Kymco YUP / Sting 50 (2003-07)

Posted on by

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

Related models: