Downpipes.. Old ones off - cant get new Motad ones on

[Andy Smith FZS]

I did have her running, just slipped the link pipe on and my new exhaust without sealing them and it sound amazing but i couldn't feel any leaks.  I read that new pipes can sounded abit tinny so I might be that and the smell of burning wd40.
Is there an easy way to check for leaks without roasting the crap out of your hand!