This just arrived from the 'States in the post.
Its a NOS Factory jet kit from the mid '90s. The Ebay advertisement said it was for a CBR1000F but the documentation in the kit says its for a CBR1000R.
I was a bit confused by this, but I decided to take a chance and buy it any way. Y'see, to the best of my knowledge, in the mid '90s there wasn't a CBR1000R model. There was a CBR900RR Fireblade that went on to become a CBR1000RR some time around the millennium. And there was the CBR1000F.
So, I'm hoping its for a CBR1000F but I'm not sure. At some point I'm going to have to replace the slowly rotting silencers (I've welded them twice already) and the most likely route will be by replacing them with one or two Yoshimura cans. If that happens, I'll probably need to rejet the carbs and I guess this is a good place to start.
In the meantime, I just want to smooth out the carburation and smooth out the transition from low revs to mid revs.
Watch this space.