Running 1999 polaris sport 400 without silencer - Polaris ATV Forum
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post #1 of 5 (permalink) Old 12-18-2010, 02:51 PM Thread Starter
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Running 1999 polaris sport 400 without silencer

I have a 1999 Polaris sport 400 and I'm wondering if I can run it without the silencer without hurting the motor
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post #2 of 5 (permalink) Old 12-18-2010, 07:22 PM
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Welcome to the board!

I tried setting my password to "penis" but it said my password wasn't long enough...
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post #3 of 5 (permalink) Old 12-19-2010, 06:37 PM
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If I remember correctly, The 99 400 is a two stroke. Do NOT remove the silencer. It will lose power and be very loud and could cause engine damage if it causes a lean condition. If you want more power or better sound, get a good pipe/silencer and dont forget the jetting when you do so.
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post #4 of 5 (permalink) Old 12-19-2010, 06:51 PM
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With a 2stroke it is very important to have an exhaust, it needs a certain amount of back pressure, also you will lose a TON of performance without an exhaust. much more important then a 4stroke exhaust.

So yes, keep the exhaust. is there a reason you want to get ride of it?
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post #5 of 5 (permalink) Old 12-20-2010, 06:11 PM Thread Starter
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There's not a real important reason I was just curios and I wanted it to sound a little better
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