Specifications and workshop reference information for the 1987 Honda CR125, 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.
| Engine Type | Liquid-cooled 2-stroke single-cylinder |
| Displacement | 124 cc |
| Bore × Stroke | 54.0 × 54.5 mm |
| Compression Ratio | 8.5:1 (approx) |
| Maximum Power | ~34 hp |
| Maximum Torque | ~22 Nm |
| Carburetor | Keihin PWK ~34 mm |
| Lubrication | Premix |
| Fuel Mix Ratio | 32:1 |
| Ignition | CDI |
| Spark Plug | NGK BR9EG |
| Spark Plug Gap | 0.6–0.7 mm |
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