Junak B20 (1960-65) vs Suzuki GSX 400F Katana (1981)
Comparison technical specifications
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| Make: | Junak | Suzuki |
| Model: | B20 | GSX 400F Katana |
| Years: | 1960-65 | 1981 |
| Engine: | Four stroke, single cylinder, OHV | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 349 cc / 21.3 cub. in. | 398 cc / 24.3 cu in |
| Bore x Stroke: | 75 x 79 mm | 53 x 45.2 mm |
| Compression Ratio: | 7.0:1 | 10.2:1 |
| Ignition: | Magneto | Fully transistorised |
| Battery: | 14 Ah, 6V | 12V, 12Ah |
| Starting: | Kick-start | Electric |
| Clutch: | Multi-plate clutch with cork inserts working in an oil bath | Wet, multiplate |
| Max Power: | 14 kW / 19 hp @ 6000 rpm | 30.8 kW / 41.3 hp @ 10500 rpm |
| Max Torque: | 27.5 Nm / 2.8 kgf-m / 20.3 ft-lb @3800 rpm | 30.2 Nm / 3.1 kgf-m / 22.3 lb-ft @ 8500 rpm |
| Transmission: | Four-speed constant-mesh | 6 Speed |
| Final Drive: | Chain | Chain, DAIDO DID50UB, 104 links |
| Gear ratios: | 1st 3.04 / 2nd 1.97 / 3rd 1.29 / 4th 1.00:1 | 1st 3.166 (38/12) / 2nd 2.125 (34/16) / 3rd 1.631 (31/19) / 4th 1.333 (28/21) / 5th 1.173 (27/23) / 6th 1.083 (26/24) |
| Front Suspension: | Fork with coil springs telescopic shock absorbers | Telescopic fork, oil dampened |
| Rear Suspension: | Independent rear wheel suspension on single wishbone , cooperating with 7- leaf spring positioned transversely; | Swingarm, dual shocks, oil dampened, spring 5-way adjustable |
| Front Brakes: | Full hub width, of expander shoe type, hand operated | 2 x Discs |
| Rear Brakes: | Full hub width, of expander shoe type, foot operated | Single disc |
| Front Tyre: | 19 in | 3.25-S19 4PR |
| Rear Tyre: | 12 in | 3.75-S18 4PR |
| Trail: | 72 mm / 2.8 in | 100 mm / 3.9 in |
| Dimensions: | Length: 3055 mm / 120.3 in Width: 1420 mm / 55.9 in | Length: 2105 mm / 82.9 in Width: 750 mm / 29.5 in Height: 1135 mm / 44.7 in |
| Seat Height: | 755 mm / 29.7 in | 780 mm / 30.7 in |
| Ground Clearance: | 170 mm / 6.7 in | 165 mm / 6.5 in |
| Wet Weight: | 320 kg / 705.5 lbs | 197 kg / 434 lbs |
| Fuel Capacity: | 17 l / 3.9 US gal | 15 Litres / 4.0 US gal / 3.3 Imp gal |
| Top Speed: | 75 km/h / 46.6 mph | 170 km/h / 106 mph |