Stunt Bike Forum - What size clip ons should i use and wat degree

That's all personal preference. There is no cookie cutter answer unfortunately.

It depends what you want.
Some people do it cheap and swap their clip ons left to right and flip them upside down. This is awesome while on the back wheel but can take a toll on yours wrists in normal riding. Also check for turning clearance if your running full fairing.
Some buy aftermarket clip ons(like I did, I got vortex 0 degree clip ons). They come in various degrees and can be cut/set to any length you want. This gives you a lot of freedom but you may have issues on getting. Full lock with a full fairing bike just like the inverted bars.
Also consider if your going to run your bars above or beneath your triple clamp. Running them above will change your steering geometry and affect handling(not nesacarily bad). You could always run a hohey triple clap or bars with risers to rectify any change that would happen.

Just think about where you want your hands to be. The angle of your wrists etc. you will be able pick what's best for you with some thought.

I hope this helps.
I know how crap it can be to not get any answers when your asking for help on this site but if everyone gave back as much as they took from this forum it will forever be a limitless source of knowledge.