58 IRS LC – liquid-cooled single-cylinder engine

Design and Features

The engine cylinder is a casted from aluminum alloy with a galvanically applied hard working surface using nikasil technology. The piston is casted from an alloy with a high silicon content and has a groove for one piston ring made of special hardened cast iron. A special molybdenum sulfite coating is applied to the piston surface to reduce friction and extend engine life-time. The crankshaft made of alloyed steel is supported by two ball bearings, the connecting rod made of high-strength duralumin has both eyes mounted on needle roller bearings.

The engine is characterized above all by a very high power in the entire speed range and we can compare its performance with engines with a capacity of 70 - 80 cc. Of course, it is very easy to start in both cold and warm condition, excellent reliability and very low vibrations. Its weight stands at today's minimum of this range. The overall positive impression is enhanced by the modern design with blue anodized parts and perfect workmanship exclusively on CNC machines.

The preparation of the mixture is controlled by a Walbro carburettor with a choke and a diaphragm pump. The ignition is battery powered with  electronics and a microprocessor controlled ignition timing and with safety functions.