The Colortune has a clear spark plug that lets you look into the combustion chamber while the engine is firing. The colour of the combustion flame tells you if the mixture is correct. With the carburettor mixture screw you can then adjust the flame colour to get the correct mixture.
There are 3 sizes, 10mm, 12mm, and 14mm and a kit with all 3 plugs called the "A" Colortune kit.
The Colortune has a clear spark plug that lets you look into the combustion chamber while the engine is firing. The colour of the combustion flame tells you if the mixture is correct.
With the carburettor mixture screw you can then adjust the flame colour to get the correct mixture.
Comes complete with periscope for recessed plugs.
Take the guesswork out of engine tuning with the Colortune.
The world famous glass topped spark plug that gives you a window into the combustion chamber so you can see the flame.
Why is this important? The flame's colour tells you the richness of the air/fuel ratio. A yellow flame means a rich mixture and a blueish white flame a weaker mixture. Usually a bunsen blue flame is spot on.
The Colortune is so simple that anyone can use it. It works on the principle that certain fuel mixtures burn with a certain color.
The Colortune will work on both motorcycles and cars with carburettors. Just adjust the mixture screw to get the correct flame colour.
Also works on injection systems that have a mixture adjuster. Mainly older injection systems.
The Colortune comes in 3 spark plug thread sizes.
10mm, 12mm and 14mm. (Most cars are 14mm)
What size are your spark plugs?
Check the size on a spark plug website here.
For NGK the first letter on the spark plug number indicates the size.
When ordering select the kit you want, the 10mm, 12mm or 14mm or 3-plug "A" kit.
Have more than one motorcycle and need different plugs? Use the Colortune "A" kit. This best value kit is the standard 14mm Colortune with spare 12mm and 10mm plugs. This is a complete 14mm kit with loose 12mm and 10mm plugs. It will cover virtually the entire motorcycle range and let you do most any motorcycle.
Motorcycle kit with two extra plugs (3 plugs in total 10mm, 12mm and 14mm) Colortune "A" kit: £69
(Extra plugs normally £20 each. Separate price would be £77)