Reply To: Cylinder head bolt torque – GT125R Forums 🚥 PiT STOP 🔧 Hyosung Technical Help Cylinder head bolt torque – GT125R Reply To: Cylinder head bolt torque – GT125R Dec 10, 2022 at 7:57 PM #9222 SimonMember Topics: 1Replies: 278@syco KentGt250 f1 Base nuts 15-20 nm, head bolts 21-25 nm.