Oil leak from bolt at front of sump

So I've not used the bike in 2-3 weeks and finally started her up this afternoon and everything seemed fine til I noticed a lot of smoke coming up from the front. Quick look underneath and oil is dripping from a bolt directly onto the headers, let her cool down and had a look then started it up again and as soon as the oil gets up to temp it drips again, obviously it's just thin enough once it's up to temp.

I tightened the bolt up a touch but worried about stripping it so didn't want to go too far, it's a little better but still drips once warm. Had a look in the workshop manual but can't find that particular bolt or torque settings, it's on the front of the sump and looks to just hold a black plastic tube on?

Pics are below (hopefully the link works), has anyone has anything similar or know what the torque settig might be for this bolt?

imgur.com/gallery/uSssWjN

Any help would be much appreciated.