Reply To: Valve clearances – GT125R Oct 29, 2024 at 8:19 PM #15394 Simon👤 Member Topics: 1Replies: 353 The intakes should be between 0.1mm-0.2mm exhaust 0.2mm-0.3mm when cold. To tigh clearance will open the valves to soon & also as it warms up likely to keep the valve slightly open.