Honda CBX 125F (1991-93) vs Yamaha RD 250 (1976) vs Triumph Bonneville T100 Union Jack (2005) vs Honda CM 125T (1981-)
Comparison technical specifications
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| Make: | Honda | Yamaha | Triumph | Honda |
| Model: | CBX 125F | RD 250 | Bonneville T100 Union Jack | CM 125T |
| Years: | 1991-93 | 1976 | 2005 | 1981- |
| Engine: | Four stroke, single cylinder, DOHC, 4 valve | Two stroke, torque induction, parallel twin | Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder | Four stroke, parallel twin, OHC, 2 valve per cylinder |
| Capacity: | 124 | 247 cc / 15.0 cu-in | 790 cc / 48.2 cu in | 125 |
| Bore x Stroke: | 58 x 47 mm | 54 х 54 mm | 86 x 68 mm | 44.0 x 41 mm |
| Cooling System: | Air cooled | Air cooled | Air-cooled | Air cooled |
| Compression Ratio: | 11.0:1 | 6.7:1 | 9.2:1 | 9.4;1 |
| Induction: | PF40 | 2x Mikuni VM28 SC carburetor | Twin carburetors, with throttle position sensor and electric carburettor heaters | |
| Starting: | Electric | Kick | Electric | |
| Max Power: | 17 hp @ 11500 rpm | 30 hp / 22.3 kW @ 7500 rpm | 45.2 kW / 62 hp @ 7400 rpm | 12 hp @ 7500 rpm |
| Max Torque: | 1.1 kgf-m @ 8500 rpm | 21 lb-ft / 2.9 kgf-m @ 7000 rpm | 60 Nm / 6.1 kgf/m / 44.3ft-lb @ 3500 rpm | |
| Final Drive: | Chain | Chain | Chain | Chain |
| Front Suspension: | Telescopic forks | Telescopic forks | 41mm Telescopic forks | 31mm Forks, centre axle fork |
| Rear Suspension: | Swinging arm | Dual shocks | Chrome spring twin shocks with adjustable preload | Dual shocks adjustable spring preload |
| Front Brakes: | Single disc | Single disc | Single 310 mm disc, 2 piston caliper | Drum |
| Rear Brakes: | Drum | Drum | Single 255 mm disc, 2 piston caliper | Drum |
| Front Tyre: | 80/100- 16 | 3.00S-18-4PR | 100/90 R19 | 3.25-18 |
| Rear Tyre: | 90/90- 18 | 3.50S-18-4PR | 130/80 R17 | 110/90-16 |
| Fuel Capacity: | 12 Litres | 16.5 Liters / 4.2 US gal | 16 Litres / 4.2 US gal / 3.5 Imp gal | 12.5 Litres |