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Triumph TR5T Trophy 500

Make Model	Triumph TR5T Trophy
Year	1970 -
Engine	Vertical twin, OHV
Capacity	490 cc / 29.9 cu-in
Bore x Stroke	69 x 65.5 mm
Compression Ratio	9.0:1
Lubrication	Dry sump
Cooling System	Air cooled
Induction	Single 26 mm Amal concentric carburetor
Ignition	Battery and coil
Battery	12V
Starting	Kick
Max Power	27.9 kW / 38 hp @ 7000 rpm
Clutch	Wet, multi-plate
Transmission	4-Speed
Final Drive	Chain
Front Suspension	Telescopic forks, Slimline
Rear Suspension	Swingarm, Girling shock absorbers
Front Brakes	Drum
Rear Brakes	Drum
Front Tyre	3.25 x 19
Rear Tyre	4.00 x 18
Rake	27^°
Wheelbase	1384.3 mm / 54.5 in
Ground Clearance	190.5 mm / 7.5 in
Seat Height	813 mm / 32 in
Wet Weight	167.3 kg / 369 lbs
Fuel Capacity	8.5 Litres / 2.25 US gal

Based on the Speed Twin, the TR5 was a trials machine designed for off-road use with a high level two into one exhaust and good handling on public roads. The name 'Trophy' came from the three 'specials' that Triumph built for the Italian International Six Day Trial in 1948, which went on to win three gold medals and the manufacturers team trophy. Racing in American Motorcyclist Association (AMA) Class C until 1969, the American export models included components from the Tiger 100 to create a motorcycle for desert competition.

The original TR5 Trophy models of 1949 used the aluminum cylinder barrels and heads from a generator motor Triumph had supplied for the War Department in WW2. This was Triumph's first aluminum cylinder head/barrel, and factory employees speculated during the War that the alloy heads, with their superior cooling properties, could easily be adapted for a motorcycle. The TR5 Trophy models from 1949-50 used modified versions of these cylinder heads, nicknamed the 'square barrel'. From 1951 the 498 cc (30.4 cu in) engine was updated with new alloy barrels and heads with finer-pitch finning and a rounded profile, which was shared with the Tiger 100 model. The TR5 was replaced with a new range of unit construction twins in 1959. Triumph TR5T Trophy Trail built for 1973 and 1974. Also known as the Adventurer.