Nuclear ASM Type6 .21 on-road engine
Japanese brand Nuclear have released the Type6 version of their ASM 3.5cc nitro onroad engine. An evolution of their Type5 motor, all the changes on this new motor are internal, such as the surface treatment of the piston to further reduce friction and improve the durability. The sleeve, conrod, piston connecting pin and backplate have also received this coating, which together with the newly shaped 9mm venturi, also helps to improve throttle response. The engine comes with the C1 combustion camber insert and will be available in a 9 or 7 port version.
Source: Nuclear [nuclear.ne.jp]