I also notice today when I take my hands off the handle bars it automatically leans right. On my r6 my bike would just follow its path and go stright.
first and foremost, make sure none of the little spacers at the wheels hubs are missing.
(refer to drawing).
Does it 1) try to steer at constant speed too when you are holding the bars? or 2)only when you let go?
if its always trying to steer, then something is out of line, either misaligned wheel, or something bent.
if its only as you slow down (when you let go you chop throttle) it could forks related.
Reset your forks setting (preload, compression and rebound), while doing so check the number of turns, if there's a huge difference then reset and test run. Also check the seals, one fork may be completely drained.
check chain alignment, preferably with this something like this tool:
and inspect sprockets for uneven wear on both sides, also check if chain is running centered on the sprocket. (dont use the marks on the swingarm)
problem persists? check chain alignment again...if it is out of alignment again, learn how to properly align the chain and tighten axle nut...many threads on that here..
alingment fine? but problem persists? check rear wheel alignment by comparing to front wheel using the string method:
if chain is aligned and wheel is crooked, could be bent swingarm