HyosungDiscontinuedmotorcycleCruiser678 cc

Hyosung ST7

The Hyosung ST7 is a discontinued 678.2 cc air-cooled motorcycle with a 5-speed gearbox. BikeDekho and BikeWale list 57.6 bhp @ 8000 rpm maximum power and 57 Nm @ 6000 rpm maximum torque. It has a 17.7 L fuel tank and a 244 kg kerb weight.

Engine
678 cc
Max power
57.6 bhp @ 8000 rpm
Max torque
57 Nm @ 6000 rpm
Claimed mileage
18 Kmpl (ARAI-certified, per BikeDekho)
Fuel tank
17.7 L
Kerb weight
244 kg

About the Hyosung ST7

Overview

The Hyosung ST7 is a cruiser motorcycle from Hyosung. It has been discontinued. Mechiee still services it at your doorstep. Cruisers are built for relaxed riding, typically with a low seat, a laid-back posture and an engine that pulls from low revs. With a 678 cc engine it sits in the middleweight 450–800 cc class.

Engine and performance

Power comes from a 678 cc twin-cylinder air-cooled fuel-injected engine that makes 57.6 bhp at 8,000 rpm and 57 Nm of torque at 6,000 rpm. Its bore is wider than its stroke (81.5 mm x 65 mm), a short-stroke layout that generally favours higher revs. Divide power by kerb weight and it has about 239 PS per tonne; by that measure, it is lively, with easy overtakes and relaxed highway speeds. The claimed top speed is 175 km/h. It has electric start.

Gearbox

It has a 5-speed manual gearbox, and a belt carries drive to the rear wheel. It uses a wet multi-plate clutch.

Chassis, brakes and tyres

Its frame is steel, double cradle frame. Suspension is by telescopic forks at the front and hydraulic double shock absorber at the rear. Braking is by a disc at the front and a disc at the rear. It rides on 16-inch front and 15-inch rear alloy wheels with tubeless tyres — 120/80 - 16 60W at the front and 170/80 - 15 77W at the rear.

Size, comfort and range

The seat is 675 mm off the ground, which is low and makes it easy to put your feet down. It weighs 244 kg ready to ride, which is heavy, so parking and tight U-turns need care. Ground clearance is 155 mm — adequate, though tall speed breakers need care. It is 2,470 mm long, with 1,690 mm between the axles. Its 17.7 L fuel tank and claimed mileage of 18 Kmpl work out to roughly 319 km per tankful on paper; real-world range is usually lower.

Features and equipment

Equipment includes distance-to-empty readout.

Owning one

The manufacturer's warranty is 2 years or 25,000 km. For the Hyosung ST7, Mechiee offers a fixed ₹4,499 doorstep service.

Who it suits

It is best suited to relaxed riding and unhurried weekend trips. Its low seat also makes it approachable for shorter and newer riders.

Care notes for this model

Its belt drive needs no lubrication, only periodic checks for wear and tension.

Hyosung ST7 specifications

These figures are listed by independent publications; where they overlap, they agree. Exact values can differ slightly by variant and model year.

Engine & performance

Displacement
678 cc
Configuration
4 Stroke, DOHC 8 Valve 90 Degrees, V-Twin 678.2 CC, Water Cooled
Cooling
Air Cooled
Fuel system
Fuel Injection
Ignition
Digital CDI
Starting
Self Start Only
Maximum power
57.6 bhp @ 8000 rpm
Maximum torque
57 Nm @ 6000 rpm
Claimed mileage
18 Kmpl (ARAI-certified, per BikeDekho)
Top speed
175 km/h
Transmission
5 Speed
Gears
5-speed
Clutch
Wet, Multi-Plate
Final drive
Belt Drive
Bore x stroke
81.5 mm x 65 mm
Compression ratio
11.5 +/- 0.1:1
Cylinders
2
Valves per cylinder
4

Dimensions & capacity

Length
2470 mm
Width
960 mm
Height
1135 mm
Wheelbase
1690 mm
Ground clearance
155 mm
Seat height
675 mm
Kerb weight
244 kg
Fuel tank
17.7 L
Fuel reserve
4 Ltrs

Brakes, suspension & tyres

Front brake
Disc
Rear brake
Disc
Front suspension
Telescopic
Rear suspension
Hydraulic Double Shock Absorber
Front tyre
120/80 - 16 60W
Rear tyre
170/80 - 15 77W
Wheels
Alloy
Tyre type
Tubeless

Chassis & frame

Frame type
Steel, Double Cradle Frame

Electricals

Battery
12v /12Ah
Headlamp
55wBulb and Reflector Type
Tail lamp
LED

Features & technology

  • Distance-to-empty readout

Sources: BikeDekho, BikeWale, Bikesmedia

Specifications last checked:

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Owning the Hyosung ST7

  • Claimed mileage

    18 Kmpl (ARAI-certified, per BikeDekho)

    Manufacturer's claimed figure; real-world mileage is usually lower.

