Reply To: Strange noise from rear cylinder Jul 11, 2020 at 12:11 AM #4676 ♠️ M77👑 Admin Topics: 40Replies: 2,986Country: UKBike Model: GT Did you manage to get a video? If you hear metal scratching sounds going up and down rapidly near the valve head/cylinder barrel. Thats the piston rings Is that what youre hearing?
