Kawasaki KDX 125SR (1997-98) vs Yamaha DT 125 (1973-74) vs Harley-Davidson Harley Davidson FLHR/I Road King (2003-04) vs Triumph Bonneville T100 50th Anniversary (2009)
Comparison technical specifications
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| Make: | Kawasaki | Yamaha | Harley-Davidson | Triumph |
| Model: | KDX 125SR | DT 125 | Harley Davidson FLHR/I Road King | Bonneville T100 50th Anniversary |
| Years: | 1997-98 | 1973-74 | 2003-04 | 2009 |
| Engine: | Two stroke, single cylinder, with KIPS | Two stroke, single cylinder | Four stroke, 45° V-Twin, Twin Cam 88® vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder | Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 124 cc / 7.6 cu-in | 123 cc / 7.5 cu-in | 1449 cc / 88.4 cu-in | 865 cc / 52.8 cu in |
| Bore x Stroke: | 56 х 50.6 mm | 56 х 50 mm | 95.3 x 101.6 mm | 90 x 68 mm |
| Cooling System: | Liquid cooled | Air cooled | Air cooled | Air-cooled |
| Compression Ratio: | 8,0:1 | 6.9:1 | 8.9:1 | 9.2:1 |
| Induction: | Keihin PE28 carburetor | Mikuni TS28SS Carburettor | Carburetion 40 mm constant velocity with enrichener and accelerator pump ESPFI 38 mm throttle bore electronic sequential port fuel injection | Fuel injection |
| Ignition: | CDI | Magneto | Single-fire, non-wasted, map-controlled spark ignition | Digital |
| Starting: | Electric | kick | Electric | Electric |
| Max Torque: | 21.8 Nm / 16 lb-ft @ 8600 rpm | 1.4 kgf-m / 10 lb-ft @ 7000 rpm | 116.6 Nm / 86 lb-ft @ 3500rpm | 69 Nm / 7.04 kgf-m / 51 ft-lb @ 5800 rpm |
| Transmission: | 6 Speed | 5 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Belt | Chain, X-ring |
| Front Suspension: | Kayaba 48mm telescopic hydraulic fork reversed KAYABA 48mm, double adjustment + adjustable spring preload, prepared | Telescopic forks | 41.3mm Telescopic forks | 41mm Kayaba telescopic forks |
| Rear Suspension: | Uni-Trak adjustable for preload | Dual shocks | Dual air adjustable shocks | Kayaba chrome spring twin shocks with adjustable preload |
| Front Brakes: | Single 260mm disc | Drum | 2x 292mm discs 4 piston calipers | Single 310 mm disc, 2 piston calipers |
| Rear Brakes: | Single 220mm disc | Drum | Single 292mm disc 4 piston caliper | Single 255 mm disc, 2 piston calipers |
| Front Tyre: | 70/100-21 | 2.75-21 | D402F NW MT90B16 72H | 100/90 19 |
| Rear Tyre: | 4.10-18 | 3.50-18 | D402 NW MU85B16 77H | 130/80 17 |
| Fuel Capacity: | 9.0 Litres / 2.3 US gal | 9.5 Litres / 2.5 US gal | 18 9 Litres / 5.0 US gal | 16.6 Litres / 4.4 US gal / 3.7 Imp gal |