Outlaw backfires letting off the throttle

[Pokoki]

Hey everyone

I just picked up an 07 Outlaw 525 IRS. She is a beast, and surprisingly easy to ride.

My question is everytime I am on the throttle hard, and then back off, it backfires. The guy I got it from said he hadn't ridden it in a few months, so I drained as much gas as I could and filled her up with some fresh 91 oct and then changed the plug.

Any ideas????

[OutlawBill]

Outlaw from factory is lean up both pilot and main jets and check seal at header and exhaust pie joint for air leak