 272° |
45°btdc 33°btdc |
70°abdc 59°abdc |
.020 .040 |
| Exhaust | .360 | 110° | .008 | Flat | 295° 272° |
78°bbdc 63°bbdc |
37°atdc 29°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Johnson designed. A smoother version of the PW3, good for flat track and road racing in 750s. | ||||||||
| $325.00 | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .380 | 102° | .008 | Flat | 294° 270° |
44°btdc 33°btdc |
70°abdc 57°abdc |
.020 .040 |
| Exhaust | .380 | 110° | .008 | Flat | 294° 270° |
76°bbdc 64°bbdc |
38°atdc 25°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| The Norris SS cam is good for top end power, not a Norton strong point. Magnaflux crank, use fresh rods | ||||||||
| $325.00 | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .359 | 105° | .008 | Flat | 307° 280° |
49°btdc 36°btdc |
78°abdc 64°abdc |
.020 .040 |
| Exhaust | .359 | 104° | .010 | Flat | 307° 280° |
78°bbdc 64°bbdc |
49°atdc 36°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services