2018 Hyosung ST 700i Technical Analysis & Specification Breakdown
At the heart of the 2018 Hyosung ST 700i custom - cruiser motorcycle, Hyosung pairs a 678.2 cc (41.4 cu in) liquid-cooled v2, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 63 HP (46 kW) at 8,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and belt final drive. With a specific output of 92.9 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the ST 700i measures 244 kg (538 lbs) dry, translating to a power-to-weight ratio of 0.26 HP/kg (3.87 kg per horsepower). Rider ergonomics and chassis geometry center around a 675 mm (26.6 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,690 mm (66.5 in) wheelbase engineered for planted straight-line stability. The 17-liter (4.5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 180 km/h (112 mph).
Within MotoLibrary's Hyosung archive, this model family spans 2 indexed model years from 2018 to 2019, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
92.9 HP/L
Power-to-Weight
0.26 HP/kg (3.87 kg/HP)
Standover Height
675 mm (26.6 in)
Engine
Displacement678.2 ccm (41.38 cubic inches)
Engine TypeV2, four-stroke
Power63.0 HP (46.0 kW)) @ 8000 RPM
Compression11.5:1
Bore x Stroke81.5 x 65.0 mm (3.2 x 2.6 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
LubricationWet sump
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveBelt (final drive)
ClutchWet, Multiplate
Performance
Top Speed180.0 km/h (111.8 mph)
Chassis
Front SuspensionTelescopic fork
Rear SuspensionSwing arm with Hydraulic Double shock absorber
Wheelbase1690 mm (66.5 inches)
Wheels & Brakes
Front Tyre120/80-16
Rear Tyre170/80-15
Front BrakesSingle disc
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc
Rear Brake Ø270 mm (10.6 inches)
Dimensions & Weight
Dry Weight244.0 kg (537.9 pounds)
Power/Weight0.2582 HP/kg
Seat Height675 mm (26.6 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
