1971 Vespa GTR - October 2019 Window Bike
This 1971 Vespa 125 GTR is a very clean, unrestored example. The Vespa GTR is most closely related to the Sprint Veloce, with the primary difference between the two being the Sprint Veloce's larger 150cc engine. Performance is similar between the two as well; the GTR's 125cc 2-stroke produces roughly 6.5 horsepower in factory trim, and tops out around 90 km/h. Both use a four speed manual, direct-drive transmission, front and rear drum brakes, and 10” wheels.
The Vespa GTR saw sales in reasonable numbers in European markets where 125cc was the cutoff for licensing restrictions. However it wasn't sold in North America, meaning that they are comparatively rare here, especially in original condition, with matching engine and frame.
The Vespa has been brought up to as new mechanical condition, along with several minor modifications to improve usability, and to tailor the cosmetics to subtly mimic some of the earlier 1960s models.
All control cables have been switched out for PTFE lined cables, which provide longer life, better feel and do not require lubrication. The tires have been changed to a more modern Michelin S1, which offers better handling, and front and rear suspension has been stiffened up with new OEM dampers and heavier rate springs.
Engine performance has been stepped up with some simple bolt on modifications, allowing the Vespa to be easily returned to its factory state. The original Dellorto SI20/17 carburetor and air filter have been replaced with a larger Dellorto SI20/20d with modified air filter. The restrictive exhaust has been replaced with an 'expansion-box' style exhaust which keeps the original shape, but gives performance more in-line with an expansion pipe.
Cosmetically, the bike is largely original. Bodywork, paint, and trim are all unchanged from the day it left the factory. The control levers were swapped to the earlier 'stiletto' style, seats were swapped from the original bench seat to a single-saddle, with a rear rack (left unpainted, as it is a NOS part in original primer), and a pillion pad for a passenger. The original headlight was tinted yellow with a removable vinyl film as this was a popular period modification. The legshield mounted spare tire holder was removed to make the bike more comfortable for a taller rider.