It is India's first four-stroke motorcycle to have a Radical Aluminium Combustion Engine (R.A.C.E.), which is fitted vertically on the tubular chassis. There is less wear and tear on the engine since the engine block and the piston are made up of aluminium alloys. Furthermore, the clearance between the piston and the cyclinder liner can be kept very close, thus avoiding damage both to the piston and the cylinder liner. The company offers a 12-month free maintenance, which covers all costs of maintenance (except tyre, tube and spark plug). The 4S can cover a distance of 650 kph and more without a refill.