It is important to check the carburettion after a conversion because too much fuel will cause "petrol wash", literally too much petrol in the mix washing the lubrication away from the piston and barrels, from the valves and guides. Obviously, this will cause premature wear of the engine.

For owners considering converting their vehicles to LPG or CNG, extra consideration is due because these gases wear both inlet and exhaust seats very rapidly. Both inlet and exhaust seats need replaced and Serdi supply their "Star" range of seats for this purpose machinable on the new Serdi 5.

Further research in this area will no doubt uncover new and better solutions. Lead memory and work hardening may be a factor in old engines, so try your engine on unleaded and see what happens.