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Is the spark arrestor removable? Does this affect performance?
Over 7 years ago
Yes, the spark arrestor is removable. Any restriction to airflow will reduce power, but a spark arrestor will cause very minimal power loss.
Top 500 Contributor
Over 5 years ago
Yes, the spark arrestor is easily removable in the new DR.D exhausts. And yes, it does affect performance somewhat. I noticed that the bike revved a bit more freely with it removed and that I may have gained a little off the bottom on my YZ 450F.