1973 Triumph Daytona 500
1973 TRIUMPH DAYTONA – WHAT’S IN A NAME?
Triumph derived the name of this bike from Buddy Elmore’s win at the 1966 Daytona 200 at Daytona Beach FL riding a Triumph T100T Tiger 500 twin. It was Triumph’s first-ever Daytona victory, with an average speed of 96.6 mph. By 1967, it was an official production model with the designation T100R Daytona 500. Just to kick things off, Gary Nixon won the 1967 Daytona 200 on a new Triumph Daytona.
1973 TRIUMPH DAYTONA 500 BACKGROUND
Triumph master engineer Doug Hele completely reworked the cylinder head for the Daytona race bike such that 2 Amal carburetors were used (instead of the usual one), and the valve angles were reduced by 2-degrees to alleviate clearance problems between the two valves during overlap, due to the larger intake valves. Contrary to British custom, it was also an “oversquare” engine, meaning that the bore was larger than the length of the stroke. This made it “peaky”, meaning there was very little power at low RPMs, and it wasn’t until about 3500 RPM that it started to come alive. The valvetrain tended to wear out prematurely, causing excessive oil consumption. For the 1969 Triumph Daytona, they swapped the old timing-side bush (or bushing) for a ball bearing, and installed a roller bearing on the drive-side, greatly strengthening the bottom end and prolonging engine life. By 1973, Triumph had added special E3134 racing cams for both inlet and exhaust, strengthened cam followers, valve guides, and performance connecting rods.
1973 Triumph Daytona SPECIFICATIONS
| Model designation Engine type Displacement Bore & Stroke Compression ratio Fuel system Horsepower @ RPM Primary drive Clutch Gearbox Shifter Final drive Frame type Suspension, front Suspension, rear Brakes, front Brakes, rear Tire, front Tire, rear Wheelbase Curb weight Fuel capacity |
T100R Air-cooled OHV vertical twin 490cc / 30 ci 69mm X 65.5mm 9.0:1 2- 26mm Amal Concentric 40hp @ 7200 rpm Chain Multi-plate, wet 4-speed constant mesh Right-foot Chain Single down tube Telescopic fork, hydraulic Swing arm w/2 coil-over shocks 8-inch TLS drum 7-inch SLS drum 3.25 X 19 4.00 X 18 53.6″ / 1360mm 386 lbs / 175 kg 3.75 US gal / 14 L |
This is my go-to website for all things brit bike. Accurate and reliable info is much appreciated. I wish my memory wasn’t like a sieve and i didn’t have to keep coming here day after day… But there’s always something new or different to pine over.
Don Burnett won the 200 in 1962 on a Tiger 100