Gt 125r Throttle problem
- This topic has 8 replies, 3 voices, and was last updated 4 years, 5 months ago by
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My bike starts on choke but when its warmed up and choke of there is no throttle responce when you twist it’s like its bogey then when revs do go up abit it hands there before returning to idel slowly along it feel like front cylinder is very warm any help of what It could be or what to look for thankyou…
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It sounds like a broken throttle cable, check with the engine off that both butterfly valves are moving.
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Thanks will strip it down and give it a good clean
Keep us posted, ultrasonic cleaning (not rattle cans) , really pays off and please only use e5 fuel where possible because e10 just isn’t great. And fancy 2022 cars don’t drive that much better on e10 either, where e5 gives them better mileage & e5 on bikes doesnt go off as quick as e10 does if bike has been stood before you bought. But as simon says , long standing isnt good for carbed bikes anyway.
if you have fuel lines older than 4yrs (oem) , as per service manual please replace them and get fresh fuel filter, the bike will thank you for that.
Carb Jetting is below (to help the main jets pick up better when riding, and slightly rich jets is better for a hot engine so it doesnt lean out full throttle, especially with 125 bikes commonly having aftermarket cans fitted (more air out or in = more fuel in)  (electrics beefed up only help burn the fuel better , eg throttle response is a bit more snappier that’s all but pays off)
See the 2 links here.
[Tutorial] How to swap Carb Main Jets – Hyosung GV & GT 125/250
[Tutorial] How to adjust Carb Slide Needle (Tuning) – Hyosung GV & GT 125/250
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Hi Marcel got the bike reving again ok ot was the pilot jet blocked I did what you said also seen my fuel filter was really old and not it good shape so have ordered a new one of yourself with exhaust nuts thanks again for your help loving the site very useful and informative
Bare with me please for extra 2 days , i must go and get extra nuts before packaging and will send the package to you soon. When you get an email that says “dispatched” , it means i’ve sent it to the postoffice , as i usually do with ebay orders you made with us too. Hold tight before taking exhausts off 🙂
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- This topic has 8 replies, 3 voices, and was last updated 4 years, 5 months ago by .
-
Posts
-
-
My bike starts on choke but when its warmed up and choke of there is no throttle responce when you twist it’s like its bogey then when revs do go up abit it hands there before returning to idel slowly along it feel like front cylinder is very warm any help of what It could be or what to look for thankyou…
-
It sounds like a broken throttle cable, check with the engine off that both butterfly valves are moving.
-
-
-
-
Thanks will strip it down and give it a good clean
Keep us posted, ultrasonic cleaning (not rattle cans) , really pays off and please only use e5 fuel where possible because e10 just isn’t great. And fancy 2022 cars don’t drive that much better on e10 either, where e5 gives them better mileage & e5 on bikes doesnt go off as quick as e10 does if bike has been stood before you bought. But as simon says , long standing isnt good for carbed bikes anyway.
if you have fuel lines older than 4yrs (oem) , as per service manual please replace them and get fresh fuel filter, the bike will thank you for that.
Carb Jetting is below (to help the main jets pick up better when riding, and slightly rich jets is better for a hot engine so it doesnt lean out full throttle, especially with 125 bikes commonly having aftermarket cans fitted (more air out or in = more fuel in)  (electrics beefed up only help burn the fuel better , eg throttle response is a bit more snappier that’s all but pays off)
See the 2 links here.
[Tutorial] How to swap Carb Main Jets – Hyosung GV & GT 125/250
[Tutorial] How to adjust Carb Slide Needle (Tuning) – Hyosung GV & GT 125/250
-
-
Hi Marcel got the bike reving again ok ot was the pilot jet blocked I did what you said also seen my fuel filter was really old and not it good shape so have ordered a new one of yourself with exhaust nuts thanks again for your help loving the site very useful and informative
Bare with me please for extra 2 days , i must go and get extra nuts before packaging and will send the package to you soon. When you get an email that says “dispatched” , it means i’ve sent it to the postoffice , as i usually do with ebay orders you made with us too. Hold tight before taking exhausts off 🙂
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- You cannot reply to this topic.