Yamaha YBR 125 Custom (2007-) vs Yamaha XT 550 (1982) vs Kawasaki ZZ-R 1100 D (1999) vs Yamaha YZF R6S (2006-07) vs Ducati 1098 R Gulf EnduranceRacer (2008) vs Yamaha XV 1900 Roadliner S (2006-07) vs Honda FMX 650 Supermoto (2009-) vs Yamaha RD 350 (1975) vs Moto Guzzi Stornello 125 Scrambler America (1965-1967)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Kawasaki | Yamaha | Ducati | Yamaha | Honda | Yamaha | Moto Guzzi |
| Model: | YBR 125 Custom | XT 550 | ZZ-R 1100 D | YZF R6S | 1098 R Gulf EnduranceRacer | XV 1900 Roadliner S | FMX 650 Supermoto | RD 350 | Stornello 125 Scrambler America |
| Years: | 2007- | 1982 | 1999 | 2006-07 | 2008 | 2006-07 | 2009- | 1975 | 1965-1967 |
| Engine: | Four stroke, single cylinder, SOHC, 2 valves | Four stroke, single cylinder, SOHC, 4 valve | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, 90°“L†twin cylinder, DOHC, desmodromic4 valves per cylinder | Four stroke, pushrod 48° V-Twin, OHV, 2 valves per cylinder | Four stroke, single cylinder, SOHC, 4 valve | Two stroke, parallel twin cylinder, reed valves | Four stroke, single cylinder, 2 valve |
| Capacity: | 124 cc / 7.6 cu-in | 558 cc / 34.0 cu-in | 1052 cc / 64.1 cu-in | 599 cc / 36.5 cu-in | 1198 cc / 73.1 cu in | 1854 cc / 113 cu-in | 644 cc / 39.3 cu-in | 347 cc / 21.1 cu-in | 123 cc / 7.5 cu-in |
| Bore x Stroke: | 54 x 54 mm | 92 X 84 mm | 11.0:1 | 67 x 42.5 mm | 106 x 67.9 mm | 100 х 118 mm | 100 X 82 mm | 64 х 54 mm | 52 x 58 mm |
| Cooling System: | Air cooled | Air cooled | Liquid cooled, | Liquid cooled | Liquid cooled | Air cooled | Air cooled | Air cooled | Air cooled |
| Compression Ratio: | 10.0:1 | 8.5:1 | 76 x 58 mm | 12.8:1 | 12.8:1 | 9.5:1 | 8.3:1 | 6.6:1 | 8.0:1 |
| Induction: | Fuel infection | 26mm TK carburetor | 4x Keihin CVKD40 carbs | Fuel Injection | Marelli electronic fuel injection, ellipticalthrottle bodies | Twin-bore electronic fuel injection, 43mm throttle bodies and throttle position sensor | Single 40mm Keihin VE-type carburetors | 2, Mikuni VM28 SC | Dell'Orto ME 18 BS |
| Starting: | Electric & kick | Kick | Electric | Electric | Electric | Electric | Electric | Kick | Kick |
| Max Power: | 10.1 hp / 7.4 kW @ 7800 rrpm | 38 hp / 27.7 kW @ 6500 rpm | 147 hp / 108 kW @ 10500 rpm | 127 hp / 94.7 kW @14500 rpm | 132.4 kW / 180 hp @ 9750 rpm | 98.6 hp / 72.0 kW @ 4250 rpm | 39.4 hp / 28.7 kW @ 5750 rpm | 39 hp / 28.5 kW @ 7500 rpm | 13.4 hp / 40 kW @ 7,400 rpm |
| Final Drive: | Chain | Chain | Chain | Chain | Chain, front sprocket 15; rearsprocket 38 | Belt | Chain | Chain | Chain |
| Front Suspension: | Telescopic forks | 38mm Air assisted forks | 43mm forks preload and rebound adjustable. | 41mm upside down forks with 2-way compression damping adjustable | Öhlins 43mmfully adjustable upside-down fork with TiN | 46mm telescopic forks, | 45mm Inverted leading-axle telescopic fork | Telescopic forks | Telescopic forks |
| Rear Suspension: | Bottom link swingarm | Monoshock adjustable preload | Monoshock fully adjustable. | Fully adjustable rear shock absorber with 2-way compression damping | Progressive linkage withfully adjustable Öhlins TTXR monoshock with top-outspring. Aluminium single-sided swingarm. | Single shock, link-type, | Pro-Link mono shock, Swingarm | Dual shocks | Dual chocks |
| Front Brakes: | Single 245mm disc | Drum | 2x 320mm discs 4 piston calipers | 2x 320mm discs | 2 x 330 mm Discs, 4 pistoncalipers | 2x 298mm discs 4 piston calipers | Single 296mm disc 2 piston caliper | Single 267mm disc 2 piston caliper | Drum |
| Rear Brakes: | Drum | Drum | Single 240mm disc 1 piston caliper | Single 220mm disc | Single 245 mm disc, 2 pistoncaliper | Single 320mm disc 4 piston caliper | Single 220mm disc 1 piston caliper | 178mm Drum | Drum |
| Front Tyre: | 90/90-M21 | 3.00S-21-4PR | 120/70 VR17 | 120/70 ZR17 | 120/70 ZR17 | 130/70 -18 | 120/70 R17 | 3.00-18 | 2.75 -19 |
| Rear Tyre: | 90/90-M18 | 4.60S-18-4PR | 180/55 VR17 | 180/55 ZR17 | 190/55 ZR17 | 190/60 -17 | 150/60 R17 | 3.25-18 | 3.00 -17 |