Took dog to vets in Morton yesterday. This time I was a little more thorough in checks. After normal start up I noticed the o/s side pipe was still a little louder at cold fast idle whereas n/s one gave smooth three cylinder hum. 23 mile journey to Bury was normal with warm idle perfect at 650rpm. Checked again when I arrived and both pipes equally quiet at idle. Same when I got home.

For the moment assuming issue has fixed itself and maybe an idle/fuel trim relearn issue on bank 1 as suggested in an article linked to me by JohnV6 although this is normally needed after a battery disconnect thinking 🤞

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone