Be thanklful it's not the IT490. The 465 was sweet where the 490 was a beast. The only thing you'll face is soft suspension. Very good for a play bike, but too soft for competition levels. The engine has one of those sweet power band: great torque and good top end power.
Parts Bandit still lists the parts fiche so would expect Yamaha still has the important parts available.
When the going gets weird, the weird turn pro