| Year | 1958 |
| Bore x Stroke | 45.5 x 52 mm |
| Capacity | 84.6 cc / 5.2 cu in |
| Colours | 85T: Red and white, red frame 85S: Silver and blue, blue frame Bronco: Bronze and maroon |
| Compression Ratio | 7.5:1 |
| Cooling System | Air cooled |
| Dry Weight | 80 kg / 176 lbs |
| Engine | Four stroke, single cylinder, OHV, pushrod |
| Final Drive | Chain |
| Frame | Pressed steel |
| Front Brakes | Drum, 116 x 25 mm |
| Front Suspension | Telescopic fork |
| Front Tyre | 2.50 x 17 |
| Ignition | 6V, 28 W generator |
| Induction | Dell'Orto ME15BS carburetor |
| Max Power | 85T & Bronco: 3.7 kW / 5 hp 85S: 4.1 kW / 5.5 hp |
| Rear Brakes | Drum, 116 x 25 mm |
| Rear Suspension | Swingarm, dual shocks |
| Rear Tyre | 2.50 x 17 |
| Starting | Kick |
| Top Speed | 85T & Bronco: 70 km/h / 43 mph 85S: 76 km/h / 47 mph |
| Transmission | 85T & Bronco: 3-Speed 85S: 4-Speed |
