Hi there you can buy it at this link: http://www.xt660.com/site/node/136

scroll to the bottom of the page and click on the PayPal icon, once you are in the paypal website, there is a box when you can live a note and in that box please give Kev the exact model and year of manufacture and he will ship the correct mod to you.

All Kev Mods come are now very plug and play, with no soldering required, you get a step by step guide on how to fit them and how to tune the fuelling knob.