Spark arrestor in or out????

Hi... how many people run there bikes with the spark arrestor out?? i have a 09 te 510 and find it runs alot better with it out but noisy.. could i cut it in half cause it looks very restrictive.. any pros or cons with it in or out?.... cheers.

also does the ecu need time to sort itself out after removing or installing???

In, more low-end with the increased back pressure, quieter, and much safer in dry country. ECU doesn't compensate for change in exhaust, wish it did.

Out, they can take your bike away. Is there even really a debate?

Hey Guys!
I took mine out a couple of weeks ago. My bike has all the emissions stuff on it still and it ran horrible. It popped, hesitated and surged.....Worse than it already does with all this stuff on With the race kit on it should help the bike on top. It was louder but the same as a track bike sounds. Maybe still a bit quiter. If you arn't hot rodding around you shouldn't cause attention to your self. Just dont go into the mountains with out it!!