hi, as it's one theme that re-occurs from time to time i tidied up some of my mods, so for the reg-- http://www.xt660.com/showthread.php?t=17054 hope this helps.

you are probably never going to face the problem, tho it would give you better odds if its changed, if i was doing your trip- change to be sure!

i would reccomend taking a front sprocket.

all the best bernard