1987 Honda CR125 Specifications and Specs
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.
General Specifications
| Engine Type | Single-cylinder, two-stroke, liquid-cooled, crankcase reed valve |
| Displacement | 124.8 cc |
| Bore × Stroke | 54.0 × 54.5 mm |
| Compression Ratio | 8.8:1 |
| Maximum Power | 35.5 hp @ 11,000 rpm |
| Maximum Torque | 22.9 Nm @ 10,500 rpm |
| Carburetor | Keihin PJ08 | Replacement Options |
| Lubrication | Premix |
| Fuel Mix Ratio | 32:1 | Premix Calculator |
| Ignition | Electronic CDI |
| Spark Plug | NGK B9EG |
| Spark Plug Gap | 0.6–0.7 mm |
Transmission
| Transmission Type | 6-speed constant mesh |
| Clutch | Wet multi-plate |
| Primary Reduction | 3.722 |
| Final Reduction | 13T / 51T |
Dimensions
| Overall Length | 2,135 mm |
| Overall Width | 825 mm |
| Overall Height | 1,230 mm |
| Wheelbase | 1,450 mm |
| Ground Clearance | 355 mm |
| Seat Height | 925 mm |
| Fuel Tank Capacity | 6.5 L |
| Dry Weight | 87.5 kg |
| Bearing Sizes |
Bearing Finder |
Chassis
| Frame Type | Semi-double cradle steel frame |
| Caster Angle | 26° |
| Trail | 105 mm |
| Front Suspension | Showa telescopic forks | Fork Oil Levels |
| Rear Suspension | Pro-Link single shock | Rear Suspension Setup |
| Front Suspension Travel | 300 mm |
| Rear Suspension Travel | 305 mm |
Brakes & Wheels
Service Data
| Transmission Oil Capacity | 585 cc |
| Spark Plug | NGK B9EG |
| Spark Plug Gap | 0.6–0.7 mm |
| Chain Type | 520 |
| Standard Sprockets | 13T / 51T |
| Starting System | Primary kick |
125cc Other Specs
Community
VMX Owners Forum
Discuss vintage motocross bikes, restorations, tuning and riding.
