Please note these are adapters for Colortune plugs. They are not Colortune plugs
Adapter to fit on the 14mm Colortune plug kit. There are 10mm and 14mm adapters. They adapt the 14mm plug kit to fit those sizes 10mm plug motorcycles. Only for engines with at least 180cc per cylinder.
12mm adapter no longer available.
Also available 14mm "taper slim" adapter and 14mm "long" adapter.