Yamaha XV 750E (1981-82) vs Yamaha DT 250 (1981) vs Yamaha WR 250Z (1997) vs Suzuki GSX-R 750 (2014) vs Yamaha TT 600R (1998-99) vs Ducati XDiavel Black Star (2021)

Comparison technical specifications

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Make:	Yamaha	Yamaha	Yamaha	Suzuki	Yamaha	Ducati
Model:	XV 750E	DT 250	WR 250Z	GSX-R 750	TT 600R	XDiavel Black Star
Years:	1981-82	1981	1997	2014	1998-99	2021
Engine:	Four stroke, 75°-V-Twin cylinder, SOHC. 2 valve per cylinder.	Two stroke, single cylinder	Two stroke, single cylinder	Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.	Four stroke, single cylinder, SOHC, 4 Valve	Four stroke, Testastretta DVT (Desmodromic Variable Timing), 90° L-Twin, 4 Desmodromically actuated valves per cylinder, dual spark
Capacity:	748 cc / 45.6 cu-in	246 cc / 15.0 cu-in	249 cc / 15.2 cu-in	749 c / 45.7 cub. in.	595 cc / 36.5 cu-in	1262 cc / 77 cu in
Bore x Stroke:	83 x 69.2 mm	70 x 64 mm	68 x 68.8 mm	70 x 48.7 mm	95 x 84 mm	106 x 71.5 mm
Cooling System:	Air cooled	Air cooled	Liquid cooled	Liquid. High capacity large trapezoidal-shaped radiator which includes compact cooling fan assembly designed for improved air flow.	Air cooled	Liquid cooled
Compression Ratio:	8.7:1	6.8:1	10.9:1	12.5:1	8.5 :1	13.0:1
Induction:	34mm Keihin carburetors	Single 28mm Mikuni VM28SS	Mikuni VM38SS carburetor	New 32 bit ECM features 1024 kilobytes of ROM for maximum engine performance working in conjunction with the new S-DMS engine management system	26mm Dual stage Teikei Y26PV carburetor26mm Dual stage Teikei Y26PV carburetor	Electronic fuel injection system, 56mm elliptical throttle bodies full with ride-by-wire system
Ignition:	CDI	External-rotor magneto; CDI; six-volt battery	CDI	Digital DC-CDI	CDI	Electronic
Starting:	Electric	Kick	Kick	Electric	Kick	Electric
Front Suspension:	37mm Showa leading axle. adjustment for air pressure and rebound damping	Oil-damped, coil-spring fork with forward-mounted axle and	43mm inverted fork	Showa inverted 41 mm cartridge front forks fully adjustable for high and low speed compression, spring preload, and rebound damping	Telescopic forks	50mm USD adjustable forks with DLC treatment
Front Wheel Travel:	145 mm / 5.7 in	195 mm / 7.6 in	300 mm / 11.8 in	120 mm / 4.7 in.	280 mm / 10.6 in	120 mm / 4.7 in
Rear Suspension:	Monoshock single damper, adjustment for air pressure and rebound damping	DeCarbon-type, nitrogen-charged mono-shock producing	Monocross, swinging arm	Showa 41mm aluminum alloy rear shock with a 16mm rod diameter are fully adjustable for high and low speed compression, spring preload and rebound damping	Alloy swinging arm single shock with adjustable dampers	Single shock absorber, adjustable preload and rebound, remote reservoir, Single sided cast/trellis frame swingarm
Rear Wheel Travel:	87 mm / 3.4 in	152 mm / 5.9 in	315 mm / 12.4 in	130 mm / 5.1 in.	280 mm / 10.6 in	110 mm / 4.3 in
Front Brakes:	2x 267mm disc 2 piston calipers	Conical hub with drum brake	Single 204mm disc	2 x 310 mm Discs, radial-mount opposed-four-piston Brembo 4 piston monoblock calipers	Single 267mm disc	2x 320 mm semifloating discs, radial Brembo monobloc 4-piston M50 callipers, PR16/19 radial master cylinder
Rear Brakes:	Drum	Conical hub with rod-actuated drum brake	Single 189mm disc	Single 220 mm disc, Nissin single piston caliper	Single 220mm disc	Single 265 mm disc, Brembo 2-piston floating calliper
Front Tyre:	3.50-19	3.00-21	80/100-21	120/70 ZR17	90/90-21	120/70 ZR17 Pirelli Diablo Rosso III
Rear Tyre:	120/90-18	4.00-18	110/100-18	180/55 ZR17	130/90-18	240/45 ZR17 Pirelli Diablo Rosso III
Fuel Capacity:	14.5 Litres / 3.8 US gal	8.5 Litres / 2.2 gal	13 Litres / 3.4 US gal	17 Litres / 4.5 US gal / 3.7 Imp gal	10 Litres / 2.6 US gal	18 L / 4.75 US gal