'98 Kawasaki ZX-9R shooting a big flame from the exhaust

Fire! I guess the air/fuel ratio was a bit too rich :P It made an awesome sound when rolling off the throttle with high rpm, but it ruined the fuel efficiency of the bike dramatically.
The exhaust is a Laser Deeptone, no further modifications to the bike.

[@RaymondGaming]

Merci beaucoup! :D