Yamaha SR 400 (2004-08) vs Yamaha XS 650 (XS-1) (1969) vs Yamaha RS 200 (1979-81) vs Yamaha XT 250 (2004-05) vs Yamaha VR 300 Versity (2004) vs Yamaha DT 250 (1979-80) vs Yamaha XT 660X (2009) vs Yamaha WR 250Z (1998) vs Yamaha RD 125 (1979-80) vs Yamaha SR 400SP (1979) vs Yamaha XT 660X (2004-05) vs Yamaha SR 400SP (2004)

Comparison technical specifications

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Make:	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha
Model:	SR 400	XS 650 (XS-1)	RS 200	XT 250	VR 300 Versity	DT 250	XT 660X	WR 250Z	RD 125	SR 400SP	XT 660X	SR 400SP
Years:	2004-08	1969	1979-81	2004-05	2004	1979-80	2009	1998	1979-80	1979	2004-05	2004
Engine:	Four stroke, single cylinder, SOHC, 2 valves per cylinder.	Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder.	Two stoke, parallel twin	Four stroke, single cylinder. SOHC, 2 valve	Four stroke, single cylinder.	Two stroke, single cylinder	Four stroke, single cylinder, SOHC, 4 valve	Two stroke, single cylinder	Two stroke, parallel twin	Four stroke, single cylinder, SOHC, 2 valves per cylinder.	Four stroke, single cylinder, SOHC, 4 valve	Four stroke, single cylinder, SOHC, 2 valves per cylinder.
Capacity:	399 cc / 24.3 cu-in	653 cc / 39.8 cu in	195 cc / 11.8 cu-in	249 cc / 15.2 cu-in	264 cc / 16.1 cu-in	246 cc / 15.0 cu-in	659 cc/ 40.2 cu-in	249 cc / 15.2 cu-in	124 cc / 7.6 cu-in	399 cc / 24.3 cu-in	659 cc/ 40.2 cu-in	399 cc / 24.3 cu-in
Bore x Stroke:	87 х 67.2 mm	75 x 74 mm	52 x 46 mm	74.0 x 58.0mm	71 x 66.8 mm	70 x 64 mm	100 x 84 mm	68 x 68.8 mm	43 х 43 mm	87 х 67.2 mm	100 x 84 mm	87 х 67.2 mm
Compression Ratio:	8.5:1	8.4:1	6.5:1	9.5;1	10.0:1	6.8:1	10: 1	10.9:1	6.8:1	8.5:1	10: 1	8.5:1
Induction:	BSR33 carburetor	2 x Mikuni carburetors	Single Mikuni, VM 24SS Carburetor	34mm Mikuni carburetor	Teikei Y28V-!j	Single 28mm Mikuni VM28SS	Fuel injection, 44 mm throttle body	Mikuni VM38SS carburetor	2x 18mm Teikei carburetors	BSR33 carburetor	Fuel injection, 44 mm throttle body	BSR33 carburetor
Ignition:	CDI	Battery, induction coil	Battery	CDI	TCI	External-rotor magneto; CDI; six-volt battery	TCI	CDI	Battery coil	CDI	TCI	CDI
Starting:	Kick	Kick	Electric & Kick	Electric	Electric	Kick	Electric	Kick	Kick	Kick	Electric	Kick
Max Power:	27 hp / 17.1 KW @ 7000 rpm	39.5 kW / 53 hp @ 7200 rpm	17.7 hp / 13.0 kW @ 7500 rpm	21 hp / 16.6 kW @ 6500 rpm	15.2 hp / 11.1 kW @ 7500	17 hp 12.6 kW @ 6000 rpm	33.8 kW / 48 hp @ 6000 rpm	49.8 hp / 37.2 kW @ 8250 rpm	17 hp / 12.4 kW @ 8500 rpm	27 hp / 17.1 KW @ 7000 rpm	33.8 kW / 48 hp @ 6000 rpm	27 hp / 17.1 KW @ 7000 rpm
Max Torque:	27.4 Nm / 6.3 kgf-m @ 6500 rpm	54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 6800 rpm	18.3 Nm / 1.87 kg-m @ 6000rpm	2.1 kgf-m / 15.1 lb-ft @ 6500 rpm	21.6 Nm / 15.9 kW @ 6000 rpm	20.7 Nm / 15.3 lb-ft @ 5500 rpm	58.4 Nm / 5.7 kgf-m @ 5250 rpm	4.69 kgf-m / 44.5 Nm @ 7500 rpm	1.3 kgf-m @ 8000 rpm	27.4 Nm / 6.3 kgf-m @ 6500 rpm	58.4 Nm / 5.7 kgf-m @ 5250 rpm	27.4 Nm / 6.3 kgf-m @ 6500 rpm
Front Suspension:	Telescopic fork	Telescopic forks	Telescopic forks	35mm Telescopic forks	Telescopic fork	Oil-damped, coil-spring fork with forward-mounted axle and	43 mm Telescopic forks,	43mm inverted fork	28 mm telescopic forks	35mm Telescopic fork	43 mm Telescopic forks,	Telescopic fork
Rear Suspension:	Dual shocks	Dual shock absorbers	Dual shocks	Monocross, Swingarm rebound-adjustable single shock	Unit swing	DeCarbon-type, nitrogen-charged mono-shock producing	Oscillating arm standard Monocross.	Monocross, swinging arm	Dual rear shock pre-load adjustable	Dual shocks, 5-way adjustable preload	Oscillating arm standard Monocross.	Dual shocks
Front Brakes:	Single disc	Drum	Drum	Single 245mm disc	Single 270mm disc	Conical hub with drum brake	Single 320mm disc 4 piston caliper	Single 204mm disc	Single240mm disc	Single disc	Single 320mm disc 4 piston caliper	Single disc
Rear Brakes:	Drum	Drum	Drum	Single 203mm disc	Single 240mm disc	Conical hub with rod-actuated drum brake	Single 245mm disc 1 piston caliper	Single 189mm disc	130 mm Drum	Drum	Single 245mm disc 1 piston caliper	Drum
Front Tyre:	3.50-19	3.50-19	2.75-17	80/70-21	120/80-14	3.00-21	120/700-17	80/100-21	2.75-18	3.50-19	120/700-17	3.50-19
Rear Tyre:	4.00-16	4.00-18	3.00-17	120/80-18	150/70-14	4.00-18	160/60-17	110/100-18	3.00-18	4.00-16	160/60-17	4.00-16
Wheelbase:	1410 mm / 55.5 IN	1410 mm / 55.5"	1245 mm / 49.0 in	1359 mm / 53.5 in	1565 mm / 61.6 in	1420 mm / 55.9 in	1505 mm / 59.3 in	1480 mm / 58.2 in	1245 mm / 49.0 in	1410 mm / 55.5 IN	1505 mm / 59.3 in	1410 mm / 55.5 IN
Fuel Capacity:	12 Litres / 3.2 gal	12.5 Litres / 3.3 US gal	11.5 Litres / 3.0 us gal	9.8 Litres / 2.6 US gal	11.7 Litres / 3.0 US gal	8.5 Litres / 2.2 gal	15 Litres / 3.9 gal	13 Litres / 3.4 US gal	11.5 Litres / 3.04 US gal	12 Litres / 3.2 gal	15 Litres / 3.9 gal	12 Litres / 3.2 gal