Hey Maverick like the new banner,
the XJ, get a local garage or bike nut to balance your carbs, for all the use you will get out of guages and adaptors, these will hang in the hut/garage getting rusty, you will notice a big difference after a balance, i.e. response, vibrations, fuel economy, my bike (the old girl) still pushes vibes through my bars 2500-3500rpm, this moves to my right peg at 5500rpm-its the nature of the beast
after you've spent £30 getting the local oily jumper guy to balance your carbs-save a further £30 and get your valve shims checked in the spring