Gilera KZ 125 (1988-89) vs Yamaha SR 500 (1974-75) vs Triumph America (2017-18) vs Triumph Street Triple 765RS (2019)
Comparison technical specifications
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| Make: | Gilera | Yamaha | Triumph | Triumph |
| Model: | KZ 125 | SR 500 | America | Street Triple 765RS |
| Years: | 1988-89 | 1974-75 | 2017-18 | 2019 |
| Engine: | Two stroke, single cylinder, reed valve | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder, 360° firing interval | Four stroke, in-line 3-cylinder, DOHC, 4 valve per cylinder |
| Capacity: | 124 ccc / 7.6 cu-in | 499 cc / 30.4 cu-in | 865 cc / 52.8 cub in. | 765 cc / 46.6 cu-in |
| Bore x Stroke: | 56 x 50.5 mm | 87 х 84 mm | 90 x 68 mm | 78 x 53.4 mm |
| Cooling System: | Liquid cooled | Air cooled | Air-cooled | Liquid-cooled |
| Compression Ratio: | 13.0;1 | 9.0:1 | 9.2:1 | 12.65:1 |
| Induction: | 28 Dell'Orto PHBH carburetors | 34mm Mikuni VM34SS carburetor | Twin carburettors, with throttle position sensor and electric carburettor heaters | Multipoint sequential electronic fuel injection with SAI. Electronic throttle control |
| Ignition: | CDI | CDI | Digital | Digital - inductive type |
| Starting: | Electric | Kick | Electric | Electric |
| Max Power: | 29.3 hp / 21.8 kW @ 9900 rpm | 31.5 hp / 23.5 kW @ 6500 rpm | 45.5 kW / 61 hp @ 6800 rpm | 121 hp / 90 kW @ 11,700rpm |
| Max Torque: | 18 Nm / 13.2 lb-ft @ 10250 rpm | 36.3 Nm / 26.8 lb-ft @ 5500 rpm | 72 Nm / 7.34 kgf-m / 53.1 ft-lb @ 3300 rpm | 56.8 lb-ft / 77 Nm @ 10,800 rpm |
| Transmission: | 6 Speed | 5 Speed | 5 Speed | 6 Speed, close ratio |
| Final Drive: | Chain | Chain | Chain, X-ring | O ring chain |
| Frame: | Diagonal double cradle tubular steel | Half-duplex cradle | Tubular steel cradle, swing arm: twin-sided, tubular steel | Front – Aluminium beam twin spar. Rear – 2 piece high pressure die cast |
| Front Suspension: | Fork traditional 36mm. Antidive adjustable | 35mm telescopic forks | 41mm Kayaba telescopic forks, polished stainless steel shrouds | Showa 41 mm upside down big piston forks (BPF). Adjustable compression damping, rebound damping and preload. |
| Rear Suspension: | Hydraulic shock absorber adjustable in spring preload Court Cosso | Dual shock, 5-way adjustable spring preload. | Kayaba chrome spring twin shocks with adjustable preload | Öhlins STX40 piggyback reservoir monoshock. Adjustable spring preload (lock-rings), compression damping and rebound damping |
| Front Brakes: | Single 240mm disc 2 piston caliper | Single 200mm disc | Single 310 mm disc, Nissin 2 piston floating caliper | 2 x 310 mm floating discs, Brembo M50 4-piston radial monobloc calipers |
| Rear Brakes: | Single 240mm disc | 150mm drum | Single 285 mm disc, Nissin 2 piston floating caliper | Single 220 mm fixed disc, Brembo single piston sliding calliper |
| Front Tyre: | 100/80-16 | 3.50 S19 | 130/90 - 16 | 120/70 ZR17 Pirelli Diablo Supercorsa SP |
| Rear Tyre: | 120/80-16 | 4.00 S18 | 170/80 B15 | 180/55 ZR17 Pirelli Diablo Supercorsa SP |
| Seat Height: | 760 mm / 29.9 in | 810 mm / 32 in | 690 mm / 27.2 in | 825 mm / 32.4 in |
| Fuel Capacity: | 12 Litres / 3.1 US gal | 19.3 Litres / 5.1 US gal / 4.2 Imp gal | 17.4 Litres / 4.6 US gal / 3.8 Imp gal |