Yamaha YX 600 Radian (1986-90) vs Harley-Davidson Harley Davidson FXRS 1340 Low Rider Custom (1986-87) vs Harley-Davidson Harley Davidson FLHTCU Electra Glide Ultra Classic (2007-08) vs Suzuki GSX 250F Across (1990-91)
Comparison technical specifications
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| Make: | Yamaha | Harley-Davidson | Harley-Davidson | Suzuki |
| Model: | YX 600 Radian | Harley Davidson FXRS 1340 Low Rider Custom | Harley Davidson FLHTCU Electra Glide Ultra Classic | GSX 250F Across |
| Years: | 1986-90 | 1986-87 | 2007-08 | 1990-91 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder. | Four stroke, 45° V-Twin, Twin Cam 96 vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 599 cc / 36.5 cu-in | 1337 cc / 81.5 cu-in | 1584 cc / 96 cu-in | 249 cc / 15.2 cu in |
| Bore x Stroke: | 58.5 x 55.7 mm | 88.8 x 108.0 mm | 95.2 x 111.2 mm | 49 x 33 mm |
| Cooling System: | Air cooled | Air cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 10.0:1 | 8.5:1 | 9.2:1 | 12.5:1 |
| Induction: | 4X BS30 Mikuni Carburetor type | 34mm Keihin carburetor | Electronic Sequential Port Fuel Injection (ESPFI) | 2 x Mikuni BSW27 carburetors |
| Ignition: | TCI | Col battery | Single-fire, non-wasted, map-controlled spark ignition | Digital |
| Max Torque: | 51.9 Nm / 38,3 ft.-lbs @ 7500 rpm | 90.8 Nm / 67 lb.-ft. @ 3600 rpm | 124.7 Nm / 92 ft. lbs @ 3000 rpm | 26.4 Nm / 2.7 kgf-m / 19.5 ft-lb @ 10500 |
| Transmission: | 6 Speed | 5 Speed | 6 Speed | 6 Speed, constant mesh |
| Final Drive: | Chain | Belt | Belt | Chain |
| Front Suspension: | Telescopic forks, Coil spring, oil damper | 38mm Telescopic air assistance, 175mm wheel travel. | 41.3 mm telescopic, cartridge-style damping | Telescopic forks |
| Rear Suspension: | Swing arm, dual shock Coil spring, oil damper | Dual shocks preload adjustable, 91mm wheel travel. | Short, air-adjustable shock | Swingarm, monoshock |
| Front Brakes: | 2x 266mm discs 2 piston caliper | Single 292mm discs | 2x 292mm disc 4 piston caliper | Single 300 mm disc, 2 piston caliper |
| Rear Brakes: | Drum | Single 292mm disc | Single 292mm disc 4 piston caliper | Single 240 mm disc |
| Front Tyre: | 110/90-16-59H | MJ 90-19 | MT90B16 | 110/70-17 |
| Rear Tyre: | 130/90-16 67H | MT 90-16 | MU85B16 | 140/70-17 |
| Fuel Capacity: | 12. Litres / 3.2 US gal | 16.0 Litres / 4.2 US gal | 22 7 Litres / 6.0 US gal | 12 L / 3.2 US gal / 2.6 Imp gal |