FMF 4.1 Spark Arrestor Install - Is it any quieter? 2020 Yamaha WR450F

[@officialsix3seven]

3dB is half the sound pressure, so while it's only '3', it's actually a substantial reduction because dB is a logarithmic scale.

[@sherburnoutdoors]

Thanks

[@ryanrides478]

Hey Sherburn I was wondering if you used any gasket maker where the muffler slides over the header pipe? I’m looking to get this pipe for my 2022 and read that some people had an exhaust leak at the connection. Thanks!

[@davidcornuat8446]

Really nice bike, just got a brand new 2023 and I am expecting the same slip on FMF. Did you play with the map since then ? Best David

[@sherburnoutdoors]

No, I did not change the map

[@chriscallow4667]

What part number was the a tester? 040639?

[@andyarmendariz647]

I need help i took off mine but i dont know if it could happen something wrong or bad

[@FastFlowFrosty]

No it’s all good it won’t hurt the bike at all!

[@F80mthree]

@@FastFlowFrostypretty sure it’s technically better for the bike with it out.

[@FreeRiderFMX]

Hey man thanks for the video sick bike! Where did you find those pipe guards though? 😮

[@sherburnoutdoors]

They are P3 carbon, I bought them at Rocky Mountain

[@FreeRiderFMX]

@@sherburnoutdoors thank you !

[@coburna5]

Put the powers in and spread them. Gets it out without harming the edge of the arrestor.

[@danielesquivel8666]

Where do I find that part. What’s the brand

[@sherburnoutdoors]

FMF, comes with the pipe

[@sean.g4516]

Do a video with that on a 2stroke

[@sherburnoutdoors]

Unfortunately I only own a 4 stroke

[@bladeslicemaster5390]

You didn't say what the sound level at idle was after the arrestor was installed

[@chillon2922X]

I got a fmf and i got a wr as well. The Fmf is way! to loud. Its louder than my mx bike. Even on track you can get into trouble with fmf. For trail riding its way! to loud. Locals will freak out..useless for me. Will sell it.

[@sherburnoutdoors]

The spark arrestor quiets it down a lot

[@brucemorrison3563]

Quiet bikes keep trails open.