Phone 360 985-0445 or email Keith@johnsoncams.com
Triumph Cams
we regret to inform you that we are unable to accept orders for
camshafts or cylinder head services until further notice
Due to a heavy backlog of existing orders
also please note that we are, like most businesse not open for business on weekends or holidays.
our business hours are 9AM to 5PM Pacific Standard Time
we will be glad to let you know when we are again accepting orders
please send an e-mail with your request to be put on our wait list
including what camshaft or service you wish to order
thanks for your interest
11 December 2007
500 Twin
650/ 750's
| Factory speed kit grind for 500's of the 50's, also used in the 650 TT Specials of the 60's. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .316 | 105° | .002 | R | 271° 251° |
31°btdc 21°btdc |
60°abdc 50°abdc |
.020 .040 |
| Exhaust | .316 | 105° | .004 | R | 271° 251° |
61°bbdc 51°bbdc |
30°atdc 20°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
|
A little more duration than the Q cam, gives a little more top end power. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .310 | 105° | .002 | R | 276° 255° |
33°btdc 21°btdc |
65°abdc 53°abdc |
.020 .040 |
| Exhaust | .310 | 105° | .004 | R | 276° 255° |
62°bbdc 52°bbdc |
35°atdc 23°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| A little more lift than the Q cam. For more mid-range torque. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .326 | 105° | .002 | R | 267° 246° |
31°btdc 20°btdc |
56°abdc 46°abdc |
.020 .040 |
| Exhaust | .326 | 105° | .004 | R | 267° 246° |
61°bbdc 50°bbdc |
26°atdc 16°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Lots of torque off tight corners. Tight TT, short Motocross, not good at high rpm. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .353 | 105° | .002 | R | 280° 261° |
31°btdc 21°btdc |
69°abdc 59°abdc |
.020 .040 |
| Exhaust | .353 | 105° | .004 | R | 280° 261° |
61°bbdc 51°bbdc |
39°atdc 29°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Johnson designed for 750 Triple Road racing, and by coincidence is a modern version of the TH6. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .353 | 102° | .008 | S | 305° 277° |
51° 373° |
73° 60° |
.020 .040 |
| Exhaust | .353 | 110° | .008 | S | 305° 377° |
83° 69° |
41° 29° |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Stock 750 triple cam. Has always been hard to beat and works well in 500 twins also. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .328 | 102° | .006 | R | 393° 264° |
44°btdc 30°btdc |
69°abdc 54°abdc |
.020 .040 |
| Exhaust | .328 | 105° | .008 | R | 293° 264° |
72°bbdc 57°bbdc |
41°atdc 27°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Between a Q and a Jomo 15. Good for hot street, short track, and TT in 650 and 750 twins. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .344 | 105° | .008 | R | 280° 255° |
36°btdc 23°btdc |
64°abdc 52°abdc |
.020 .040 |
| Exhaust | .344 | 105° | .010 | R | 280° 255° |
66°bbdc 53°bbdc |
35°atdc 22°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Stock 750 twin intake. Use in exhaust also, for hot street motors- and racing, where endurance means more than the last HP. Good to 7000rpm with stock springs. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .345 | 105° | .010 | S | 294° 270° |
40°btdc 29°btdc |
74°abdc 61°abdc |
.020 .040 |
| Exhaust | .345 | 105° | .010 | S | 294° 270° |
71°bbdc 59°bbdc |
44°atdc 32°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| This cam has long been considered the classic "all around" racing cam for the Triumph 650 and 750 twins. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .354 | 106° | .006 | R | 289° 267° |
37°btdc 28°btdc |
72°abdc 60°abdc |
.020 .040 |
| Exhaust | .354 | 106° | .008 | R | 289° 267° |
69°bbdc 59°bbdc |
39°atdc 29°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
|
This grind is an improved version of the Jomo 15. With less seat to seat timing the motor makes more torque, and runs "crisper" down low. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .352 | 105° | .008 | S | 290° 267° |
39°btdc 28°btdc |
71°abdc 58°abdc |
.020 .040 |
| Exhaust | .352 | 105° | .008 | S | 290° 267° |
69°bbdc 58°bbdc |
41°atdc 28°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Developed by Doug Hele for the factory 500 twin road racers of the late 60's, also used in the 750 triples of the 70's. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .350 | 105° | .006 | R | 305° 274° |
49°btdc 33°btdc |
77°abdc 61°abdc |
.020 .040 |
| Exhaust | .350 | 105° | .008 | R | 305° 274° |
79°bbdc 63°bbdc |
47°atdc 31°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Johnson design for short rod 750 twins. Works very well for flat track use and are used in the Johnson Cams Triumph Flattracker. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .375 | 102° | .008 | S | 300° 276° |
49°btdc 36°btdc |
71°abdc 60°abdc |
.020 .040 |
| Exhaust | .375 | 110° | .008 | S | 300° 276° |
80°bbdc 68°bbdc |
39°atdc 27°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| For 1/2 mile and mile flat track and real racers. NOT FOR THE FAINT OF HEART!. Must trim flywheel and tappet blocks. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .400 | 105° | .008 | S | 306° 283° |
49°btdc 37°btdc |
77°abdc 65°abdc |
.020 .040 |
| Exhaust | .400 | 105° | .010 | S | 306° 283° |
79°bbdc 67°bbdc |
47°atdc 35°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Johnson Design for a smoother, modern version of the Sifton 460 cam. This grind was developed to be easier on springs, tappets, etc. Must trim flywheel and tappet blocks. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .410 | 102° | .008 | S | 303° 279° |
50°btdc 38°btdc |
73°abdc 61°abdc |
.020 .040 |
| Exhaust | .410 | 110° | .008 | S | 303° 279° |
82°bbdc 70°bbdc |
41°atdc 29°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services
| Johnson design drag race cam. It is not recommended for anything other than drag racing. Must trim flywheel and tappet blocks. | ||||||||
| $360pr. | Lift | LCA | Lash | Tappet | Duration | Open | Close | At |
| Intake | .443 | 102° | .008 | S | 316° 290° |
57°btdc 44°btdc |
79°abdc 66°abdc |
.020 .040 |
| Exhaust | .443 | 110° | .008 | S | 316° 290° |
89°bbdc 76°bbdc |
47°atdc 35°atdc |
.020 .040 |
Cam Chart Definitions Home Page FAQ'S Cylinder Head Services