Jet upgrade.

[Brian]

Do the upgraded jets give better acceleration and top speed? Thank you

[♠️ MARCEL]

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

// Meditation doesn't mean you have to sit still....

[Brian]

[Brian]

I have no idea what tyoe if exhaust this is

[Brian]

The guy who I bought the bike from was running 122 main jets, it was carbon fouling alot.

[♠️ MARCEL]

90 & 92.5 is the absolute max and probably the best way.

The bike pulls better with the baffle  (find a way to make the “HOLE” of the baffle about the size of a 10p coin)

// Meditation doesn't mean you have to sit still....

[Brian]

The baffle on this bike is about 2 inches marcel.

[Brian]

Im running the 90/92.5 atm and she runs pretty good, need some fine tuning as still slightly rich

[♠️ MARCEL]

2 inches = Hole Size (where exhaust fumes come out of ?)  or just the side ways length of it ? I was on about the hole size.

// Meditation doesn't mean you have to sit still....

[Brian]

Yes the hole at the end of it lol wasnt me bro

[Brian]

2 inch hole size Marcel

[Brian]

[♠️ MARCEL]

It looks so dark in there, i can’t tell if the baffle is even there , it looks like its baffle-less. ? I could be wrong , take a picture of that hole with camera flash ?

Sorry i delayed.

// Meditation doesn't mean you have to sit still....

[Brian]

There is no baffle

[♠️ MARCEL]

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.

// Meditation doesn't mean you have to sit still....

[Brian]

[Brian]

This is inside Marcel. Previous owner may have removed baffle?

[♠️ MARCEL]

Baffle is missing 👍

// Meditation doesn't mean you have to sit still....

[Author]

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