Average Reviews:
(More customer reviews)I bought this device thinking it would be useful. It wasn't even that; in fact it even damaged the spark plug threads in the cylinder head of my motorcycle.
The Colortune was screwed in by hand fully and then tightened according to instructions. When I tried to remove the Colortune, it was seized in place. I waited for things to cool and then carefully unscrewed the Colortune using a spray lubricant to help. A few of the internal spark plug threads had been damaged due to galling.
I measured the major diameter of the Colortune at work (I work in a lab) and it did not meet spark plug dimensioning, either SAE or British in the Machinery Handbook. In fact, the major diameter of the Colortune threads was 0.008 inches larger than a Bosch or NGK spark plug. 0.008 inches is substantial!!!
I did get a refund, but no compensation from Gunson for damages. Their response in a letter to me proved their arrogance. I should have known better; look where it is made.
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