As long as your cans aren’t marked ‘Not for road use’ or Race use only’ or such like it’s down to the testers’ discretion. So as long as he (or she) are a reasonable sort who likes a motorcycle to sound like a motorcycle and not a washing machine there shouldn’t be too much of an issue.
The straight through Ferracci cans on my 900 have never caused a problem- maybe the rattle from the open clutch helps!!
