The Italian word, Seiemmezzo translates to six and a half, which indicates the displacement of this motorcycle. The 649cc, parallel-twin, liquid-cooled engine makes a maximum output of 54bhp at 8,250rpm and a peak torque of 54Nm at 7,000rpm. This motor is linked to a six-speed gearbox that, surprisingly, misses an assist clutch mechanism. It does, however, get a slipper mechanism. The engine feels comfortable anywhere above 2,500rpm and it gives a commendable output in the mid and higher revs. The step up in acceleration post 6,500rpm is praiseworthy too. In the sixth gear, the 100kmph mark comes around 4,500rpm while 120kmph is hit at 5,500rpm – which is a sweet spot to cruise on the highway as the engine is at the cusp of its power band and can be used for quick overtakes.
Now, despite the high-revving performance of the engine, the vibrations are well managed, unless you are above 7,000rpm. That’s where you can feel a buzz from the footpegs. Otherwise, we didn’t find anything to complain about.
The engine performance is complemented by the suspension setup and the braking hardware. The upside-down front forks and rear mono-shock are tuned for spirited riding and thus set on the firmer side. The front forks are adjustable for compression and preload while the rear mono-shock can be tuned for preload only. In the stock state of tuning that we received from the manufacturer, the motorcycle glided over minor undulations efficiently. The bigger bumps and potholes, however, sent a harsh bump to the rider. One thing that you must know is that the front forks tend to completely extend out, hitting the stopper when tackling speed breakers at a relatively faster pace.
The anchoring hardware on the Seiemmezzo 6½ Retro Street includes twin 298mm discs at the front and a single 255mm rotor at the back, both grabbed by Brembo-sourced calipers. The setup packs an ample amount of bite and feels progressive, thus giving you the confidence to brake late into a corner. The ABS, however, feels intrusive and the system kicks in way too soon, and there is no option to adjust the feedback. Then, the Pirelli-sourced Angel GT tyres deliver promising feedback and sufficient grip for spirited riding, and the Seiemmezzo 6½ Retro Street feels remarkably fun around twisting roads.