Reliant Rebel 700 1967 Workshop Manual page 77

Erratic slow running or stalling on deceleration
Make certain that the slow running jet is clean and tat the feed hole to
the channel into which the jet screws is clear. It is also essential to
ensure that the slow running air bleed into the intake is clear.
Check that the slow running outlet hole and the progression hole or
holes in the throttle barrel are clear and not choked with carbon,
restricting the orifice.
Remove the volume control screw and check that the tapered end is
in good condition. If the taper shows any wear the screw must be
renewed. Make sure that the tension spring beneath the head of the
screw loads the screw correctly, preventing it vibrating out of
adjustment.
Adjust the throttle control screw and volume control screw so that the
engine idles evenly and acceleration is clean and progressive.
Check that the gasket between the inlet manifold and the carburettor
is sound as an air leak here will seriously affect the way the engine
runs.
Stalling is usually due to the idling speed being too low or the mixture
being set too lean.
Excessive fuel consumption
Poor fuel economy is usually as a consequence of a mechanical defect,
binding brakes and under inflated tyres being the most common
causes. If the cause appears to be carburation, check as follows:
Having checked to ensure that the jets are all correct and all holes and
passages within the carburettor are correct, check that the choke flap
is fully open with the choke knob fully in.
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