Forums ๐ฅ PIT STOP ๐ง Hyosung Technical Help Bigger main jets upgrade size for gt125r 2015 Tagged: main jet size, upgrade main jets This topic has 2 replies, 2 voices, and was last updated 1 year ago by Josh D. Viewing 1 reply thread Author Posts Dec 16, 2019 at 10:37 PM #3601 Josh DMember Topics: 4Replies: 4Joined: Dec 16, 2019@joshhyogt125r2015 North walesHyosung GT125R 2015 I have ordered an after market exhaust end can, and just need help finding what size main jets should i get. I am thinking i would need front:90 rear:92.5 main jets. mine has the stock ones which are front:87.5 and rear:90. Dec 16, 2019 at 10:47 PM #3602 โ ๏ธ MARCELAdministrator Topics: 38Replies: 423Joined: Dec 16, 2019@mf448kxn6 North UKGTR Moved to Technical. Yes you are correct for the 125 it is 90 front and 92.5 rear as an upgrade.๐ More about that here [Tutorial] How to swap Carb Main Jets – Hyosung GV & GT 125/250 // Meditation doesn't mean you have to sit still.... Dec 19, 2019 at 11:36 PM #3617 Josh DMember Topics: 4Replies: 4Joined: Dec 16, 2019@joshhyogt125r2015 North walesHyosung GT125R 2015 cheers, thank you. Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In Share this ::Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pocket (Opens in new window)MoreClick to share on Skype (Opens in new window)Click to share on Telegram (Opens in new window)