1973 Honda CR125
Specifications and workshop reference information for the 1973 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 | Air-cooled 2-stroke single-cylinder piston-port |
| Displacement | 123 cc |
| Bore × Stroke | 56.0 mm × 50.0 mm |
| Compression Ratio | 8.0:1 |
| Maximum Power | Approx. 22 hp @ 9,000 rpm |
| Maximum Torque | |
| Carburetor | 28 mm Keihin |
| Lubrication | Pre-mix |
| Fuel Mix Ratio | 20:1 |
| Ignition | Flywheel magneto |
| Spark Plug | NGK B9ES |
| Spark Plug Gap | 0.6 - 0.7 mm |
Transmission
| Transmission Type | 5-speed close-ratio |
| Clutch | Wet multi-plate |
| Primary Reduction | 3.476 |
| Final Reduction | Chain drive |
| Overall Reduction | |
Dimensions
| Overall Length | 82.7 in |
| Overall Width | 34.6 in |
| Overall Height | 44.1 in |
| Wheelbase | 54.7 in |
| Ground Clearance | 11.8 in |
| Fuel Tank Capacity | 1.7 gal |
Chassis
| Frame Type | Semi-double cradle |
| Caster Angle | |
| Trail | |
| Front Suspension | Telescopic forks |
| Rear Suspension | Swingarm with dual shock absorbers |
| Front Suspension Travel | 7.9 in |
| Rear Suspension Travel | 3.9 in |
Brakes & Wheels
| Front Tire | 2.75 × 21 |
| Rear Tire | 3.25 × 18 |
| Front Brake | Internal expanding shoe drum |
| Rear Brake | Internal expanding shoe drum |
125cc Other Specs
Community
VMX Owners Forum
Discuss vintage motocross bikes, restorations, tuning and riding.
