How managing and stabilising fuels protect motorcycle engines and carburettors

Most fuels for pre 1990s engines incorporated a lead additive since GM invented it in 1921 to reduce the internal combustion engines’ arch enemy – knock (or ping) – and to lubricate the valve seats and guides. Lead was banned for use in fuels in 2001 due to environmental health reasons. For better or worse, most of the petrol you buy at stations around the country since that ban on lead has been “oxygenated” with any number of differing additives since a series of fuel amendments and eventual ban on lead were made by the Department of the Environment and Energy in the late 1990s – 2000s. The idea is to help the gasoline burn more cleanly and completely and thus deliver better economy and cut down on harmful emissions with the “pinging”, previously controlled by lead, now governed by knock sensors feeding back to the EFI ECU. So what about the poor old carburettor … TBSS?

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