Duel RS4 Vs YZF-R125: the return to full six !
With all due respect to purists, the reign of 125 4-stroke sports motorcycles is now established. We therefore organized a duel between the two sharpest representatives of this category: the new Aprilia RS4 and the Yamaha YZF-R125…. Duel 125 !
Aprilia RS4 125 tech. Sheet
| Engine | |
| Type | single cylinder in-line, 4-stroke, dual ACT and 4 valves |
| Cooling | By water |
| Displacement | 124.8 cc |
| Bore x stroke | 58 x 47 mm |
| Volumetric ratio | 12.5: 1 |
| Max power | 15 hp at 9,250 rpm |
| Max torque | 11 Nm at 8,500 rpm |
| Injection | Magneti Marelli MIU G3 electronics |
| Injector body | 32 mm |
| Lubrication | Wet sump |
| Electrical system | |
| Ignition | Digital transistorized |
| Start-up | Electric |
| Alternator | 13 V – 235 W |
| Transmission | |
| Clutch | Multi-disc in oil bath |
| Training | Mechanical by cable |
| Box | 6 gears in constant mesh |
| Primary report | Per sprocket cascade: 73/24 (3.04) |
| 1st | 11/33 (0.33) |
| 2nd | 15/30 (0.50) |
| 3rd | 18/27 (0.67) |
| 4th | 20/24 (0.83) |
| 5th | 25/27 (0.92) |
| 6th | 23/22 (1.05) |
| Final drive | Per chain: 49/14 (3.50) |
| Cycle part | |
| Frame | Aluminum perimeter frame |
| Front suspension | Telescopic fork ø 41 mm |
| Suspension Ar | Asymmetrical swingarm, monoshock shock absorber |
| Front travel | 110 mm |
| Travel Ar | 130 mm |
| Front rim | 17 x 2.75 " |
| Rim Ar | 17 x 3.5 " |
| Front tire | 110 / 80-17 M / C |
| Tire Ar | 130/70-ZR17 M / C |
| Front brake | Single hydraulic disc ø 300 mm with 4 piston calipers |
| Ar brake | Single hydraulic disc ø 218 mm with single piston caliper |
| Dimensions, weight, capacities | |
| Length | 1,953 mm |
| Width | 740 mm |
| Height | 1138 mm |
| Wheelbase | 1350 mm |
| Saddle height | 820 mm |
| Fuel tank | 14.5 liters (including 3.5 l reserve) |
| Weight in running order | 134 kg (without gasoline) |
| Commercial information | |
| Availability | Immediate () |
| Price | € 4,199 |
| Guarantee | 2 years, parts and labor |
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