Carburetor issues? Need help – Hyosung GV250
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Bike Model = : Gv250
Bike starts and idles good but when riding falls on its face in second gear. Tops out in fourth about 40mph that’s full throttle had carbs off numerous times first time was filthy all jets were plugged. Cleaned them out gave carbs ultrasonic bath put back together runs little better but still falls on its face. Need help please
Nathan Archer
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Hmm,
– This appears to be carb related or the bike is being “choked on a leash” for some reason.Can we confirm what size jets are on your bike both Pilots and Mains ?
And turn your mixtures downwards (clockwise until they stop) – — COUNT the number of full turns. It’s important, then go back to how it was.
Ie. Front is 3.5 full turns OUT  and  Rear is 3.75 (3 and 3/4) turns OUT , so we can assess the mixtures.
Confirm:
– Are pod filters being used?
– Cracks on the rubber pipes holding carbs to engine heads
– new air filter?
– CR8E new plugs  (if CR7 or CR9 = bin them) (If “IX” branded plugs = bin them , use stock CR8E or CR8E LASER) and beware of fake NGK’s .Electrical = Do these tests below and report back to this topic with your figures:
Rectifier – How to Test Stator , Battery , Regulator – GT125R Carby
If we get more indepth , we can find out what the bottle neck was.
Engine (last war)
– Compression test
– Leak test (little o-rings inside the rubber pipes can cause all kinds of issues , so advised to get fresh ones)
– Slipping clutch?
– Valve Clearances  (too tight = lower speeds) or too loose (lower power)
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