Gilera R1-S 125 (1990-) vs Gilera MX-1 125 (1988) vs Gilera Nordwest 350 (1991) vs Gilera KZ 125 (1988-89)
Comparison technical specifications
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| Make: | Gilera | Gilera | Gilera | Gilera |
| Model: | R1-S 125 | MX-1 125 | Nordwest 350 | KZ 125 |
| Years: | 1990- | 1988 | 1991 | 1988-89 |
| Engine: | Two stroke, single cylinder, reed valve | Two stroke, single cylinder, reed valve | Four stroke, single cylinder, DOHC, 4 valves | Two stroke, single cylinder, reed valve |
| Capacity: | 124 ccc / 7.6 cu-in | 124 ccc / 7.6 cu-in | 348.8 cc / | 124 ccc / 7.6 cu-in |
| Bore x Stroke: | 56 x 50.5 mm | 56 x 50.5 mm | 80 x 69.4 mm | 56 x 50.5 mm |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 13.0;1 | 13.0;1 | 9.5:1 | 13.0;1 |
| Induction: | 28 Dell'Orto PHBH carburetors | 28 Dell'Orto PHBH carburetors | 2x 25mm Dell'Orto carburetor | 28 Dell'Orto PHBH carburetors |
| Ignition: | Electric ignition with capacitive output | Electric ignition with capacitive output | CDI | CDI |
| Max Power: | 29.3 hp / 21.8 kW @ 9900 rpm | 29.3 hp / 21.8 kW @ 9900 rpm | 24 kW / 33ho @ 7500 rpm | 29.3 hp / 21.8 kW @ 9900 rpm |
| Transmission: | 6 Speed | 6 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Chain |
| Front Suspension: | Telescopic forks | 35mm Marzocchi telescopic-hydraulic forks | 41mm Telescopic forks, | Fork traditional 36mm. Antidive adjustable |
| Rear Suspension: | Swing arm gas single shock | Fork in die cast aluminium, Boge single shock absorber fork in die cast aluminium, Boge single shock absorber | "Power Drive" monoshock | Hydraulic shock absorber adjustable in spring preload Court Cosso |
| Front Brakes: | Single 240mm disc | Single 260mm disc | 2x 270mm discs | Single 240mm disc 2 piston caliper |
| Rear Brakes: | Drum | Single 240mm disc | Single 240mm disc | Single 240mm disc |
| Front Tyre: | 2.75-21 | 100/90-16 | 120/60-17 | 100/80-16 |
| Rear Tyre: | 4.10-17 | 120/80-16 | 160/60 -17 | 120/80-16 |
| Fuel Capacity: | 17 Litres / 4.5 US gal | 12 Litres / 3.17 US gal |