Mellow and mental

he parallel twin engine is basically all new, with bore and stroke both up on the old to give an extra 100cc. Compression is up too, cams wilder, pistons lighter, and both inlet and exhaust valves 1mm larger. For better low-speed response, the crankshaft now has 20 per cent more rotational mass, with a revised balancer shaft to reduce vibration. Inside the gearbox, the selector mechanism has been redesigned to produce a shorter lever movement