| MODEL | DERBI MULHACÉN 659 2005 - 2011 |
| Year | 2005 - 2011 |
| Engine Type | Four-stroke, single cylinder, SOHC, 4 valves |
| Displacement / Capacity | 659.7 cc / 40.2 cu in |
| Bore X Stroke | 100 x 84 mm |
| Compression Ratio | 10.0:1 |
| Cooling System | Liquid cooled |
| Max Power | 36.2 kW / 48.6 hp @ 6000 rpm |
| Max Torque | 55.6 Nm / 41 lb-ft @ 5500 rpm |
| Ignition | CDI |
| Induction | Fuel injection, 44 mm throttle body |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Oil pump |
| Gear Box | 5-speed |
| Clutch | Multi-plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Aluminium trellis |
| Front Suspension | 43 mm upside-down fork, 120 mm wheel travel |
| Rear Suspension | Progressive lateral link, 110 mm wheel travel |
| Front Brakes | Single 320 mm disc, 4-piston caliper |
| Rear Brakes | Single 240 mm disc, 1-piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2120 mm / 83.4 in |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 810 mm / 31.8 in |
| Wheelbase | 1386 mm / 54.5 in |
| Ground Clearance | — |
| Dry Weight | 160 kg / 352.4 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 120/80-18 |
| Rear Tyre | 150/70-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 13 Litres / 3.4 US gal |
| Fuel Consumption | 23.6 km/l |
| Top Speed | 168 km/h |
The Mulhacén 659 is a retro-styled naked roadster from Derbi, built around a single-cylinder engine made in Italy by Minarelli for Yamaha. It was the biggest-capacity motorcycle Derbi had produced, with fuel injection, a trellis frame and a rising-rate rear linkage. Testers praised its handling on twisty roads over its modest power.
