Hasi Tuned, the engine tuning brand set-up by top international Swiss onroad racer Silvio Hächler, has released two new .21 Onroad engines. Available in 7 or 9 port variations, the engines are totally new with the key difference over the previous version being new high dissipation and low density aluminium cooling head, to combine functionality and lightweight. Also new is the crankshaft, with revised timing and balancing. There is also new piston and liner with high compression piston. The design of the ports has been revised to combine performance and reliability. A new reinforced conrod completes the updates. Each engine will have its own dedicated sleeve, which will be perfectly honed inside the crankcase, avoiding dangerous vibrations. Like every Hasi engine, they are numbered one by one and accompanied by a certificate of guarantee and authenticity and the useful engine book.