With the stock front springs, yes you need to be careful on lowering the front(Charlesbusa @ Oct. 31 2006,22:44) +1 on the +1 inch on the rear.
About lowering the front, careful, that'll reduce ground clearance. Scraping hard parts is no good.
so you don't scrape your fairings or front fender. If you re valve and re spring
the front to where it should be for your weight...then you won't have a problem