Yeah, I used to track my CBR600RR, and it needed tyres, chains, clutches on regular basis.
Then I wanted to go racing and spend +40 days @ track per year. Extrapolated from my previous costs on CBR, yikes!!! On Ninja 250, one set of tyres will last entire season!!! And they're so much cheaper as I could get MotoAmerica JuniorCup takeoffs for nothing!!!