Yes, it appears you're going to be using U.S. spec BS34s. I can see the mix screws are still capped over with the brass plugs in your 1st pic. You'll need/want to remove those plugs so mix screw access and adjustment is possible. The mix screw also has a small o-ring on it to seal it in the hole and that most likely will need replacing.
The U.S. spec BS34s came very lean from the factory. Many report improved running with one up on the mains even on a totally stock bike. I'm quite sure you'll want to re-jet. The displacement bump isn't that big a deal but the free flowing exhaust will be.
As mentioned, the needle is fixed and can't be adjusted. It can be shimmed but only richer because it is spring-loaded from the top. Adding a shim washer above the fixed e-clip will not change the needle height, only preload the little spring more. But, many are able to successfully tune the BS34s without having to adjust the needle. By increasing the mains and pilots, they bleed over into the factory lean midrange and make it right.
If that doesn't work out, there are a couple adjustable needle replacement options. MikesXS has what they call the "Canadian" needle. They also sell the matched "Canadian" needle jet and say these two parts should be used together. The other option, and one I think may be the better one, is a rebuild kit from eBay seller Cruzinimage. It contains not one but two adjustable needles. The taper profiles are quite different so there should be a noticeable difference in how the two needles work.