Motorcycle won't run – GT125R Comet 2007
- This topic has 3 replies, 3 voices, and was last updated 6 years, 9 months ago by
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Hi, i have this problem with my hyosung that, if i travel at 100 km/h in about 5-10 minutes the bike starts dying, almost as it dosen’t have enough fuel. if i press in the clutch as this happens, the bike dies, and i have difficulties starting it up again. i think maybe it is the fuel pumps fault. i ride a Hyosung GT125R comet 2007 model, carburated, so the fuel pump goes on vacuum. does any one know if i it is the fuel pumps fault? or something else? thanks for SERIOUS replies
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Moved to “Technical”.
If you also go for a fast sprint, then all of a sudden the bike comes to a halt.  Attack these below:
– Fuel Pump (open it, check for dirt)
– Clogged Carbs (plugs will look glazed white if its too lean to run top gear all the time)
– Because of leaning running (i hope not), the plugs will go as hot as they can then they slow the bike down by force.
– Check that floats are 7mm tall , crucial for everything. (Carb will be upside down on table & measure float height)
– Check vacuum system is tight and good (Intake O Rings, Intake Pipes,  Vacuum Lines)
(makes it very hard to start 125cc Hyosungs with air leaks)
– If you filter is old, consider changing it, it may reduce fuel flow if its bad.Let’s try these , before attacking anything else on the bike. Good luck and let us know.
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Thank you for all the helpful tips! i have already checked the carb and fuel pump, i have also replaced the fuel filter. i haven’t checked all the vacuum lines, so there might be a leak somewhere. i’ll be sure to check that as well.
Thanks again for the help, i’ll be sure to let you know if it worked đ
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- This topic has 3 replies, 3 voices, and was last updated 6 years, 9 months ago by .
-
Posts
-
-
Hi, i have this problem with my hyosung that, if i travel at 100 km/h in about 5-10 minutes the bike starts dying, almost as it dosen’t have enough fuel. if i press in the clutch as this happens, the bike dies, and i have difficulties starting it up again. i think maybe it is the fuel pumps fault. i ride a Hyosung GT125R comet 2007 model, carburated, so the fuel pump goes on vacuum. does any one know if i it is the fuel pumps fault? or something else? thanks for SERIOUS replies
-
-
Moved to “Technical”.
If you also go for a fast sprint, then all of a sudden the bike comes to a halt.  Attack these below:
– Fuel Pump (open it, check for dirt)
– Clogged Carbs (plugs will look glazed white if its too lean to run top gear all the time)
– Because of leaning running (i hope not), the plugs will go as hot as they can then they slow the bike down by force.
– Check that floats are 7mm tall , crucial for everything. (Carb will be upside down on table & measure float height)
– Check vacuum system is tight and good (Intake O Rings, Intake Pipes,  Vacuum Lines)
(makes it very hard to start 125cc Hyosungs with air leaks)
– If you filter is old, consider changing it, it may reduce fuel flow if its bad.Let’s try these , before attacking anything else on the bike. Good luck and let us know.
-
Thank you for all the helpful tips! i have already checked the carb and fuel pump, i have also replaced the fuel filter. i haven’t checked all the vacuum lines, so there might be a leak somewhere. i’ll be sure to check that as well.
Thanks again for the help, i’ll be sure to let you know if it worked đ
-
- You cannot reply to this topic.