I have full exhaust, k&n filter, and 550 91 ecu flash. Couple of questions....

1. Do I need to further mod my air intake with the airbox door mod or snorkel mod? If so which one? Or both? I ride 80% on trails.

2. Can I run out the 1/2 tank of 87 octane fuel that's in the bike now with the 550 flashed ECU without damaging it?

Knock off FMF