Ditto - with RM_Guy. I ride primarily woods, and stand up a lot, so I simply moved my shifter upwards a tad. Take some time the next time you go riding, and experiment a little, at the same time adjusting the pitch/angle of your handlebars.
There are like fifty billion chest protector options out there now, and they all pretty much fit nicely, and work. Since I'm a personal trainer, I have to search for brands that fit larger/built guys. I had to buy the SIDI boots with the calf adjustments...and I chose ACERBIS for my chest protector since it covered more easily my massive chest! :nod:
Anyway, take your time - and welcome to dirtbikes!