1977 Suzuki RM250
Specifications and workshop reference information for the 1977 Suzuki RM250, including engine, chassis, service data and setup details.
Note: Specs are compiled from factory data, manuals and owner feedback. Bikes vary — if yours is different, jump into the forum and share it.
General Specifications
| Engine Type | 246cc, air-cooled, 2-stroke single |
| Displacement | 246 cc |
| Bore × Stroke | 70.0 mm × 64.0 mm |
| Compression Ratio | ~7.0:1 |
| Maximum Power | ~36 hp |
| Maximum Torque | ~30 Nm |
| Carburetor | Mikuni VM36 |
| Lubrication | Premix |
| Fuel Mix Ratio | 20:1 |
| Ignition | Magneto / CDI |
| Spark Plug | NGK B8ES |
| Spark Plug Gap | 0.6–0.7 mm |
Transmission
| Transmission Type | 5-speed manual |
| Clutch | Wet multi-plate |
| Primary Reduction | ~3.000 |
| Final Reduction | ~3.615 (47/13) |
| Overall Reduction | N/A |
Dimensions
| Overall Length | ~2180 mm |
| Overall Width | ~820 mm |
| Overall Height | ~1200 mm |
| Wheelbase | ~1460 mm |
| Ground Clearance | ~300 mm |
| Fuel Tank Capacity | ~9.0 L |
Chassis
| Frame Type | Steel single cradle |
| Caster Angle | ~28.0° |
| Trail | ~120 mm |
| Front Suspension | Telescopic forks |
| Rear Suspension | Twin shock |
| Front Suspension Travel | ~220 mm |
| Rear Suspension Travel | ~200 mm |
Brakes & Wheels
| Front Tire | 3.00-21 |
| Rear Tire | 4.50-18 |
| Front Brake | Drum |
| Rear Brake | Drum |
250cc Other Specs
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