muffler questions

I'm going to MX an Hare scramble my 2008 rmz 250 until i buy another bike. well my ? is will a spark arrestor affect my MXing any bit?

You could always take it out for MX....or leave it in...you won't lose a race from your sparky...

You might not loose a race due to the sparky but you will feel a noticable power differance with it in compared to it being out

Im sure taking it out will make some improvement. It will be able to breathe better.

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