G'Day marioG, in the general discussion section there is a thread called links to service manuals, zombie has put a link to a manual for agility125 and further down he has the manual there on the page, you can scroll down through these pages. Section 9 has the instuction on how to remove the variator and it looks quite easy, you will need a universal holder for it, they are not expensive to buy or you can make one yourself. All the best with your scoot.
