1978 Suzuki SP370
Specifications and workshop reference information for the 1978 Suzuki SP370, 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 | Air-cooled 4-stroke single-cylinder |
| Displacement | 370 cc |
| Bore × Stroke | 85.0 × 65.0 mm |
| Compression Ratio | 9.2:1 |
| Maximum Power | ~27 hp |
| Maximum Torque | ~28 Nm |
| Carburetor | Mikuni VM ~34 mm |
| Lubrication | Wet sump |
| Fuel Mix Ratio | N/A |
| Ignition | Points |
| Spark Plug | NGK D8EA |
| Spark Plug Gap | 0.6–0.7 mm |
Transmission
| Transmission Type | 5-speed manual |
| Clutch | Wet multi-plate |
| Primary Reduction | ~2.95 |
| Final Reduction | ~3.07 |
| Overall Reduction | N/A |
Dimensions
| Overall Length | ~2150 mm |
| Overall Width | ~870 mm |
| Overall Height | ~1170 mm |
| Wheelbase | ~1405 mm |
| Ground Clearance | ~240 mm |
| Fuel Tank Capacity | ~9.5 L |
Chassis
| Frame Type | Steel single cradle |
| Caster Angle | ~28° |
| Trail | ~110 mm |
| Front Suspension | Telescopic forks |
| Rear Suspension | Twin shock |
| Front Suspension Travel | ~180 mm |
| Rear Suspension Travel | ~100 mm |
Brakes & Wheels
| Front Tire | 3.00-21 |
| Rear Tire | 4.00-18 |
| Front Brake | Drum |
| Rear Brake | Drum |
370cc Other Specs
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