1970 Triumph Daytona 500

1970 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.

1970 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.


1970 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
39hp @ 7400 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

Check out these TRIUMPH BOOKS




2018 Classic Triumph Calendar


Triumph Motorcycles: The art of the motorcycle


The Complete Book of Classic and Modern Triumph Motorcycles 1937-Today (Complete Book Series)


Triumph Motorcycles: From Speed-Twin to Bonneville


Triumph Bonneville and TR6 Motorcycle Restoration Guide: 1956-83


British Motorcycles Triumph (Little Books)


Triumph Motorcycles in America


McQueen's Motorcycles: Racing and Riding with the King of Cool


Triumph Motorcycle Restoration


Illustrated Triumph Motorcycles Buyer's Guide: From 1945 Through the Latest Models (Illustrated Buyer's Guide)


Tales of Triumph Motorcycles and the Meriden Factory


Hinckley Triumphs: The First Generation (Crowood Motoclassic)

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Last updated 12/2/17

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