Shake well. Remove air cleaner with engine at operating temperature, ignition off, spray foam onto carburettor throat. Allow to stand 5-10 minutes. Start motor, run engine fast enough to prevent stalling while spraying same volume foam into carburettor throat. Stop engine, allow to stand for 5-10 minutes. Restart engine, blow out deposits from engine. Adjust settings or air bleed & idle screw.
For fuel injection engines, spray Raceline Compression stabiliser directly onto induction manifold through a vacuum pipe nearest centre of the manifold. Run engine at high RPM to prevent stalling. Leave to stand for 20 minutes. Start run to clear deposits. Repeat every 10 000km