Vespa PX125 (1998-02) vs Vespa 150 GS (1955-61) vs KTM 990 Supermoto R (2009) vs Junak WB1/WB3 (1959-65)
Comparison technical specifications
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| Make: | Vespa | Vespa | KTM | Junak |
| Model: | PX125 | 150 GS | 990 Supermoto R | WB1/WB3 |
| Years: | 1998-02 | 1955-61 | 2009 | 1959-65 |
| Engine: | Single cylinder, 2 stroke | Two stroke, single cylinder | Four stroke, 75°V-twin cylinder, DOHC, 4 valves per cylinder | Four stroke, single cylinder, OHV |
| Capacity: | 123.4 cc 7.5 cub in | 145.5 cc / 8.8 cub in | 999.8 cc / 60.9 cu-in | 349 cc / 21.3 cub. in. |
| Bore x Stroke: | 52.5 x 57 mm | 57 x 57 mm | 101 x 62.4mm | 75 x 79 mm |
| Ignition: | CDI | 6 pole flywheel magneto | Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment | Magneto |
| Starting: | Kick start | Kick start | Electric | Kick-start |
| Clutch: | Wet, multiplate | Wet, multiplate with cork inserts | Wet multi-disc clutch, operated hydraulically | Multi-plate clutch with cork inserts working in an oil bath |
| Max Power: | 8.8 kW / 12 hp @ 6600 rpm | 6.0 kW / 8.2 hp @ 7500 rpm | 114.hp / 83.2 kW) @ 4000 rpm | 14 kW / 19 hp @ 6000 rpm |
| Transmission: | 4 Speed, grip-shift, constant mesh | 4 Speed, grip-shift, constant mesh | 6 Speed | Four-speed constant-mesh |
| Final Drive: | Direct drive | Direct drive | Chain. | Chain |
| Frame: | Pressed sheet steel, streamlined monocoque structure | Pressed sheet steel, streamlined monocoque structure | Tubular space frame made from chrome molybdenum steel, powder-coated | Double, cradle-type, welded throughout of tubing, provided with holders for side car mounting. |
| Front Suspension: | Link arm with coil spring and dual action hydraulic shock absorber | Stub axle with swining hub and variable rate coil spring and double action hydraulic damper | 48mm WP USD adjustable | Fork with coil springs telescopic shock absorbers |
| Rear Suspension: | Engine and transmission serve as swingarm, dual action shock absorber | Swinging bracket for engine and wheel, with variable rate coil spring and co-axial double action hydraulic damper | WP shock, fully adjustable | Independent rear wheel suspension on single wishbone , cooperating with 7- leaf spring positioned transversely; |
| Front Brakes: | 200 mm single disc | Drum, expanding type with cooling ribs | 2x 305mm discs 4 piston calipers | Full hub width, of expander shoe type, hand operated |
| Rear Brakes: | 150 mm expanding drum | Drum, expanding type with cooling ribs | Single 240mm disc 2 piston caliper | Full hub width, of expander shoe type, foot operated |
| Front Tyre: | 110/70-11 | 3.5 x 10" | 120/70 ZR17 | 19 in |
| Rear Tyre: | 120/70-11 | 3.5 x 10" | 180/55 ZR17 | 12 in |
| Fuel Capacity: | 8 L / 2.1 US gal | 12 L / 3.17 US gal | 15 Litres / 3.9 gal | 17 l / 3.9 US gal |
| Top Speed: | 90 km/h / 56 mph | 100 km/h / 62 mph | 229.8 km/h | 85 km/h / 52.8 mph |