Yamaha SRX 250 (1984-86) vs Yamaha XS 250 DOHC (1984-) vs Kawasaki H2 Carbon Limited Edition (2017-18) vs Yamaha SRX 400 (1987-90) vs Yamaha SR 500 (1984-87)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Kawasaki | Yamaha | Yamaha |
| Model: | SRX 250 | XS 250 DOHC | H2 Carbon Limited Edition | SRX 400 | SR 500 |
| Years: | 1984-86 | 1984- | 2017-18 | 1987-90 | 1984-87 |
| Engine: | Four stroke, single cylinder, DOHC, 4 valves | Four stroke, 180° parallel twin, DOHC, 2 valves per cylinder | Four Stroke, transverse four cylinder, DOHC, 16 valve, Supercharger Centrifugal, scroll-type | Four stroke, single cylinder, SOHC, 4 valves | Four stroke, single cylinder, SOHC, 2 valves per cylinder. |
| Capacity: | 249 cc / 15.2 cu-in | 248 cc / 15.2 cu-in | 998 cc / 60.9 cub in | 399 cc / 24.3 cu-in | 499 cc / 30.4 cu-in |
| Bore x Stroke: | 73 х 59.6 mm | 56 х 50.6 mm | 76 x 55 mm | 87 х 67.2 mm | 87 х 84 mm |
| Cooling System: | Air cooled | Air cooled | Liquid cooled | Air cooled | Air cooled |
| Compression Ratio: | 10.0:1 | 10.1:1 | 8.5:1 | 9.2:1 | 9.0:1 |
| Induction: | Y22PV Teikei carburetor | 2x 32mm Mikuni carburetors | 50 mm x 4 with dual injection, | YDIS Twin Carburetor | 34mm Mikuni VM34SS carburetor |
| Ignition: | TCI | Coil and cb | Digital | TCI | CDI |
| Starting: | Electric | Kick | Electric | kick | Kick |
| Max Power: | 32 hp / 23.8 kW @ 10000 rpm | 30 hp / 22.3 kW @ 10000 rpm | 200 hp / 146.0 kW @ 12500 rpm | 33 hp / 24.6 kW @ 7000 rpm | 31.5 hp / 23.5 kW @ 6500 rpm |
| Max Torque: | 2.4 kgf-m / 17.3 lb-ft @ 8500 rpm | 2.2 kgf-m / 15.2 lb-ft @ 8500 rpm | 133 Nm / 98.1 lb-ft @ 10500 rpm | 3.4 kgf-m / 24.5 lb-ft @ 6000 rpm | 36.3 Nm / 26.8 lb-ft @ 5500 rpm |
| Transmission: | 6 Speed | 6 Speed | 6-Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Chain, 428 Heavy Duty O-Ring, 138 links | Chain |
| Front Suspension: | Centre axle 33mm forks | Telescopic forks | 43 mm Inverted fork with rebound and compression damping, spring preload adjustability and top-out springs | Telescopic forks | 35mm telescopic forks |
| Rear Suspension: | Single shock, adjustable spring preload | Dual shocks, swing arm, 5-position preload adjustable | Uni-Trak® with gas-charged shock, piggyback reservoir, dual-range (high/low-speed) compression damping, rebound damping and preload adjustability, and top-out spring | Dual shocks | Dual shock, 5-way adjustable spring preload. |
| Front Brakes: | Single disc 2 piston caliper | Single 267mm disc | Dual 330 mm discs, radial-mount, opposed 4-piston calipers, dual semi-floating | Single 320mm disc 4 piston caliper | Single 200mm disc |
| Rear Brakes: | Drum | 178mm Drum | Single 250mm disc, opposed 2-piston calipers, | Single disc | 150mm drum |
| Front Tyre: | 90/90-16 | 3.00-18 | 120/70 ZR17 M/C (58W) | 110/70-17 Tubeless | 3.50 S18 |
| Rear Tyre: | 100/90-18 | 3.50-18 | 200/55 ZR17 M/C (78W) | 140/70-17 Tubeless | 4.00 S18 |
| Fuel Capacity: | 9 Litres / 2.3 US gal | 14 Litres / 3.7 US gal | 17 Litres / 4.5 US gal | 15 Liters / 3.9 US gal | 12 Litres / 3.1 US gal |