Racing Bee Racing Booster for Yamaha 135LC

This item is used to boost ignition power from the coil to deliver it to the spark plug. The more spark power that you get, in theory, the better the combustion will be in the combustion chamber.
Anyway, in some cases, the are reported problem that the piston has been leaked in the middle due to very powerful spark from the spark plug.
Use with caution.

Racing Bee Racing Booster for Yamaha 135LC

Info Sources : http://motomalaya.blogspot.com/2009/12/racing-bee-racing-booster-for-yamaha.html