Gilera 300 Extra (1964-69) vs Gilera Nordcape 600 (1990-) vs Gilera R1 125 (1988-89) vs Gilera Northwest 600 (1991-)
Comparison technical specifications
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| Make: | Gilera | Gilera | Gilera | Gilera |
| Model: | 300 Extra | Nordcape 600 | R1 125 | Northwest 600 |
| Years: | 1964-69 | 1990- | 1988-89 | 1991- |
| Engine: | Four stroke, single cylinder, 2 valves | Four stroke, single cylinder, DOHC, 4 valves | Two stroke, single cylinder, reed valve | Four stroke, single cylinder, DOHC, 4 valves |
| Capacity: | 300 cc / 18.3 cu-in | 558 cc / 34.0 cu-in | 124 ccc / 7.6 cu-in | 558 cc / 34.0 cu-in |
| Bore x Stroke: | 60 x 54 mm | 98 x 74 mm | 56 x 50.5 mm | 98 x 74 mm |
| Cooling System: | Air Cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 7.8:1 | 10.5:1 | 13.0;1 | 10.5:1 |
| Induction: | Carburetor | 40mm Teikei carburetor | 28 Dell'Orto PHBH carburetors | 2X 30mm Teikei E30PV2A |
| Ignition: | 6 Volt | Nippondenso electronic | Electric ignition with capacitive output | Nippondenso electronic |
| Starting: | Kick | Electric & kick | Electric | Electric & kick |
| Max Power: | 10.9 kW / 15 hp @ 8000 rpm | 49.5 hp / 36.5 kW @ 7250 rpm | 29.3 hp / 21.8 kW @ 9900 rpm | 49.5 hp / 36.5 kW @ 7250 rpm |
| Transmission: | 4 Speed | 5 Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Chain |
| Front Suspension: | Hydraulic telescopic forks | 41mm forks | Telescopic forks | 41mmMorzocchi forks 150mm wheel travel |
| Rear Suspension: | Dual chocks | Boge shocks variable preload | Swing arm gas single shock | Boge shocks variable preload |
| Front Brakes: | Drum | 2x 270mm discs 4 piston calipers | Single 240mm disc | 2x 270mm discs 4 piston calipers |
| Rear Brakes: | Drum | Single 240mm disc 2 piston caliper | Drum | Single 240mm disc 2 piston caliper |
| Front Tyre: | 3.00 -17 | 120/60-17 | 2.75-21 | 120/60-17 |
| Rear Tyre: | 3.25 -17 | 160/60-17 | 4.10-17 | 160/60-17 |
| Dry Weight: | 161 Kg / 355 lbs | 115 kg / 253 lbs | 141 kg / 310 lbs | |
| Fuel Capacity: | 19 Litres / 4.2 US gal | 12 Litres / 3.17 US gal |