Colortune spark plug for bike - 12mm combustion tester

The COLORTUNE is a very clever device for seeing the combustion flame colour of the air-fuel mixture in an engine. It is very like a spark plug with a thick glass window and ignition electrodes that screw into position in the place of the original spark plug.

Specially designed for motorbike engines, this low volume Colortune maintains the compression ratio of the engine to ensure better combustion of the mixture.

Suitable for 12mm spark plugs