1990 Suzuki RM125 Specifications and Specs
Specifications and workshop reference information for the 1990 Suzuki RM125, 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 | Single-cylinder, liquid-cooled, case reed valve, 2-stroke |
| Displacement | 124 cc |
| Bore × Stroke | 54.0 mm × 54.0 mm |
| Compression Ratio | 8.7:1 |
| Maximum Power | 38 hp @ 10,750 rpm |
| Maximum Torque | 24.0 Nm @ 9,750 rpm |
| Carburetor | Mikuni TM35SS, 35 mm flat slide |
| Lubrication | Premix |
| Fuel Mix Ratio | 20:1 |
| Ignition | Suzuki PEI CDI |
| Spark Plug | NGK BR8ES |
| Spark Plug Gap | 0.6 - 0.7 mm |
Transmission
| Transmission Type | 6-speed constant mesh |
| Clutch | Wet multi-plate |
| Primary Reduction | 3.409 (58/17) |
| Final Reduction | 3.846 (50/13) |
| Overall Reduction | 11.42:1 |
Dimensions
| Overall Length | 2160 mm |
| Overall Width | 815 mm |
| Overall Height | 1265 mm |
| Wheelbase | 1475 mm |
| Ground Clearance | 365 mm |
| Fuel Tank Capacity | 8.5 L |
Chassis
| Frame Type | Chrome-moly steel single-cradle frame |
| Caster Angle | 27.5° |
| Trail | 116 mm |
| Front Suspension | 43 mm Kayaba cartridge forks |
| Rear Suspension | Suzuki Full Floater monoshock |
| Front Suspension Travel | 305 mm |
| Rear Suspension Travel | 305 mm |
Brakes & Wheels
| Front Tire | 80/100-21 |
| Rear Tire | 100/100-18 |
| Front Brake | Single hydraulic disc |
| Rear Brake | Single hydraulic disc |
125cc Other Specs
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