Nut size?

[NotAnotherHill]

Got a new nut (the 9 mm deep one) and new lock washer and fitted them yesterday. Out today for a 100 miles before the GP. Amazing the difference: reduced vibration and no issues with low revs running. I was thinking the carbs were out but obviously not. Had to invest in a 32mm socket and half inch breaker bar. Still going to order the deeper 12mm nut and replace it for peace of mind.