| MODEL | YAMAHA YZF-600 R6 1999 |
| Year | 1999 |
| Engine Type | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 599 cc / 36.5 cu in |
| Bore X Stroke | 65.5 x 44.5 mm |
| Compression Ratio | 12.4:1 |
| Cooling System | Liquid cooled |
| Max Power | 87.5 kW / 120 hp @ 13000 rpm (73.7 kW / 98.9 hp at the rear wheel @ 12500 rpm) |
| Max Torque | 92.3 Nm / 68.1 lb-ft @ 12000 rpm |
| Ignition | Digital TCI |
| Induction | 4 x 37 mm Keihin CV downdraft |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 6 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Aluminium, twin spar |
| Front Suspension | 43 mm inverted telescopic fork, adjustable preload, compression and rebound damping; 130 mm / 5.1 in travel |
| Rear Suspension | Single shock with piggyback reservoir, adjustable preload, compression and rebound damping; 120 mm / 4.7 in travel |
| Front Brakes | 2 x 298 mm discs, 4 piston calipers |
| Rear Brakes | Single 220 mm disc, 2 piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2024 mm / 79.6 in |
| Overall Width | 691 mm / 27.2 in |
| Overall Height | 1098 mm / 43.2 in |
| Seat Height | 820 mm / 32.3 in |
| Wheelbase | 1380 mm / 54.3 in |
| Ground Clearance | 135 mm / 5.3 in |
| Dry Weight | 169 kg / 373 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 120/60 ZR17 |
| Rear Tyre | 180/55 ZR17 |
| FUEL SYSTEM | |
| Fuel Capacity | 17 Litres / 4.5 US gal |
| Fuel Consumption | — |
| Top Speed | 260 km/h / 161.5 mph |
The 1999 YZF-R6 was Yamaha's new race-replica 600, replacing the Thundercat in the sports class and borrowing ideas from the R1. A compact 16-valve four with R1-style split crankcases, ram-air intake and a short aluminium twin-spar frame gave it a claimed 120 hp and sharp handling. It was the first production 600 four-stroke to exceed 100 hp.
