Harley-Davidson Harley Davidson XLS 1000 Roadster (1979-85) vs Aprilia RSV-4 APRC / ABS (2011) vs Harley-Davidson Harley Davidson FLHTCUTG Tri Glide Ultra (2017-18) vs Yamaha FZ 16 Vixion (2008-10)
Comparison technical specifications
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| Make: | Harley-Davidson | Aprilia | Harley-Davidson | Yamaha |
| Model: | Harley Davidson XLS 1000 Roadster | RSV-4 APRC / ABS | Harley Davidson FLHTCUTG Tri Glide Ultra | FZ 16 Vixion |
| Years: | 1979-85 | 2011 | 2017-18 | 2008-10 |
| Engine: | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder | Four stroke, longitudinal 65° V four , DOHC, 4 valves per cylinder | Four stroke, V-Twin, Milwaukee-Eight 107, Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters, 4 valves per cylinder | Four stroke, single cylinder, SOHC, 2-valve |
| Capacity: | 998 cc / 60.8 cu-in | 999.1 cc / 61.0 cu-in | 1746 cc / 107 cub in. | 153 cc / 9.3 cu-in |
| Bore x Stroke: | 81 x 96.8 mm | 78 x 52.3 mm | 100 x 111 mm / 3.937 x 4.374 in | 58 × 57.9mm |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Air-cooled |
| Compression Ratio: | 8.8;1 | 13.0:1 | 10.0:1 | 9.5:1 |
| Induction: | 38mm Keihin carburetor | Airbox with front dynamic air intakes. Variable length intake ducts controlled via ECU. 4 Weber-Marelli 48-mm throttle bodies with 8 injectors and latest generation Ride-by-Wire engine management. Choice of three different engine maps selectable by the rider with bike in motion: T (Track), S (Sport), R (Road) Magneti Marelli digital electronic ignition system integrated in engine control system, with one spark plug per cylinder and "stick-coil"-type coils | Electronic Sequential Port Fuel Injection (ESPFI) | 26mm CV BS26 carburetor |
| Ignition: | Transistorized | Electronic digital ignition integrated in the fuel management system. | Single-fire, non-wasted, map-controlled spark ignition | CDI |
| Starting: | Electric | Electric | Electric | Electric and Kick |
| Max Torque: | 55 ft-lb / 74 Nm @ 4000 rpm | 115 Nm / 11.7 kgf-m / 84.8 lb-ft @ 10000 rpm | 154 Nm / 113.6 lb-ft @ 3250 rpm | 14 Nm / 10.3 lb-ft @ 6000 rpm |
| Transmission: | 4 Speed | 6 Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Belt | Chain |
| Front Suspension: | Telehydraulic forks | Upside-down Sachs fork with Ø43 mm stanchions. Aluminium radial caliper mounts. Completely adjustable spring preload and hydraulic compression and rebound damping. | 41.3 mm telescopic, triple-circuit damping, | 41mm Telescopic Forks |
| Rear Suspension: | Dual shocks swinging arm fork | Double braced aluminium swingarm; mixed low thickness and sheet casting technology. Sachs piggy back monoshock with completely adjustable: spring preload, wheelbase, hydraulic compression and rebound damping. APS progressive linkage. | Air-adjustable | Monocross type |
| Front Brakes: | 2x 254mm discs | 2 x Ø320 mm diameter floating stainless steel disc with lightweight stainless steel rotor and aluminium flange with 6 pins. Brembo monobloc radial calipers with 4 x Ø34 mm opposite. Sintered pads. Radial pump and metal braided brake hose | 2x 300mm disc, 4 piston caliper | Single 257mm disc 2 piston caliper |
| Rear Brakes: | Single 292mm disc | Single Ø220 mm diameter disc, Brembo floating caliper with two Ø32 mm isolated pistons. Pump with integrated tank and metal braided hose | 2x 229mm disc, 1 piston caliper | 130mm Drum |
| Front Tyre: | MJ 90-19 | 120/70 ZR17 | MT90B16 72H | 100/80-17 |
| Rear Tyre: | MT90-16 | 200/55 ZR 17 (alternative: 190/50 ZR 17; 190/55 ZR17) | 2x P205/65R15 | 140/60-R17 |
| Fuel Capacity: | 13.5 Litres / 3.5 US gal | 17 Liters / 4.4 US gal | 22.7 Litres / 6.0 US gal | 13 Litres / 3.2 US gal |