This thought-to-be lone example of a complete Advance Motorcycle can be found at the National Motorcycle Museum, Solihull, Birmingham, UK. The Advance Motor Manufacturing Company was located in Northampton.
According to the NMM’s website, ‘the 360cc engine has an automatic inlet valve above a mechanical exhaust valve.’ The rear was belt-driven from the crankshaft, & there were pedals with a free-wheel hub, providing for a less-than-bone-jarring bump-&-run start (pedal-furiously-&-glide?), & for a good aerobic workout on hills. As the engine only produced 2 3/4 horsepower, you could bet on some exercise in hilly country. More from NMM ~ ‘The handlebar grips, pedal blocks & the box for the ignition accumulator are made of wood.’
Advance also produced tricars & forecars using larger single-cylinder & V-twins. Their twins were doubled to create a V-four for use in airplanes.
Advance ceased vehicle production in 1912, to concentrate on component manufacture.
The whole machine can be seen here.