KTM Comet 125 RS (1976) vs Gilera RC 600C (1992-) vs Suzuki RG 250 Gamma (1985) vs Aprilia RS 125 R Max Biaggi Superbike Replica (2010) vs KTM 690 Duke (2014)
Comparison technical specifications
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| Make: | KTM | Gilera | Suzuki | Aprilia | KTM |
| Model: | Comet 125 RS | RC 600C | RG 250 Gamma | RS 125 R Max Biaggi Superbike Replica | 690 Duke |
| Years: | 1976 | 1992- | 1985 | 2010 | 2014 |
| Engine: | Single cylinder, two stroke | Four stroke, single cylinder, DOHC, 4 valves | Two stroke, parallel twin, reed valve | Single cylinder, two stroke, reed valves induction, aluminium cylinder with Nikasil coated liner | Four stroke, single cylinder, SOHC, 4 valves |
| Capacity: | 124 cc / 7.57 cu in | 558 cc / 34.0 cu-in | 247 cc / 15.1 cu in | 124.8 cc / 7.5 cu in | 690 cc / 42.1 cu in |
| Bore x Stroke: | 54 x 54 mm | 98 x 74 mm | 54 x 54 mm | 54 x 54.5mm | 102 x 84.5 mm |
| Compression Ratio: | 11.8:1 | 10.5:1 | 7.4 :1 | 12.5:1 | 12.6:1 |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Liquid cooled | Liquid Cooled |
| Induction: | Carburetor | 2x 30mm carburetor | 2 x Mikuni VM28SS flat side carburetors | Dell'Orto PHBH 28 carburetor | Generation Keihin EMS with EPT (Electric Power Throttle) |
| Starting: | Kick | Electric | Kick | Electric | Electric |
| Max Power: | 12.4 kW / 17 hp @ 7500 rpm | 53 hp / 39.5 kW @ 7800 rpm | 32.8 kW / 45 hp @ 8500 rpm | 21 kW / 28 hp @ 10500 rpm | 52.2 kW / 70 hp @ 7500 rpm |
| Final Drive: | Chain | Chain | Chain, #520, 110 links, O-ring sealed | 17:40 | Chain X-Ring 5/8 x 5/16" |
| Front Suspension: | Telescopic fork | 41mm Morzocchi forks | Telescopic fork, coil spring, oil dampened with anti-dive | Upside-down forks, Ø 40mm | WP Upside-down forks, 4357 ROMA |
| Rear Suspension: | Twin shocks springs | Boge shocks variable preload | Full Floater, mono-shock, gas/oil damped, spring preload fully adjustable | Monoshock, cast aluminium box section swingarm with asymmetric members | WP monoshock, 4618 with Pro-lever deflector |
| Front Brakes: | Single disc | Single 260mm disc | 2 x 260 mm Discs ,1 piston caliper | Single 320 mm floating discs, 4 piston radial caliper | Single 320 mm floating disc, radially screwed four-piston brake caliper |
| Rear Brakes: | Single disc | Single 220mm disc | Single 210 mm disc, 1 piston caliper | Single 220 mm disc, 2 piston caliper | Single 240 mm floating disc, single piston caliper |
| Front Tyre: | 2.75 x 17 | 90/90 -21 | 100/90-16 | 110/70-17 | 120/70 - ZR17 M/C 58W TL |
| Rear Tyre: | 3.00 x 17 | 130/80 -17 | 100/80-18 | 150/60-17 | 160/60 - ZR17 M/C 69W TL |
| Fuel Capacity: | 9.5 L / 2.5 US gal / 2.1 Imp gal | 12 Litres / 3.17 US gal | 17 Litres / 4.5 US gal / 3.7 Imp gal | 14 Litres / 3.7 US gal | 14 Litres / 3.7 US gal / 3.1 Imp gal |