Hyosung GT125 Comet & GT125R Specifications
(from 2009/2010)

Model: Hyosung GT125R / GT125 Comet
Years: Since 2009 (new models)
Category: Sports
Changes / Features over the years:  From 2009, the GT125 family of bikes had a full facelift , all new black engines – In fact side casings are a little lighter than previous grey models.  Black forks on GTR became the standard colour,  GT & GTR had a new shock update.
Also known as: GTR , GT, Comet R Supersport, Comet Naked   (GTP / GT-RC)
Engine and transmission
Displacement: 125
Engine type: Air / Oil cooled DOHC 8-valve 75° V-twin
Power: 14.2 hp (11 kW) @10,500 rpm
Top speed: 75-80mph (avg)
Bore x stroke: 44 x 41
Valves per cylinder: 4
Fuel system: Mikuni Carburetor
Lubrication Type
Wet sump oil
Ignition: Controlled by EDGETEK CDI
Cooling system:  Oil Cooler & Air Cooling
Compression Ratio: 11.3 : 1
Fuel consumption: 50-60 mpg average (reported)
Final Drive / Gearbox: Constant mesh, Close ratio 5-speed (1down 4up)
+ Chain
Chassis, suspension, brakes and wheels
Frame type:  
Suspension (Front): Upside Down Forks = GTR
Standard Silver Forks = GT
Rear suspension: Dual side Aluminum Swing arm with Gas charged Hydraulic mono-shock
Front tyre: 110/70 R17 54H
Rear tyre: 150/70 -17 69H
Front brakes: Semi floating single disc, 2 pistons caliper
Front brakes diameter: 300mm
Rear brakes: Petal shaped single disc, 2 piston caliper & Stainless hose
Rear brakes diameter: 230 mm
Other Details
Dry weight: 128 kg
Wet Weight:
Max Torque: 10.20Nm / @9750RPM
Seat height: 810mm
Height: 1130mm
Length: 2090mm
Width: 700mm
Ground clearance: 155mm
Wheelbase: 1435mm
Fuel capacity: 17 Litres
Color options: Red / White / Black / 2-Tone Models /
Hyosung GT & GTR 125 Specifications :: Resources
Technical Help
🚥 Hyosung Community Forums->Technical Help
Parts finder 🛍 HyoRiders Shop – Aftermarket Parts & Accessories + Request



🚥 Parts Request – See below also for local dealers your bike too.

🚚 UK Dealers/Vendors – Community -> Dealers/Vendors

📥 Hyosung Owners Manual – Plus Service WorkShop Books

Hyosung GT125+R Community
🚥 HyoRiders Owners Club – Pictures, Owners Discussions & Technical Resources (manuals & service books)

More Bike Specs & Industry News = KR.Motors

This page is subject to constant updates, if we missed anything about this bike, let us know in the forums! or write comments below.