It appears there is no ready made variator tool for the 500 that I can find, but a ggogle search turned up some Ruckus guys making their own. Seems we could do as good as them! Anyone made one around here? I have a JCosta I want to learn to put in with some help from a mechanic friend.
Here is the Ruckus guys Ho-made tool:
http://battlescooter.proboards.com/index.cgi?board=howto&action=display&thread=2663