Kymco YUP / Sting 50 (2003-07)

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.

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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