Hyosung GD250R

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Hyosung GD250R

Make Model.	Hyosung GD250R
Year	2017 - 18
Engine	Single cylinder, DOHC, 4 valves
Capacity	249 cc / 15.2 cu in
Bore x Stroke	73 x 59.6 mm
Compression Ratio	12:1
Cooling System	Liquid cooled
Lubrication System	Wet sump
Induction	Electronic fuel injection
Ignition	Electronic
Starting	Electric
Max Power	21.2 kW / 28.4 hp @ 8500 rpm
Max Torque	26.1 Nm / 2.56 kgf-m / 19.25 ft-lb @ 7000 rpm
Clutch	Wet, multiplate
Transmission	6-Speed, close ratio, constant mesh
Final Drive	Chain
Frame	Tubular steel trellis perimeter frame
Front Suspension	37 mm Inverted telescopic hydraulic fork
Rear Suspension	Twin sided swingarm, gas charged hydraulic single shock, nonstep preload adjustable
Front Brakes	300 mm Single disc, 4 opposed piston caliper
Rear Brakes	230 mm Single disc, 2 opposed piston caliper
Front Tyre	110/70-R17 54S
Rear Tyre	150/60-R17 66S
Rake	23.5⁰
Trail	93.6 in / 3.7 in
Dimensions	Length: 1937 mm / 76.3 in Width: 700 mm / 27.6 in Height: 1100 mm / 43.3 in
Wheelbase	1346 mm / 53.0 in
Ground Clearance	135 mm / 5.3 in
Seat Height	790 mm / 31.1 in
Wet Weight	160 kg / 352 lbs
Fuel Capacity	11 L / 2.9 US gal / 2.4 Imp gal

The GD250 is a lightweight, nimble street bike allowing all riders (beginners and experienced) to experience the true essence of sport riding.

Features and benefits:

Z-suit system. (Switchable riding position to suit various lifestyles.)
Super sports position
- Focus on sports riding.
- Excellent controllability.

Street sports position

- Focus on daily street riding.
- Excellent accessibility.

Layout (Mass centralization - to the center of gravity of vehicle)
- Engine is located near in the steering head.
- Fuel tank is located near in the COG.
- Muffler is located below the swingarm pivot.
- Electric equipment unit is located near in the steering head.

Frame

- X-5's steel tubular trellis frame is designed to connect directly between the steering head and pivot. Its compact size reduces weight while enhancing the rigidity of the frame.
- X-5 is equipped with a long 553mm swingarm coupled with the short 1340mm wheelbase.
These features combine to provide a dynamic steering characteristic and constant movement of the suspension.

Muffler

- Silencer located below the swingarm pivot which improves mass centralization.
Centralized muffler having optimized center of gravity gives X-5 more active handling.

Fuel tank
- Fuel tank located near in the COG. which improves weight centralization.
- Fuel tank is tilted toward swingarm pivot, the fuel always gathers around the center of gravity. This feature provides natural steering character by reducing the amount of front / rear weight transfer.
- Fuel tank is made from plastic for weight reduction.

Brakes

- Front: Ø 300mm single disc, opposed 4 piston caliper.
- Rear: Ø 230mm single disc, opposed 2 piston caliper.

Suspension

- Front: Ø 37mm upside down telescopic fork (120mm travel)
- Rear: Dual side Aluminum Swing arm with Gas charged Hydraulic shock absorber (Nonstep Preload adjustable)
- The monocross shock absorber is laterally mounted because this solution frees up space to the centrally located fuel tank, allowing perfectly symmetrical weight distribution. The lateral shock absorber is pivoted directly on the swingarm.

Electric equipment unit box

- Electric equipment unit box is located at the top of the cylinder head. It contains battery, ECU, relay, fuse, regulator, sensor, etc.
- This unit construction improves maintainability while reducing weight by shortening the harness and reducing the number of brackets.