Yamaha RD 350F (1985) vs Yamaha XSR 155 (2019) vs Yamaha RD 350RR (1985) vs Yamaha YZF 600R Thundercat (1996) vs Yamaha XT 225 Serow (1985-86) vs Yamaha TT 600R (2000-01)

Comparison technical specifications

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Make:	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha	Yamaha
Model:	RD 350F	XSR 155	RD 350RR	YZF 600R Thundercat	XT 225 Serow	TT 600R
Years:	1985	2019	1985	1996	1985-86	2000-01
Engine:	Two stroke, parallel twin cylinder, YPVS	Four stroke, single cylinder, SOHC, 4 valve with variable valve actuation	Two stroke, parallel twin cylinder, YPVS	Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder	Four stroke, single cylinder, SOHC, 2 valve	Four stroke, single cylinder, SOHC, 4 Valve
Capacity:	347 cc / 21.1 cu-in	155.1 cc / 9.14 cu-in	347 cc / 21.1 cu-in	599 cc / 36.5 cu-in	223 cc / 13.6 cu-in	595 cc / 36.5 cu-in
Bore x Stroke:	64 х 54 mm	58.0 × 58.7 mm	64 х 54 mm	62 x 49.6 mm	70 X 58mm	95 x 84 mm
Cooling System:	Liquid cooled	Liquid cooled	Liquid cooled	Liquid cooled	Air cooled	Air cooled
Compression Ratio:	6.2 :1	11.6:1	6.2 :1	12.0:1	9.5:1	8.5 :1
Induction:	2x 26mm Mikuni slide-needle carburetor	Fuel Injection	2x 26mm Mikuni slide-needle carburetor	4 x 36 mm Keihin CV downdraft carburetors	34mm Mikuni carburetor	26mm Dual stage Teikei Y26PV carburetor26mm Dual stage Teikei Y26PV carburetor
Ignition:	Flywheel magneto CDI	TCI	Flywheel magneto CDI	Digital TCI	CDI	CDI
Starting:	Kick	Electric	Kick	Electric	Kick	Kick
Max Power:	59 hp / 43.9 kW @ 9000 rpm	14.1 kW / 19 hp @ 10000 rpm	59 hp / 43.9 kW @ 9000 rpm	72.9 kW / 100 hp @ 11500 rpm	20 hp / 15 kW @ 8000 rpm	42 hp / 31.5 kW @ 6500 rpm
Max Torque:	40.2 Nm / 4.1 kgf-m / @ 8000 rpm	14.7 Nm / 40.8 lb-ft @ 8500 rpm	40.2 Nm / 4.1 kgf-m / @ 8000 rpm	65.7 Nm / 6.7 kgf-m / 48.7 lb-ft @ 9500 rpm	19 Nm / 14 lb-ft @ 7000 rpm	50 Nm / 36.8 lb-ft @ 5000 rpm
Front Suspension:	35mm Telescopic forks air assistance and variable damping	Upside-down Telescopic fork	35mm Telescopic forks air assistance and variable damping	41 mm telescopic fork adjustable preload, compression and rebound damping	Telescopic fork	Telescopic forks
Rear Suspension:	Rising rate Monocross 5-way preload	Monoshock operating on a die-cast aluminium swingarm	Rising rate Monocross 5-way preload	Monoshock adjustable preload, bump and rebound	Swingarm rebound adjustable. single shock	Alloy swinging arm single shock with adjustable dampers
Front Brakes:	2x 260mm disc 2 piston calipers	Single 282mm disc 2 piston caliper, ABS	2x 260mm disc 2 piston calipers	2x 300 mm Discs, 4 piston calipers	Single 220mm disc	Single 267mm disc
Rear Brakes:	Single 260mm disc 1 piston caliper	Single 240mm disc 1 piston caliper, ABS	Single 260mm disc 1 piston caliper	Single 245mm disc, 2 piston caliper	Single 110mm drum	Single 220mm disc
Front Tyre:	90/90-18 51H	110/70 -17	90/90-18 51H	120/60-17	2.75-21	90/90-21
Rear Tyre:	110/80-18 58H	140/70 -17	110/80-18 58H	160/60-17	120/80-18	130/90-18
Wheelbase:	1385 mm / 54.5 in	1330 mm / 52.3 in	1385 mm / 54.5 in	1415 mm / 55.7 in	1349 mm / 53.1 in	1480 mm / 58.2 in
Seat Height:	790 mm / 31.1 in	810 mm / 31.8 in	790 mm / 31.1 in	810 mm / 31.7 in	810 mm / 31.9 in	945 mm / 37.2 in
Fuel Capacity:	17 Litres / 4.5 US gal	10 Litres / 2.6 US gal	17 Litres / 4.5 US gal	19 Litres / 5.0 US gal / 4.2 Imp gal	8.7 Liters / 2.3 US gal	10 Litres / 2.6 US gal