The bridgestone BT014’s fitted new to my K12S (kindly, by the seller) nearly killed me they were so bad; unpredictable, not even good in the dry on that bike.
There has always been a 'rumour' about standard OEM tyres on bikes being a different 'recipe' to the after-market tyres of the same make. So many complaints about original tyres which doesn't make any sense to me whatsoever...