Took the bike for a run last night and the bulbs lasted fine and no misfire - bonzer!
It feels like it is running rich though: a combination of a lack of grunt and a poor tickover that needs "tickling" of the throttle to keep it going at times.
I removed the air-filter to inspect thinking that if it
was blocked it would be like having the choke "on" with all the
obvious consequences.
The active filtering area is outwards from the central
rivet to about 2" diameter (up to the 2nd raised ring, from the centre).
There is a circular piece of black cloth fitted between the black mesh and rear
metal plate. The filtered air is sucked
through a circular rubber tube, of the same diameter, which then feeds the carburettor
input. The area outside of the 2nd ring
is non-effective as it butts up against the inside of the battery compartment.
The reverse metal side of the filter shows a darkened
area showing where the air has passed through in the past. Holding the filter up to the light seems to
suggest things are not that well with the airflow. I am not suggesting this is the entire
problem but it should help in weakening the mixture.
I'll try cleaning the filter in fuel and see what
happens.
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