Hiya and best of luck!!! I strongly suggest that you do NOT lower the bike and I explain why. When I bought my first XT660X back in 2008 I was convinced that it was too high so I had the lowering kit fitted. Result?? (a) Fully loaded and two up it scraped the pegs on the ground even on modest corners and (b) The handling was awful and (c) I could not change it back to standard without purchasing a new side stand plus quite a lot of work. My latest XT660X instead is standard height and 100 times better. And I am only about 5 foot 8 ish. Ciao!!!

__________________
(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km.
Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted.
Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres.

SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips....