BMW C 650 GT (2012-13) vs Yamaha MT-01 Kenny Roberts Design (2007) vs Yamaha XS 650 Midnight Special (1981) vs Yamaha XJ 550R Sega (1981) vs Kawasaki Z 900LTD (1976) vs Yamaha XS 400 (1977-78) vs Yamaha RD 125 (1977) vs Yamaha RD / RZ 125LC (1981-82) vs BMW HP 4 Racer (2018)

Comparison technical specifications

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Make:	BMW	Yamaha	Yamaha	Yamaha	Kawasaki	Yamaha	Yamaha	Yamaha	BMW
Model:	C 650 GT	MT-01 Kenny Roberts Design	XS 650 Midnight Special	XJ 550R Sega	Z 900LTD	XS 400	RD 125	RD / RZ 125LC	HP 4 Racer
Years:	2012-13	2007	1981	1981	1976	1977-78	1977	1981-82	2018
Engine:	Four stroke, twin-cylinder, DOHC, 4 Valves per cylinder	Four stroke, 48° V-Twin cylinder, SOHC, 4 valves per cylinder.	Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder.	Four stroke, transverse four cylinder. DOHC, 2 valves per cylinder.	Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder.	Four stroke, 180° parallel twin, SOHC, 2 valves per cylinder	Two stroke, parallel twin	Two stroke, single cylinder	Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder
Capacity:	647 cc / 38.5 cub in.	1670 cc / 101.9 cu-in	653 cc / 39.8 cu in	528 cc / 32.2 cu-in	903 cc / 55.1 cu-in	392 cc / 23.9 cu-in	124 cc / 7.6 cu-in	123 cc / 7.5 cu-in	999 cc / 61 cu in.
Bore x Stroke:	79 x 66 mm	97 x 113 mm	75 x 74 mm	57 X 51.8 mm	66 x 66 mm	69.0 x 52.4 mm	43 х 43 mm	56 х 50 mm	80 x 49,7 mm
Compression Ratio:	11.6:1	8.36:1	8.5:1	9.5:1	8.5:1	9.2:1	6.8:1	6.4:1	13.7-13.9 : 1
Induction:	Fuel injection BMS-E, 38mm Throttle valve	Twin-bore fuel injection (FI)	2 x Mikuni BS34SU carburetors	4x 28mm Mikuni carburetors	4x 26mm Mikuni VM26SS	2x Mikuni BS32 carburetors	2x 18mm Teikei carburetors	24mm Mikuni carburetors	Mixture control engine management Electronic racing injection, variable intake pipe length, four selectable modes
Starting:	Electric	Electric	Electric and kick	Electric	Electric	Electric & kick	Kick	Kick	Electric
Max Power:	44 kW / 60 hp @ 7500 rpm	66.3 kW / 90 hp @ 4750 rpm	39.5 kW / 53 hp @ 7200 rpm	37 kW / 50 PS @ 9000 rpm	82 hp / 59.8 kW @ 8500 rpm	36 hp / 26.8 kW @ 8100 rpm	17 hp / 12.4 kW @ 8500 rpm	20 hp / 15.5 kW @ 9500 rpm	158 kW / 215 hp @ 13900 rpm (maximum speed 14,500 rpm)
Max Torque:	66 Nm / 6.7 kgf-m / 48.7 lb-ft. @ 6000 rpm	150.1Nm / 110.7lb-ft @ 3750rpm	54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 5500 rpm	41.9 Nm / 4,3 m-kg @ 7500 rpm	73.5 Nm / 52.8 lb-ft @ 7000 rpm	3.3 kgf-m / 23.8 lb-ft @ 8000 rpm	1.3 kgf-m @ 8000 rpm	1.6 kgf-m / 16 Nm @ 9250 rpm	120 Nm / 88.5 lb-ft @ 10000 rpm
Transmission:	CVT (continuously variable transmission)	5 Speed	5 Speed	6 Speed	5 Speed	6 Speed	5 Speed	6 Speed	Constant-mesh 6 speed racing transmission (EVO) with straight-cut gears
Front Suspension:	System Upside down fork Ø 40 mm / 1.6 in.	Inverted telescopic fork;	Telescopic forks	Telescopic coil spring forks	36mm Telescopic forks	Telescopic fork	28 mm telescopic forks	32mm Telescopic forks	Öhlins FGR 300 WSBK fork, adjustable rebound and compression-stage damping, adjustable spring preload, Öhlins SD052 adjustable steering damper, front wheel quick-change system thanks to rotatable forklegs with front-wheel cover mounted (brake calipers need not be removed to change a wheel) spring stiffness 10.5 N/mm
Rear Suspension:	System Cast single swingarm.	Swingarm with fully adjustable single shock;	Dual shock absorbers	Swinging arm with dual dampers adjustable for preload	Dual shock, 5-way preload adjustment	Dual shocks swing arm, preload adjustable	Dual rear shock pre-load adjustable	Monocross linkage 6-way preload adjustment	Aluminium WSBK swinging arm, Öhlins TTX 36 GP central spring strut, adjustable rebound and compression-stage damping, adjustable spring preload, top spring strut pivot point adjustable (0/3 mm), adjustable spring strut deflection (tension strut length), contact surfaces for wheel spacer bush on chain tensioners for simple/hands free wheel fitting, chain tensioner titanium on outside, aluminium on inside, CFRP auxiliary stand mountings on swinging arm, spring stiffness 95N/mm
Front Brakes:	2x 270mm discs 2 piston caliper, ABS	2x 320 mm discs 4 piston calipers	Twin hydraulic discs, 267 mm	2x 267mm discs	Single 296mm disc 2 piston caliper	Single disc	Single240mm disc	Single 245mm disc	2 x Brembo Racing disc brake, T-floating racing brake discs, 320×6.75 mm diameter, 4-piston monobloc WSBK GP4-PR fixed caliper with titanium pistons, Brembo Racing RCS19X18 master cylinder, including adjustable Brembo Racing brake lever, Brembo Racing clutch lever (without clutch switch)
Rear Brakes:	Single 270mm disc 2 piston caliper, ABS	Single 267 mm disc 1 piston caliper	Single hydraulic disc, 267 mm	182mm Drum	Single 277mm disc	Drum	130 mm Drum	130mm Drum	Single Brembo Racing disc brake, 4-piston WSBK fixed caliper with titanium pistons, brake disc diameter 220×4.0 mm Dimensions / weights
Front Tyre:	120/70 R15	120/70 ZR18	3.50S-19	3.25-19	3.25H-19	3.00-18	2.75-18	2.75-18-4PR	120/70 ZR 17 Pirelli Diabolo Superbike Slick SC2
Rear Tyre:	160/60 R15	190/50 ZR17	130/90S-16	110/ 90-16	4.00S-16	3.50-18	3.00-18	3.00-18-6PR	200/60 ZR 17 Pirelli Diabolo Superbike Slick SC2
Fuel Capacity:	16 Litres / 4.2 US gal.	15 Litres / 3.2 gal	11.5 Litres / 3.0 US gal	15 liters / 3.9 US gal	18 Litres / 4.7 gal	14 Litres / 3.7 US gal	11.5 Litres / 3.04 US gal	13 Litres / 3.4 US gal	17.5 Litres / US 4.6 gal.