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Published on Jun 11, 2013
Gilbert Gunson could have used a Colortune back in the day! The famous Gunson Colortune spark plug is the ideal and easy way to tune the fuel mixture on your classic motorcycle and many moderns where the fuel mixture is adjustable. Gunson part numbers G4171 and G4172. Get more details of the full Colortune range at www.gunson.co.uk