Bombardier DS 650 Carburetion Data
| Carburetor | Type | Mikuni Constant Depression Type with Manual Choke | |
| Model | BSR42 | ||
| Idle Speed RPM | 1300 ± 100 | ||
| Main Jet | 165 | ||
| Needle Jet | 00 | ||
| Jet Needle | 6BCY22-60-4 | ||
| Needle Valve and Seat | 3.0 Hi Flow | ||
| Pilot Jet | 40 | ||
| Starter Jet No. 1 and No. 2 mm (in) | 45 - 0 1 (1.77 - 0 0.039) | ||
| Main Air Jet | 120 | ||
| Pilot Air Jet No. 1 | 110 | ||
| Pilot Air Jet No. 2 mm (in) | 1.3 (0.05) | ||
| Clip Position Number | 4 | ||
| Choke Plunger Position | 2 | ||
| Adjustment | Preliminary Pilot Screw Turn | Position for Maximum Speed at Idle | |
| Idle Speed Preliminary Adjustment | At Least 1 Turn | ||
| Float Level | ± 0.5 mm | 10 | |
| ± 0.020 in | 0.394 | ||
| Fuel | Type | Super Unleaded Gasoline | |
| Octane No. | 91 (Ron + Mon)/2 | ||