Jet upgrade.
- This topic has 16 replies, 3 voices, and was last updated 5 months, 2 weeks ago by
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This mod is free and does wonders on the bike!
[Tutorial] How to adjust Carb Slide Needle (Tuning) – Hyosung GV & GT 125/250
Pilots = Size 15 is a good downsize , simply because the factory 17.5 is a bit too big
Mains = Depends what exhaust you have (upload a picture please)
Regards
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There it is, you found another source of power loss , no baffle means the bike will lose too much torque at the lower revs , it has to scream more to get going
I gurantee you. a baffle inside a 125cc will make more power than without , and you can even test this yourself , the vtwins make peak power around 7k-10k rpm (pointless revving past 11k rpm as that’s a sure way to cook the engine)
Measure the hole , and find any baffle that will fit in there, make sure the baffle can be modified so that “gas fumes” exit the bike at a 10p coin size hole (get creative)   (10p coin is 24 mm (0.25 cm approx) yes that small , and it will still hit 70+ if tuned right.
Factory GT125R has an oem exhaust with a lot of restrictions but still managed to do 82mph indicated (ish) , this is factory.  So ignore anyone that advises running without baffle is better (unless they want hearing aids faster lol) , it is still loud baffled on aftermarket cans.
Lextek OP1 and Black Widow FULL Size cans are my recommendations and what i use on all bikes, since they are also road legal & pass MOT with no issues on noises.  Others are HAWK Hyosung Exhausts , 2 Brothers USA (may need baffle!) , MTC UK (baffle it hard) , Scorpion Hyosung Exhaust.
The 1st two i mentioned are just my persona pics.  Hell a full size micron isn’t too bad! – any can is OK as long as it doesn’t fail your MOT & isn’t a “shortie – midget! ” , hyosungs hate midget cans .  Even more so on a GV125 Cruiser (it literally looses like 70% of its power if it senses midget cans added to it) , i had to put the OEM one back for the customer and it’s been happier since.
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- You cannot reply to this topic.
- This topic has 16 replies, 3 voices, and was last updated 5 months, 2 weeks ago by .
-
Posts
-
-
-
This mod is free and does wonders on the bike!
[Tutorial] How to adjust Carb Slide Needle (Tuning) – Hyosung GV & GT 125/250
Pilots = Size 15 is a good downsize , simply because the factory 17.5 is a bit too big
Mains = Depends what exhaust you have (upload a picture please)
Regards
-
-
-
-
-
-
-
-
-
-
-
-
-
There it is, you found another source of power loss , no baffle means the bike will lose too much torque at the lower revs , it has to scream more to get going
I gurantee you. a baffle inside a 125cc will make more power than without , and you can even test this yourself , the vtwins make peak power around 7k-10k rpm (pointless revving past 11k rpm as that’s a sure way to cook the engine)
Measure the hole , and find any baffle that will fit in there, make sure the baffle can be modified so that “gas fumes” exit the bike at a 10p coin size hole (get creative)   (10p coin is 24 mm (0.25 cm approx) yes that small , and it will still hit 70+ if tuned right.
Factory GT125R has an oem exhaust with a lot of restrictions but still managed to do 82mph indicated (ish) , this is factory.  So ignore anyone that advises running without baffle is better (unless they want hearing aids faster lol) , it is still loud baffled on aftermarket cans.
Lextek OP1 and Black Widow FULL Size cans are my recommendations and what i use on all bikes, since they are also road legal & pass MOT with no issues on noises.  Others are HAWK Hyosung Exhausts , 2 Brothers USA (may need baffle!) , MTC UK (baffle it hard) , Scorpion Hyosung Exhaust.
The 1st two i mentioned are just my persona pics.  Hell a full size micron isn’t too bad! – any can is OK as long as it doesn’t fail your MOT & isn’t a “shortie – midget! ” , hyosungs hate midget cans .  Even more so on a GV125 Cruiser (it literally looses like 70% of its power if it senses midget cans added to it) , i had to put the OEM one back for the customer and it’s been happier since.
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- You cannot reply to this topic.