| Engine | Displacement | Bore & Stroke | Power output (max.) | Net Torque | ||
| B SERIES | ||||||
| 1B20 | 243 cc (14.83 cu·in) |
69.0 x 65.0 mm (2.72 x 2.56 in) | 4.7 HP at 3,600 rpm | 10.5 Hm at 2,500 rpm | ||
| 1B20V | 243 cc (14.83 cu·in) |
69.0 x 65.0 mm (2.72 x 2.56 in) | 4.7 HP at 3,600 rpm | 10.5 Hm at 2,500 rpm | ||
| 1B27 | 280 cc (17.09 cu·in) |
74.0 x 65.0 mm (2.91 x 2.56 in) | 5.4 HP at 3,600 rpm | 12.5 Hm at 2,300 rpm | ||
| 1B30 | 347 cc (21.18 cu·in) |
80.0 x 69.0 mm (3.15 x 2.72 in) | 7.2 HP at 3,600 rpm | 17.5 Hm at 2,300 rpm | ||
| 1B30V | 347 cc (21.18 cu·in) |
80.0 x 69.0 mm (3.15 x 2.72 in) | 7.2 HP at 3,600 rpm | 17.5 Hm at 2,300 rpm | ||
| 1B40 | 462 cc (28.19 cu·in) |
88.0 x 76.0 mm (3.46 x 2.99 in) | 10.1 HP at 3,600 rpm | 24.9 Hm at 2,300 rpm | ||
| 1B40V | 462 cc (28.19 cu·in) |
88.0 x 76.0 mm (3.46 x 2.99 in) | 10.1 HP at 3,600 rpm | 24.9 Hm at 2,300 rpm | ||
| 1B50 | 517 cc (31.5 cu·in) |
93.0 x 76.0 mm (3.66 x 2.99 in) | 11.4 HP at 3,600 rpm | 27.4 Hm at 2,500 rpm | ||
| 1B50V | 517 cc (31.5 cu·in) |
93.0 x 76.0 mm (3.66 x 2.99 in) | 11.4 HP at 3,600 rpm | 27.4 Hm at 2,500 rpm | ||
