1983 KTM 250MX
Specifications and workshop reference information for the 1983 KTM 250MX, 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, two-stroke, reed valve |
| Displacement | 244 cc |
| Bore × Stroke | 70 × 64 mm |
| Compression Ratio | Approx. 13.5:1 |
| Maximum Power | ~38 hp |
| Maximum Torque | |
| Carburetor | Bing 36 mm |
| Lubrication | Premix |
| Fuel Mix Ratio | 40:1 |
| Ignition | Motoplat |
| Spark Plug | NGK equivalent |
| Spark Plug Gap | 0.5 – 0.6 mm |
Transmission
| Transmission Type | 5-speed constant mesh |
| Clutch | Wet multi-plate |
| Primary Reduction | |
| Final Reduction | |
| Overall Reduction | |
Dimensions
| Overall Length | |
| Overall Width | |
| Overall Height | |
| Wheelbase | 1470 mm |
| Ground Clearance | |
| Fuel Tank Capacity | 9–11 L |
Chassis
| Frame Type | Steel, single shock (Pro-Lever) |
| Caster Angle | |
| Trail | |
| Front Suspension | Marzocchi telescopic forks |
| Rear Suspension | Pro-Lever single shock (WP/Fox) |
| Front Suspension Travel | 300 mm |
| Rear Suspension Travel | 320 mm |
Brakes & Wheels
| Front Tire | 3.00 – 21 |
| Rear Tire | 4.00 – 18 |
| Front Brake | Drum |
| Rear Brake | Drum |
250cc Other Specs
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