| Model year / description |
| Item |
| to July 1971 |
July 71 to Sept 1972 |
Sept 1972 on |
|
| Engine code |
|
| Engine type |
| 2 cyl boxer |
2 cyl boxer |
2 cyl boxer |
|
| Capacity |
|
| Cooling |
| Aircooled |
Aircooled |
Aircooled |
|
| Electrical system |
| 6v -ve earth |
6v -ve earth |
12v -ve earth |
|
| Oil change / service interval |
| 3100mi (5000Km) |
3100mi (5000Km) |
3100mi (5000Km) |
|
| Oil type |
| 10W30 |
10W30 / 20W40 |
10W30 / 20W40 |
|
| Oil capacity |
| 2 litres |
2 litres |
2 litres |
|
| Plugs gap |
| 0.8mm / 0,032" |
0.8mm / 0.032" |
0.8mm / 0.032" |
|
| Points gap |
| 0.4-0.5mm / .016-.020" |
0.4-0.5mm / .016-.020" |
0.4-0.5mm / .016-.020" |
|
| Timing |
| 6 deg BTDC |
5deg ATDC |
5deg ATDC |
|
| Inlet valve clearance (cold) |
| 0.1mm / .004" |
0.1mm / .004" |
0.1mm / .004" |
|
| Exhaust valve clearance (cold) |
| 0.15mm / 0.006" |
0.15mm / 0.006" |
0.15mm / 0.006" |
|
| Idle Speed |
| 725rpm +- 25 |
900rpm |
900rpm |
|
