This open CDI unit is specially designed for the Honda Zoomer / Ruckus scooters in the North American market. Plug-and-Play: no annoying wiring or soldering required. The ignition box raises the engines rev restriction from a max. of 8,000 to the full 12,000 rpm. For best possible performance and revs, Kitaco recommends changing the variator weights to 6g. Attention: Only for carburetted models!