Yamaha XSR 900 GP (Japan only) (2024) vs Yamaha RD 400 (1977)

Comparison technical specifications

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Make:	Yamaha	Yamaha
Model:	XSR 900 GP (Japan only)	RD 400
Years:	2024	1977
Engine:	Four stroke, transverse triple cylinder, DOHC, 4 valves per cylinder	Two stroke, parallel twin cylinder, reed-valve torque induction
Capacity:	889 cc / 54.2 cu-in	398 cc / 24.2 cu-in
Bore x Stroke:	78 x 62.1 mm	64 х 62 mm
Cooling System:	Liquid cooled	Air cooled
Compression Ratio:	11.5:1	6.2:1
Lubrication:	Wet sump	Autolube
Induction:	Fuel injection with YCC-T	2x 28mm Mikuni carburetors
Ignition:	TCI: Transistor Controlled Ignition	Battery, dual coils, breaker points
Starting:	Electric	Kick
Max Power:	117.4 hp / 87.5 kW @ 10000 rpm	44 hp / 32.3 kW @ 7500 rpm
Max Torque:	93 Nm / 68.6 lb-ft @ 7000 rpm	41.1 Nm / 4.2 kgf-m @ 7000 rpm
Clutch:	Multiplate assist and slipper clutch	Wet multiplate
Transmission:	6 Speed	6 Speed
Final Drive:	O-ring chain	Chain
Front Suspension:	41mm inverted fork, adjustable rebound and spring preload	Telescopic forks
Rear Suspension:	Single shock absorber, link type suspension, swingarm	Swing arm, dual shocks
Front Brakes:	2 x 298mm Hydraulic discs 4 piston caliper	Single 267mm disc
Rear Brakes:	Single 245mm Hydraulic disc 2 piston caliper	Single 267mm disc
Front Tyre:	120/70 ZR17M/C (58W) Tubeless	3.00S-18
Rear Tyre:	180/55ZR17M/C (73W) Tubeless	3.50S-18
Dimensions:	Length 2155 mm / 84.8 in Width 860 mm / 33.8 in Height 1155 mm / 45.5 in	Length 1995 mm / 78.5 in Width 760 mm / 3.0 in Height 1060 mm / 41.7 in
Wheelbase:	1495 mm / 58.8 in	1320 mm / 51.9 in
Seat Height:	810 mm / 31.9 in	800 mm / 31.4 in
Ground Clearance:	140 mm / 5.5 in	150 mm / 5.9 in
Wet Weight:	193 kg / 425.4 lbs	171 kg / 376 lbs
Fuel Capacity:	14 Litres / 3.7 US gal	16.5 Litres / 4.3 US gal