The illustrious TT races owe their beginnings to a stodgy and horse-minded English government. Public road competitions were banned in England by an act of Parliament, and its roads were saddled with a 20mph speed limit. The Auto-Cycle Club (later the ACU), believing that ‘racing improves the breed’, wanted a rigorous test of standard as-manufactured machines. The Isle of Man, while a part of Great Britain, was not subject to England’s traffic laws, and local politicos saw the value in hosting such a contest of riders and machinery, with perhaps equal concern for Tourist dollars and Trophies. The wisdom of their decision has been borne out over the last 100 years, as the TT races became the gold standard of motorcycle road racing the world over, and thousand of visitors from all points arrive for a motorcycling holiday every June. True, other countries have held significant and important road races (the Ulster GP, the Nurburgring, etc), but the IoM TT rose to the very pinnacle of all races for the notorious difficulty of the course, with its 37 1/2 miles of narrow roads, stone walls, steep and often fog-shrouded mountain climb, and quaint villages.
The first TT races were held on May 28th 1907, over a 15 3/4-mile course, which did not include the mountain road over Snaefell, as the motorcycles were all single-speed, clutchless, virtually brakeless, and incapable of such a climb, or descent! Two classes, for single- and multi-cylinder machines, had to abide by 90mpg fuel economy (for singles, 75mpg for multis). Famously, Harry Collier, an organizer of the race, on the Matchless single of his own make, and Rem Fowler on a Peugeot-engined Norton (top pic), won their respective classes in just over 4 hours time, at average speeds approx. 42 mph. They each received a 3-foot tall sculptural trophy of Mercury atop a winged wheel, donated by the Marquis de Mouzilly St. Mars, replicas of which have been handed over to brave TT winners for 100 years.
The early races were run over gravel farm tracks at speeds touching 70mph, when punctures, crashes, flaming machines, and livestock encounters were common. Boy Scouts with flags marshaled the course, waving frantically to warn of upcoming dangers. The need for improved machines (and roads) was dramatically emphasized by the death in practice for the 1911 TT of Victor Surridge on a Rudge, outside the Glen Helen Hotel. Thus was born a chorus of objections to the races by the safety brigade, as the treacherous nature of the road course claimed a mounting share of victims.
In 1911, the race moved to the current 37 ½ mile ‘Mountain’ course, to create a greater challenge to the motorcycles, which were becoming faster and more reliable, but still needed development in braking, gearing, and handling. In that year Indian ‘motocycles’ had all these things, using all-chain drive with a clutch and two-speed gearbox, and an effective drum brake on the rear wheel instead of the usual bicycle-type stirrup. Their reward was a sweep of the Senior races, which lit a fire under British and European manufacturers to rapidly modernize their designs. Indians did well at the TT for another 12 years, with their last podium placement in 1923, as Freddie Dixon, the legendary racer-tuner, took 3rd place (pic 2).
By the 1920’s, every competing manufacturer had developed recognizedly modern designs, with brakes on both wheels, suspension (at least up front), clutches, and multiple gears. More entries from Europe began to appear (Peugeot, FN, Bianchi, Moto Guzzi, etc), the road surface had improved, and by 1922 the course was almost fully paved (!); race averages crept up into the 70mph range. The great variety of engine configurations in competition (side-valves, inlet-over-exhaust valves, overhead valves, overhead cams, and two-strokes) made for a fascinating study in the possibilities available to the motorcycle designer. The keenness of competition was reflected in the sheer number of different TT makes; AJS, Levis, New Imperial, Sunbeam, Rudge, Rex-Acme, Velocette, Douglas, DOT, Cotton, Scott, and HRD all won top honors.
By the 1930’s all winners of the Senior (500cc) and Junior (350cc) TT’s had camshafts on top of their engines, and lap records touched 90mph. Only in the Lightweight (250cc) class was mechanical variety maintained, with ohv, ohc, and two-stroke machines nudging their way to the podium. Race machinery had strayed from the original intention of ‘same as you can buy’ machines, as European uber-bikes (Gilera, Moto Guzzi, NSU) with multiple cylinders and superchargers began menacing the track. Still, Norton, with its 500cc Model 30 (‘Manx’), and Velocette’s KTT (350cc - pic 3)
began a long string of success on the Island, which would last until the 1960’s. Race watchers were used to British wins in all but the lightweight classes had regularly broken into the top 3, so it was a shock when Moto Guzzi in 1935 won the Senior TT, wiht Stanley Woods (10-time winnner) at the helm. His mount was notable not only for its wide-angle ohc v-twin motor, but also for the effective rear suspension. By the next TT, all serious contenders had rear shocks!
AJS and Velocette had their own answers to the 'multi' brigade in their v-4 and Roarer twin, but BMW, using its characteristic flat-twin (but with an ohc, supercharged engine) won the Senior TT in 1939, on the very eve of the WW2. Supercharging was henceforth banned from the races.
Racing resumed in 1947, with the essentially pre-war designs of Norton, Velocette, and Moto Guzzi dominating their respective classes for a few years as the rest of Europe rebuilt.
In the 1950’s though, Italian (Guzzi, Gilera, MV) and German (NSU, BMW) machines came to the forefront with new and sophisticated multi-cylinder designs, culminating in the amazing Guzzi V-8. Bob McIntyre made the first 100mph lap in 1957, on a 4-cyl dohc Gilera. By the late 50’s British firms allowed their factory teams to languish, refusing to spend the vast sums demanded by race programs bearing no relation to consumer motorcycles. In 1957, most European manufacturers concurred by closing their race shops, leaving MV and BMW to battle private racers using ‘Manx’ Nortons and AJS/Matchless machinesBy the 1960’s, Japanese machinery, led by Honda, Suzuki and Yamaha, virtually took over the Lightweight TT. Honda began contesting the larger classes as well, using technically superior 4- and 6-cylinder double-overhead-cam engines, and the battles between Honda and MV became the stuff of legend. Honda quit racing in ’67, leaving Agostini on the MV to win all Senior and Junior TT’s from ’68 to ’73 (minus the ’71 Junior).
The ACU introduced the Production TT in 1967, and later Formula One and 750cc classes among others, to maintain variety in what had become a Japanese and MV benefit. Racing in these new categories became as closely watched as the ‘classics’, especially the 750cc TT, where one could watch similar-to-standard Superbikes from Norton, Triumph, and Honda duke it out. The Senior and Junior races were dominated from 1974 by Yamaha two-strokes, challenged by Suzuki later in the decade. Lap averages hit 110 mph, and a clamor from top riders such as Agostini, Phil Read, and Barry Sheene, resulted in the TT losing its World Championship status in ‘76. A high note in 1978 was the comeback of Mike Hailwood, riding a Ducati to win the Formula 1 race after a 10-year absence; good publicity for the TT at a time when calls for its total cancellation had reached a peak.
In the 1980’s and 90’s, race averages began to reach 120mph, and Joey Dunlop began his remarkable run of 26 wins. Lap speeds now stand at almost 130mph, and the increasing number of spectators and participants show the irresistible draw to motorcyclists across the globe, who want to experience the legendary race course and steep in its century of speed.