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Royal Enfield Classic 650 (2025) vs Yamaha SR 400SP (1983)

Comparison technical specifications


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2025 Royal Enfield Classic 650
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1983 Yamaha SR 400SP
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Make: Royal Enfield Yamaha
Model: Classic 650 SR 400SP
Years: 2025 1983
Engine: Inline twin cylinder, SOHC Four stroke, single cylinder, SOHC, 2 valves per cylinder.
Capacity: 647.95 cc / 39.5 cu in 399 cc / 24.3 cu-in
Bore x Stroke: 78 x 67.8mm 87 х 67.2 mm
Cooling System: Air/oil-cooled Air cooled
Compression Ratio: 9.5:1 8.5:1
Induction: Bosch fuel injection BSR33 carburetor
Ignition: Digital electronic ignition CDI
Starting: Electric and kick Kick
Max Power: 34.6 kW / 46.4 hp @ 7250 rpm 27 hp / 17.1 KW @ 7000 rpm
Max Torque: 51.5 Nm / 38.6 lb-ft @ 5650 rpm 27.4 Nm / 6.3 kgf-m @ 6500 rpm
Clutch: Wet multiplate Wet, Multiple Disc
Transmission: 6 Speed, constant mesh 5 Speed
Final Drive: Chain Chain
Frame: Steel tubular, double cradle Steel Double Cradle
Front Suspension: 44mm telescopic fork, Showa 35mm Telescopic fork
Front Wheel Travel: 120 mm / 4.7 in 105 mm / 4.1 in
Rear Suspension: Dual shocks, preload adjustable, Showa Dual shocks, 5-way adjustable preload
Front Brakes: Single floating disc, ? 320 mm, 2 piston floating caliper, ABS Single disc
Rear Brakes: Single disc, ? 300 mm / single floating caliper, ABS Drum
Front Tyre: 100/90 -19 3.50-19
Rear Tyre: 140/70 -18 4.00-16
Wheelbase: 1475 mm / 58.1 in 1410 mm / 55.5 IN
Ground Clearance: 154.9 mm / 6.1 in 130 mm / 5.1 in
Seat Height: 800 mm / 31.5 in 790 mm / 30.9 in
Wet Weight: 243 kg / 535 lbs 174 kg / 384 lbs
Fuel Capacity: 14.8 Litres / 3.9 US gal 12 Litres / 3.2 gal