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2001 Polaris Scrambler 500 - ReJetting


rockwell16

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Hey I have a 2001 polaris scrambler 500 (2x4) and I just purchased an fmf power core 4 muffler do you have to rejet when installing just the muffler and will there be any noticeable power increase with this muffler I watched a video guy said he didn't have to rejet but i don't know I've gotten mixed answers hoping i don't have to but please let me know.

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you dont have to, but you may need to tweak the air/fuel screw to tame the popping.

most manufacturers of the exhaust will recommend a jetting kit for each application ...

if you go on the fmf site and look up your machine and exhaust, there will be the recommended jetting kit ,,,

you are probably popping now because of less fuel ...

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were can i get a rejjing kit a good one but not outrageously priced for my scrambler and is it hard to do on a scrambler and on fmf's web site the jetting is for a 400 2 stroke and they did it for 70 degrees I'm in arizona it ranged from 50 to 110 degrees so what would i jet it to I'm the weather is always slightly changing?

Edited by rockwell16
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