Yamaha RD 500LC / RZV500 / RZ 500 (1985) vs Aprilia SX 125 (2012-)
Comparison technical specifications
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| Make: | Yamaha | Aprilia |
| Model: | RD 500LC / RZV500 / RZ 500 | SX 125 |
| Years: | 1985 | 2012- |
| Engine: | Two stroke, 50°-V4 cylinder, reed valve, YPVS | Two stroke, single cylinder Aluminium cylinder with Nikasil coated liner. Read valve intake. Separate mixing. Homologated to Euro 3 standard. |
| Capacity: | 499 cc / 30.3 cu-in | 125 cc / 7.6 cu-in |
| Bore x Stroke: | 56.4 x 50 mm | 54 x 54.5 mm |
| Cooling System: | Liquid cooled | Liquid cooled |
| Compression Ratio: | 6.6 :1 | 12.5:1 |
| Induction: | 4x 26mm Mikuni carburetors | Dell’Orto VHST 28 |
| Ignition: | Digital CDI | Electronic CDI |
| Starting: | Kick | Kick |
| Max Power: | 88 hp / 63.9 kW @ 9500 rpm | 16.4 kW / 22 hp |
| Max Torque: | 6.57 Nm / 6.9 kgf-m @ 8500 rpm | 16.0 Nm / 1.6 kgf-m / 11.8 ft-lb |
| Transmission: | 6 Speed | 6 Speed |
| Final Drive: | Chain | Chain |
| Gear Ratio: | 1st 2.250 2nd 1.685 3rd 1.363 4th 1.166 5th 1.043 6th 0.960 | 1st 10:30 / 2nd 14:29 / 3rd 17:27 / 4th 19:25 / 5th 21:23 / 6th 22:21 |
| Frame: | Steel twin downtube | High strength steel frame with double trellis beam and double cradle. Separate seat frame. |
| Front Suspension: | 37mm Air assisted telescopic forks, 4-way spring preload adjustable and anti-dive variable. | Upside down telescopic fork, Ø40 mm |
| Front Wheel Travel: | 140 mm / 5.5 in | 260 mm / 10.2 in |
| Rear Suspension: | Monoshock, spring preload and rebound damping, | Steel swingarm. Hydraulic monoshock with piggy back cylinder |
| Rear Wheel Travel: | 120 mm / 4.7 in | 270 mm / 10.6 in |
| Front Brakes: | 2x 267mm discs 2 piston calipers | Single 260 mm disc, sliding 2 piston caliper, Brembo |
| Rear Brakes: | Single 245mm disc 2 piston calliper | Single 220 mm disc, sliding 1 piston caliper |
| Front Tyre: | 120/80 V16 + | 110/70 17 |
| Rear Tyre: | 130/80 V18 | 150/60 17 |
| Seat Height: | 780 mm / 30.7 in | 870 mm / 34.3 in |
| Dry Weight: | 180 kg / 437.8 lbs | 115 kg / 254 lbs |
| Fuel Capacity: | 22 Litres / 5.8 gal | 10 Litres / 2.6 US gal |
| Top Speed: | 148 mph / 238 km/h | 132 km/h / 82 mph |