My Kep's 21 2006 rigger with Sirio S21 engine - own design cooling head & flywheel design. This flywheel is made of SS material - I have aluminium ones also. Its really short over the crank as I use the std SG type car crank with the 5 mm part cut off. Really short starting belt also on special order - otherwise its really, really hard to get the normal "short" ones down...
