Triumph TR65 Thunderbird (1982-83) vs Yamaha RD 200 (1979) vs Yamaha YX 600 Radian (1988-90)

Comparison technical specifications

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Make:	Triumph	Yamaha	Yamaha
Model:	TR65 Thunderbird	RD 200	YX 600 Radian
Years:	1982-83	1979	1988-90
Engine:	Four stroke, parallel twin cylinder, OHV	Two stroke, torque induction, parallel twin	Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.
Capacity:	649 cc / 39.6 cu in	195 cc / 11.8 cu-in	599 cc / 36.5 cu-in
Bore x Stroke:	76 x 71.5 mm	52 х 46 mm	58.5 x 55.7 mm
Compression Ratio:	8.6:1	7.1:1	10.0:1
Cooling System:	Air cooled	Air cooled	Air cooled
Induction:	Single 30 mm Amal carburetor	2x Y20P Carburetors	4X BS30 Mikuni Carburetor type
Starting:	Kick	Electric & Kick	Electric
Max Power:	31.3 kW / 42 hp @ 6500 rpm	20 hp / 14.7 kW @ 8000 rpm	66 hp / 49.2 kW @ 9500 rpm
Max Torque:	50.1 Nm / 5.1 kgf-m / 37 ft-lb @ 5500 rpm	1.9 kgf-m / 8.6 Nm @ 7000 rpm	51.9 Nm / 38,3 ft.-lbs @ 7500 rpm
Transmission:	5 Speed	5 Speed	6 Speed
Final Drive:	Chain	Chain	Chain
Front Suspension:	Telescopic fork	Telescopic forks	Telescopic forks, Coil spring, oil damper
Rear Suspension:	Dual Girling shocks, 5-way preload adjustment	Dual shocks	Swing arm, dual shock Coil spring, oil damper
Front Brakes:	Single 250 mm disc	Single 245 mm disc	2x 266mm discs 2 piston caliper
Rear Brakes:	178 mm Drum	Drum	Drum
Front Tyre:	3.25-19	2.75-18-4PR	110/90-16-59H
Rear Tyre:	4.00-18	3.25-18-4PR	130/90-16 67H
Wet Weight:	185 kg / 408 lbs	140.0 kg / 308.6 lbs	197 kg / 434 lbs
Dimensions:	Length: 2220 mm / 87.4 in	Length 1945 mm / 76.5 in Width 755 mm / 29.7 in Height 980 mm / 38.5 in	Lngth 2075 mm / 81.7 in Width 770 mm / 30.3 in Height 1095 mm / 43.1 in
Fuel Capacity:	18.2 L / 4.8 US gal / 4.0 Imp gal	11.5 Litres / 3.0 US gal	12. Litres / 3.2 US gal