Adler Junior M100 (1955) vs Vespa PK 50 N Speedmatic (1992-96) vs Aprilia Scarabeo 100 (2007) vs Cagiva Elefant 900AC CAT (1993) vs Triumph Tiger Sport 850 (2025) vs Ducati 900 Monster / Dark (2001-02)
Comparison technical specifications
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| Make: | Adler | Vespa | Aprilia | Cagiva | Triumph | Ducati |
| Model: | Junior M100 | PK 50 N Speedmatic | Scarabeo 100 | Elefant 900AC CAT | Tiger Sport 850 | 900 Monster / Dark |
| Years: | 1955 | 1992-96 | 2007 | 1993 | 2025 | 2001-02 |
| Engine: | 1 cylinder, 2 stroke | Two stroke, single cylinder | Horisontal, single cylinder, four stroke, OHC | Four stroke, 90° “L” twin cylinder, SOHC, desmodromic 2 valve per cylinder | Four stroke, transverse three cylinder, DOHC, 4 valve per cylinder. | Four stroke, 90°“L” twin cylinder, SOHC desmodromic 2 valve per cylinder. |
| Capacity: | 98 cc / 6 cub in. | 49.8 cc / 3.0 cub in | 96.2 cc / 5.9 cu in | 904 cc / 55.1 cu-in | 798 cc / 48.7 cu in | 904 cc / 55.2 cu in |
| Bore x Stroke: | 50 x 50 mm | 38.4 x 43 mm | 50 x 49 mm | 92 x 68 mm | 78 x 55.7 | 92 x 68 mm |
| Clutch: | Multi plate, wet, cable operated | Oil bath, multi plate | Automatic, centrifugal | Dry Multi-disc | Wet, multi-plate, slip & assist | Dry multiplate |
| Starting: | Electric | Kick start | Electric and kick | Electric | Electric | Electric |
| Ignition: | Magneto | Flywheel magneto | Electronic | Marelli electronic inductive discharge | Digital CDI | Kokusan electronic inductive discharge |
| Compression Ratio: | 1: 5.75 | 9.1:1 | 10.5:1 | 9.2:1 | 13.2:1 | 9.2:1 |
| Transmission: | 3 Speed gearbox, foot changes | 4 Speed, grip shift | Air cooled automatic variator | 6 Speed | 6 Speed, Triumph Shift Assist | 6 Speed |
| Final Drive: | Chain | Direct drive | V-belt | Chain | X-ring chain | Chain |
| Frame: | Double cradle steel frame | Pressed sheet steel with streamlined monocoque structure | Single spar with double cradle, high strength steel | Double steel tubular cradle | Tubular steel perimeter frame | Tubular steel trellis |
| Front suspension: | Leading link | Trailing arm, coil spring, damper | Hydraulic fork | 45mm Showa upside down telescopic forks | Showa 41mm, upside-down separate function cartridge forks, adjustable compression and rebound damping | Showa, inverted type, adjustable, 43 mm stanchions |
| Rear suspension: | Twon shock, plunger | Coil spring, damper | Hydraulic monoshock | Rising rate box, monoshock adjustable for preload | Showa monoshock RSU with adjustable rebound damping and remote hydraulic preload adjustment. | Öhlins progressive linkage with adjustable monoshock |
| Fuel Capacity: | 7 L / 1.8 US gal | 6.2 L / 1.6 US gal | 8 L / 2.1 US gal | 22 Litres / 5.8 US gal | 18.6 Litres / 4.9 US gal | 16 L / 4.2 US gal / 3.5 Imp gal |