The Kymco YUP / Sting 50 is a two-stroke, single cylinder motorcycle produced between 2003 and 2007. It has a 49.4 cc capacity engine with a forced air cooling system and a 7.2:1 compression ratio. The ignition is CDI and the bike has a kick start. The YUP model has a maximum power of 4.04 kW / 5.4 hp at 7000 rpm, while the Sting has a speed limit of 2.8 kW / 3.8 hp at 6500 rpm. The clutch is a dry, multi-disc and the transmission is automatic. The bike has a steel tube and pressed steel board frame, hydraulic fork front suspension, and a mono swingarm with an adjustable shock absorber rear suspension. Front brakes consist of a single 220 mm disc with a 2-piston caliper, and rear brakes are an expanding drum. The bike rides on alloy, 3-spoke wheels with a front tyre size of 120/70-12 and a rear tyre size of 130/70-12. The dimensions of YUP / Sting 50 include a length of 1940 mm / 76.4 in, width of 700 mm / 27.6 in, and height of 1120 mm / 44.1 in, with a wheelbase measuring 1296 mm / 51.0 in and a seat height of 828 mm / 32.6 in. Its dry weight is 97 kg / 214 lbs and has a fuel capacity of 5.3 L / 1.4 US gal. The bike is available in light green/silver, light blue/silver, and rose/silver colors.
Technical specifications:
Make Model: Kymco YUP 50 / Sting
| Year | 2003 – 07 |
|---|---|
| Engine | Two stroke, single cylinder |
| Capacity | 49.4 cc / 3.0 cu in |
| Bore x Stroke | 39 x 41.4 mm |
| Cooling System | Forced air cooled |
| Compression Ratio | 7.2:1 |
| Lubrication | Forced lubrication |
| Oil Capacity | 1.3 L / 2.7 US pt |
| Exhaust | 1-into-1 |
| Induction | Keihin VE, 28.8 mm |
| Ignition | CDI |
| Spark Plug | NGK-BR8HSA |
| Battery | 12V, 3AH |
| Starting | Kick start |
| Max Power | YUP: 4.04 kW / 5.4 hp @ 7000 rpm Speed Limit: 2.8 kW / 3.8 hp @ 6500 rpm |
| Max Torque | YUP: 5.6 Nm / 0.57 kgf-m / 3.98 ft lbs @ 6500 rpm Speed Limit: 4.4 Nm / 0.45 kgf-m / 3.24 ft lbs @ 6000 rpm |
| Clutch | Dry, multi-disc |
| Transmission | Automatic |
| Final Drive | Shaft/cardan |
| Frame | Steel tubes and pressed steel boards |
| Front Suspension | Hydraulic fork, 33 mm |
| Front Wheel Travel | 80 mm / 3.1 in |
| Rear Suspension | Mono swingarm with adjustable shock absorber |
| Rear Wheel Travel | 70 mm / 2.8 in |
| Front Brakes | Single 220 mm disc, 2-piston caliper |
| Rear Brakes | Expanding drum |
| Wheels | Alloy, 3-spoke |
| Front Tyre | 120/70-12 |
| Rear Tyre | 130/70-12 |
| Dimensions | Length: 1940 mm / 76.4 in Width: 700 mm / 27.6 in Height: 1120 mm / 44.1 in |
| Wheelbase | 1296 mm / 51.0 in |
| Seat Height | 828mm / 32.6 in |
| Dry Weight | 97 kg / 214 lbs |
| Fuel Capacity | 5.3 L / 1.4 US gal |
| Colours | Light green/silver, Light blue/silver, Rose/silver |
