Forums 🚥 PIT STOP 🔧 Hyosung Technical Help [Tutorial] How to swap Carb Main Jets – Hyosung GV & GT 125/250 Reply To: [Tutorial] How to swap Carb Main Jets – Hyosung GV & GT 125/250
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im guessing doing upjet is if you having a new exhaust upgrade or air filter performance
Stock machine = Upjet it anyway (the rear is a little cooler as fuel has a cooling effect) & should run a little better in 5th.
Modded machine -> K&N Air Filter or Stainless Exhaust pipe or End CAN = upjetting mandatory ofcourse. Modded bike ? = Baffle runs better with baffle in than without baffle on any 4T (& quieter anyway! 😉 )
Laser or IX plugs help a lot. If the plugs are “coffee brown” the bike is happy!
The stock ones are too sooty & a nightmare for UK winters, usually chuck em first thing lol.
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