Originally Posted by Pleiades

Welcome on board mate.

Nice bike - I like it too!

Have a read of this regarding curing the surging.

You almost certainly need to do something about the fuelling after fitting free-flowing air filters - you'll be making a bike that already suffers from a weak A/F ratio weaker still, which is one of the main contributors to surging on XTs.

Adding some preload spacers to the forks will help sharpen things up at the front relatively cheaply.