Ducati 750 GT servicing
1971 to 1974 · 748cc bevel-drive 90° V-twin, valve springs · Greenwich, London
Ray Petty Meccanica services, repairs and restores the Ducati 750 GT (1971 to 1974), the round-case bike that began Ducati's V-twin line, at its independent Ducati workshop in Greenwich, London. The GT uses valve springs rather than Desmo, and RPM keeps its bevel drive, twin carburettors and points ignition working as they should.
About the 750 GT
Fabio Taglioni designed the 750 GT in 1970 and it was in production by June 1971. Its 748cc (80 x 74.4mm) 90° twin was essentially two 350 singles on a common crankcase, with bevel-driven overhead cams, a built-up crankshaft on ball bearings and side-by-side connecting rods on one crankpin. The engine hangs as a stressed member beneath a Colin Seeley-inspired spine frame. Early GTs had silver frames, fibreglass tanks, a leading-axle Marzocchi fork and a Lockheed caliper on a single front disc. Later bikes gained Veglia instruments, centre-axle forks, a Brembo caliper and a steel tank. About 4,100 were built before the 860 GT replaced it in 1974, plus a batch of 40 built to order in 1978.
Servicing your 750 GT
The GT closes its valves with coil springs, not Desmo rockers, so valve work is simpler than on the 750SS. Each head's camshaft is driven by its own bevel shaft, and the bevel gears and their shims must be set up correctly whenever an engine is rebuilt, which is why the factory needed up to eight hours to assemble one. Early bikes ran Spanish-made 30mm Amal Concentric carburettors, replaced by 30mm Dell'Orto pumpers by 1972, and either pair needs balancing. Ignition is by contact breaker points driven from a gear between the cylinders, the clutch is a wet multiplate, and nearly all GTs are kickstart only. Thinking of buying one? RPM will look it over first, so you know what you are taking on.
Book your 750 GT in
Tell us what it needs, or how long it's been off the road, and we'll take it from there.
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Saturday: 10am to 5pm
Sunday and Monday: closed