Y pipe is supposed to make a bit of defference on the 1000's ...
Definatly put a can,perhaps new cat seat, bar bag, riser ...list goes on and on i would start with these few items 1st tho.
y- pipe
timing key 1.5
billet air horn (larger diameter)
air box screens slp
side vents ...
slp pipe kit
mbrp silencer ( way liter than the slp one that comes with the kit)
programmer - bood docker
boysen rad valve - way tougher than the v force on the big twins.
adjustable handle bar upgrade
frog skins for hood vents
simmons skis
billet wheels,
scratchers
well you asked,,,, thats what i had on my 07 m1 ,,,loved it ,,,