Forum Archive: Thanks for 15+ years of posts! Boards are now read-only. For mechanical troubleshooting, download official factory manuals here. If yours is missing, let us know. Our team is focusing entirely on improving the parts store to keep riders on the road! Any future maintenance tips, technical news, or occasional short tutorials will be posted directly on our official blog here.
I’ve recently installed a custom made twin pipe (not made by myself) and I’ve been told to upjet the carbs does anyone have any recommendations on what size to upjet too and do I do both carbs or just one and do I do both jets or just one I’m new to these bikes thanks in advance 👏🏼
The recommended jetting is 90 and 92.5 for the 125cc , same goes even for the leovince twin custom pipes made in italy too. Pilot Jets = They stay the same forever.
Go in tutorial section and look for these tutorials
Slide Mod (good mod)
How to remove the intake pipes (very delicate rare parts now!)
How to remove the airbox off the bike a proper way
EBC UK makes em or KeyStar Japan , I may have some in stock (as i keep a few for GT customers upgrading to K&N filters) , send an email. Or any ask any local hyosung dealer such as TNorthEast (one word) online as they are one of the oldest dealers still doing hyo parts, ring them for jets.
Forum Archive: Thanks for 15+ years of posts! Boards are now read-only. For mechanical troubleshooting, download official factory manuals here. If yours is missing, let us know. Our team is focusing entirely on improving the parts store to keep riders on the road! Any future maintenance tips, technical news, or occasional short tutorials will be posted directly on our official blog here.
I’ve recently installed a custom made twin pipe (not made by myself) and I’ve been told to upjet the carbs does anyone have any recommendations on what size to upjet too and do I do both carbs or just one and do I do both jets or just one I’m new to these bikes thanks in advance 👏🏼
The recommended jetting is 90 and 92.5 for the 125cc , same goes even for the leovince twin custom pipes made in italy too. Pilot Jets = They stay the same forever.
Go in tutorial section and look for these tutorials
Slide Mod (good mod)
How to remove the intake pipes (very delicate rare parts now!)
How to remove the airbox off the bike a proper way
EBC UK makes em or KeyStar Japan , I may have some in stock (as i keep a few for GT customers upgrading to K&N filters) , send an email. Or any ask any local hyosung dealer such as TNorthEast (one word) online as they are one of the oldest dealers still doing hyo parts, ring them for jets.