Suzuki GN 125 (1988-89) vs Suzuki RG 125 Gamma (1988-91) vs Yamaha TZR 125 (1987-88) vs Suzuki Boulevard C90T B.O.S.S (2015-16)
Comparison technical specifications
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| Make: | Suzuki | Suzuki | Yamaha | Suzuki |
| Model: | GN 125 | RG 125 Gamma | TZR 125 | Boulevard C90T B.O.S.S |
| Years: | 1988-89 | 1988-91 | 1987-88 | 2015-16 |
| Engine: | Four stroke, single cylinder, SOHC, 2 valve per cylinder. | Two stroke, single cylinder, crankcase reed valve | Two stroke, single cylinder, read valve, | Four stroke, 54° V-twin, SOHC, 3 valves per cylinder |
| Capacity: | 124 cc / 7.6 cu in | 124 cc / 7.6 cu-in | 124 cc / 7.6 cu-in | 1462 cc / 89.2 cu-in |
| Bore x Stroke: | 57.0 x 48.8 mm | 54 x 54 mm | 56.4 x 50 mm | 96 x 101 mm |
| Compression Ratio: | 9.5:1 | 7.4:1 | 5.9:1 | 9.5:1 |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Induction: | Carburetor | 28mm Mikuni carburetor | Mikuni VM26SS carburetor | Fuel injected |
| Ignition: | Digital CDI | CDI | CDI | Digital transistorized |
| Max Power: | 9.7 kW / 13 hp @ 9500 rpm | 18.4 kW / 25 hp @ 9.500 rpm | 26.hp / 19.3 kW @ 10200 rpm | 49.2 kW / 66 hp @ 4800 rpm |
| Max Torque: | 10 Nm / 1.0 kgf-m / 7.4 lb-ft @ 5600 rpm | 19.1 Nm / 1,95 kg-m / 14.1 lb-ft @ 8500 rpm. | 1.8 kgf-m / 13 lb-ft @ 10000 rpm | 115 Nm /11.7 kgf-m / 84.8 ft-lbs @ 2800 rpm |
| Transmission: | 5 Speed | 6 Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Shaft |
| Front Suspension: | 37 mm Hydraulic telescopic forks | 30 mm Telescopic forks | Telescopic fork | Telescopic, coil springs, oil damped |
| Rear Suspension: | Dual shocks | Single shock linkage | Monocross | Link type, coil spring, oil damped |
| Front Brakes: | Single disc, 220 mm, single piston caliper | Single 230 mm disc | Single disc | Dual 300 mm discs, 4 piston caliper |
| Rear Brakes: | Drum, 130 mm | 130 mm Drum | Drum | Single 180 mm disc, 2 piston caliper |
| Front Tyre: | 90/90-18 | 80/100 S16 | 90/90 16 | 130/80-17M/C 65H, tubeless |
| Fuel Capacity: | 10.3 Litres / 2.7 US gal / 2.3 Imp gal | 12 Litres / 3.2 US gal / 2.6 Imp gal | 12 Litres / 3.1 US gal | 18 Litres / 4.8 US gal |