Ariel Owners Motorcycle Club

Just to back up the feature in this months Cheval on bias washers, I bought one recently ( after a suggestion by Tony Cooper ) as a last resort to cure a richer mixture on one pot on a Monobloc’d Triumph twin. Initially I suspected a worn bore as there were a couple of scratches on it, but firstly new rings and a light hone, followed by a rebore and new pistons didn’t cure the problem ( the head had already been overhauled ) .
I pessimistically ordered a bias gasket from Roger at Cake Street Classics, and hey-presto, equal plug colour on both pots . Just wish I’d bought it before the rebore !