| Engine | Displacement | Bore & Stroke | Power output (max.) | Net Torque | ||
| BT SERIES | ||||||
| 161F | 123 cc (7.51 cu·in) |
61.0 x 42.0 mm (2.4 x 1.65 in) | 3.0 HP at 3,600 rpm | – | ||
| 168FA(E) | 163 cc (9.95 cu·in) |
68.0 x 45.0 mm (2.68 x 1.77 in) | 4.5 HP at 3,600 rpm | 8.8 Nm | ||
| 168FB(E) | 196 cc (11.96 cu·in) |
68.0 x 54.0 mm (2.68 x 2.13 in) | 5.0 HP at 3,600 rpm | 10.7 Nm | ||
| 170F(E) | 208 cc (11.96 cu·in) |
70.0 x 54.0 mm (2.76 x 2.13 in) | 5.5 HP at 3,600 rpm | 11.0 Nm | ||
| 173F(E) | 243 cc (14.83 cu·in) |
73.0 x 54.0 mm (2.87 x 2.13 in) | 6.5 HP at 3,600 rpm | 14.0 Nm | ||
| 177F(E) | 270 cc (16.5 cu·in) |
77.0 x 58.0 mm (3.03 x 2.28 in) | 8.0 HP at 3,600 rpm | 15.8 Nm | ||
| 182F(E) | 338 cc (20.63 cu·in) |
82.0 x 64.0 mm (3.23 x 2.52 in) | 9.0 HP at 3,600 rpm | 20.1 Nm | ||
| 188F(E) | 389 cc (23.74 cu·in) |
88.0 x 64.0 mm (3.46 x 2.52 in) | 10.0 HP at 3,600 rpm | 22.0 Nm | ||
| 190F(E) | 420 cc (25.63 cu·in) |
90.0 x 66.0 mm (3.54 x 2.6 in) | 10.5 HP at 3,600 rpm | 23.0 Nm | ||
| GB SERIES | ||||||
| GB160 | 163 cc (9.95 cu·in) |
68.0 x 45.0 mm (2.68 x 1.77 in) | 4.3 HP at 3,600 rpm | 8.8 Nm | ||
| GB200 | 196 cc (11.96 cu·in) |
68.0 x 54.0 mm (2.68 x 2.13 in) | 5.6 HP at 3,600 rpm | 11.5 Nm | ||
| GB200A | 196 cc (11.96 cu·in) |
68.0 x 54.0 mm (2.68 x 2.13 in) | 5.5 HP at 3,600 rpm | 11.5 Nm | ||
| GB200S | 196 cc (11.96 cu·in) |
68.0 x 54.0 mm (2.68 x 2.13 in) | 5.6 HP at 3,600 rpm | 11.5 Nm | ||
| GB200H | 196 cc (11.96 cu·in) |
68.0 x 54.0 mm (2.68 x 2.13 in) | 5.0 HP at 3,600 rpm | 11.0 Nm | ||
| GB210 | 208 cc (12.69 cu·in) |
70.0 x 54.0 mm (2.76 x 2.13 in) | 6.0 HP at 3,600 rpm | 11.5 Nm | ||
| GB225 | 223 cc (13.61 cu·in) |
72.0 x 55.0 mm (2.83 x 2.17 in) | 6.0 HP at 3,600 rpm | 12.9 Nm | ||
| GB270 | 272 cc (16.60 cu·in) |
75.0 x 61.5 mm (2.95 x 2.42 in) | 8.0 HP at 3,600 rpm | 15.5 Nm | ||
| GB420S | 420 cc (25.63 cu·in) |
90.0 x 66.0 mm (3.54 x 2.6 in) | 12.5 HP at 3,600 rpm | 27.0 Nm | ||
| GB620 | 625 cc (38.15 cu·in) |
96.0 x 86.4 mm (3.78 x 3.4 in) | 19.0 HP at 3,600 rpm | 42.0 Nm | ||
| GB680 | 679 cc (41.44 cu·in) |
78.0 x 71.0 mm (3.07 x 2.8 in) | 20.0 HP at 3,600 rpm | 42.0 Nm | ||
| GB750S | 750 cc (45.8 cu·in) |
82.0 x 71.0 mm (3.23 x 2.8 in) | 22.0 HP at 3,900 rpm | 47.0 Nm | ||
| GB1000S | 999 cc (60.96 cu·in) |
90.0 x 78.5 mm (3.54 x 3.09 in) | 33.0 HP at 3,900 rpm | 71.0 Nm | ||
| NH SERIES | ||||||
| NH80 | 72 cc (4.82 cu·in) |
51.0 x 38.8 mm (2.01 x 1.53 in) | 1.9 HP at 3,600 rpm | 3.7 Nm | ||
| NH100 | 90 cc (6.04 cu·in) |
57.0 x 38.8 mm (2.24 x 1.53 in) | 2.3 HP at 3,600 rpm | 4.4 Nm | ||
| NH130 | 132 cc (8.06 cu·in) |
61.0 x 45.0 mm (2.4 x 1.77 in) | 3.0 HP at 3,600 rpm | 6.5 Nm | ||
| NH150 | 149 cc (9.09 cu·in) |
65.0 x 45.0 mm (2.56 x 1.77 in) | 3.4 HP at 3,600 rpm | 7.2 Nm | ||
| NH150H | 149 cc (9.09 cu·in) |
65.0 x 45.0 mm (2.56 x 1.77 in) | 3.4 HP at 3,600 rpm | 7.2 Nm | ||
| NH225 | 224 cc (13.7 cu·in) |
77.0 x 55.0 mm (3.03 x 5.17 in) | 6.1 HP at 3,600 rpm | 12.5 Nm | ||
