Leon Bollee 1897

Leon Bollee 1897. Yesterdays motorcycles. Netherlands. ca 1897 Leon Bollee Tricar-Tricycle . Single cylinder ca 800cc 4-stroke engine Automatic/atmospheric inlet valve Hot tube ignition, so there is no spark plug used for the ignition. Instead of a spark plug ( not yet invented/perfected in 1897 ) there is a hollow tube outside the cylinder head as an extension of the combustion chamber. An external gasoline burner heats up the tube to red hot and this provides the heat/spark to ignite th