  • Estimated range

    about 319 km

    Claimed mileage × tank size. An estimate, not a promise.

  • Manufacturer warranty

    2 Years or 25,000 Km

    Terms and conditions apply.

  • Mechiee doorstep service

    ₹4,499

    Mechiee's fixed doorstep service price for this model.

Maintaining the Hyosung ST7

  • Routine servicing

    Follow the schedule in the owner's manual for your exact variant and year. A regular service is the cheapest way to catch small problems before they become expensive ones.

  • Engine oil & filter

    Engine oil is the single most important consumable to keep fresh. Top up between services if the level drops, and change it on schedule.

  • Brake inspection

    With Disc and Disc brakes, check pad or shoe wear, lever and pedal free play, and braking feel at every service.

  • Chain cleaning & lubrication

    A clean, correctly tensioned and lubricated chain lasts longer and wastes less power. Check slack regularly, especially after riding in rain or dust.

  • Air filter & spark plug

    A clogged air filter or worn spark plug shows up as hard starting, weak throttle response and poorer fuel economy. Both are checked at a regular service and replaced when worn.

  • Disc brake fluid

    Brake fluid absorbs moisture over time, which lowers its boiling point. Have its level and condition checked and change it on the interval in the owner's manual.

  • Tyre inspection

    This bike runs 120/80 - 16 60W / 170/80 - 15 77W tyres. Check pressure, tread depth and sidewalls, and replace tyres that are worn or cracked.

  • Battery & electricals

    The battery is listed as 12v /12Ah. Weak starting, dim lights or a flickering console are early signs the battery or charging system needs a look.

Mechiee service

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Compare with similar Hyosung bikes

Manufacturer figures for each bike. A dash means the value is not published in our sources.

SpecificationHyosung ST7Hyosung GT650NHyosung GT650RHyosung GT250R
Engine678 cc647 cc647 cc249 cc
Max power57.6 bhp @ 8000 rpm72.68 bhp @ 9,000 rpm72.68 bhp @ 9,000 rpm27.61 bhp @ 10,000 rpm
Max torque57 Nm @ 6000 rpm60.9 Nm @ 7,500 rpm60.9 Nm @ 7,500 rpm22.07 Nm @ 8,000 rpm
Claimed mileage18 Kmpl (ARAI-certified, per BikeDekho)———
Gears5-speed6-speed6-speed5-speed
Kerb weight244 kg208 kg215 kg188 kg
Fuel tank17.7 L17 L17 L17 L
Front brakeDiscDiscDiscDisc
Rear brakeDiscDiscDiscDisc

Hyosung ST7 specs explained

What the technical terms on this page mean.

OHC / SOHC / DOHC
How the engine's valves are operated. OHC and SOHC mean one overhead camshaft; DOHC means two, which usually allows higher revs and more power from the same size.
Fuel injection
Petrol is delivered by an electronically controlled injector instead of a carburettor, which helps with easy starting and steady fuel economy.
Air cooling
The engine is cooled by air flowing over its fins. It is simpler and needs no coolant, which keeps upkeep straightforward.
Tubeless tyres
Tyres with no inner tube. A small puncture usually loses air slowly, which makes roadside repair easier.
Kerb weight
The weight of the bike ready to ride, with its fluids and fuel, but without a rider or luggage.
Bore x stroke
The cylinder's width and the piston's travel. A larger bore relative to stroke tends to favour revs; a longer stroke tends to favour low-speed pull.
Compression ratio
How much the fuel-air mixture is squeezed before it is ignited. It is one of the factors behind an engine's efficiency and power.

Frequently Asked Questions

The Hyosung ST7 has a 678 cc engine, described as 4 stroke, dohc 8 valve 90 degrees, v-twin 678.2 cc, water cooled.

The Hyosung ST7 is rated at 57.6 bhp @ 8000 rpm maximum power and 57 Nm @ 6000 rpm maximum torque.

The claimed figure for the Hyosung ST7 is 18 Kmpl (ARAI-certified, per BikeDekho). Real-world mileage is usually lower and depends on riding style, load, road and traffic conditions and how well the bike is maintained.

The Hyosung ST7 has Disc at the front and Disc at the rear.

The Hyosung ST7 runs 120/80 - 16 60W at the front and 170/80 - 15 77W at the rear on alloy wheels.

Follow the service schedule in the owner's manual for your exact variant and year. Between services, keep an eye on engine oil, chain, tyres and battery. With Disc and Disc brakes, brake wear and adjustment are worth checking at every visit.

Multiplying the claimed 18 Kmpl (ARAI-certified, per BikeDekho) by the 17.7 L tank gives roughly 319 km on a full tank. That is an estimate from claimed figures; real-world range is usually lower.

The manufacturer states a warranty of 2 Years or 25,000 Km. Terms and conditions apply.

No. The Hyosung ST7 has been discontinued. Mechiee still lists doorstep servicing for it.

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