Kawasaki S1 250SS MKI (1972-73) vs Yamaha WR 125R (2013-14) vs Harley-Davidson Harley Davidson FXST/I Softail Standard (2002-04) vs Yamaha RD 350 (1975) vs Yamaha IT 490 (1983)

Comparison technical specifications

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Make:	Kawasaki	Yamaha	Harley-Davidson	Yamaha	Yamaha
Model:	S1 250SS MKI	WR 125R	Harley Davidson FXST/I Softail Standard	RD 350	IT 490
Years:	1972-73	2013-14	2002-04	1975	1983
Engine:	Two stroke, transverse three cylinder,	Four stroke, forward inclined single cylinder, DOHC, 4 valve	Four stroke, 45° V-Twin, Twin Cam 88® vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder	Two stroke, parallel twin cylinder, reed valves	Two stroke, single cylinder, read valve
Capacity:	249 cc / 15.2 cu-in	124.7	1449 cc / 88.4 cu-in	347 cc / 21.1 cu-in	487 cc / 29.7 cu-in
Bore x Stroke:	45 x 52.3mm	52 x 58.6 mm	95.3 x 101.6 mm	64 х 54 mm	87 x 82 mm
Cooling System:	Air cooled	LLiquid cooled	Air cooled	Air cooled	Air cooled
Compression Ratio:	7,3:1	11.2:1	8.9:1	6.6:1	4.9;1
Induction:	3x Mikuni VM22SC, Ø 22 mm carburetor	Fuel injection	Carburetion 40 mm constant velocity with enrichener and accelerator pump ESPFI 38 mm throttle bore electronic sequential port fuel injection	2, Mikuni VM28 SC	VM38SS Mikuni carburetor
Ignition:	Battery and coil	TCI	Single-fire, non-wasted, map-controlled spark ignition	Battery, dual coils, breaker points	CDI
Max Power:	32 hp / 23.8 kW @ 8 500 rpm	10.9 kW / 15 hp @ 9000 rpm	67 hp / 48.8 kW @ 5200 rpm	39 hp / 28.5 kW @ 7500 rpm	35 hp @ 6000 rpm
Max Torque:	2.54 m-kg / 18.3 lb-ft @ 7 000 rpm	12.2 Nm / 1.24 kgf-m @ 6000 rpm	116.6 Nm / 86 lb-ft @ 3500rpm	24.1 lb-ft / 32.6 Nm @ 7000 rpm	31 lb-ft @ 5500 rpm
Transmission:	5 Speed	5 Speed	5 Speed	6 Speed	5 Speed
Final Drive:	Chain	Chain	Belt	Chain	Chain
Front Suspension:	Telescopic hydraulic forks	Telescopic fork	41.3 mm telescopic, “beer can” covers	Telescopic forks	43mm Telescopic adjustable forks
Rear Suspension:	Dual shocks, Swing arm	Swinging arm link suspension	Hidden, horizontal-mounted, coil-over shock	Dual shocks	Mono shock, adjustable spring preload and rebound damping
Front Brakes:	180mm Drum	Single 248mm disc	Single 292mm disc 4 piston caliper	Single 267mm disc 2 piston caliper	Drum
Rear Brakes:	180mm Drum	Single 220mm disc	Single 292mm disc 4 piston caliper	178mm Drum	Drum
Front Tyre:	3.00 -18	80/90-21	MH90-21 54H	3.00-18	3.00 -21
Rear Tyre:	3.25 -18	110/80-18	MT90B 16 74H	3.25-18	150/80 -18
Rake:	28°	27°	34.0°	27.5º	28°
Trail:	110 mm / 4.3 in	107 mm / 4.2 in	127 mm / 5.0 in	104 mm / 4.10 in	125 mm / 4.9 in
Wheelbase:	1585 mm / 62.4 in	1430 mm / 56.3 in	1698 mm / 66.9 in	1320.8 mm / 52.0 in	1435 mm / 56.5 in
Fuel Capacity:	15 Litres / 3.9 US gal	8.5 Litres / 2..2 US gal	18.9 Litres / 5.0 US gal	15.9 Litres / 4.2 gal	13.6 Litres / 3.6 US gal