{"id":1491,"date":"2015-08-12T15:43:21","date_gmt":"2015-08-12T07:43:21","guid":{"rendered":"http:\/\/outrecording.com\/?p=1491"},"modified":"2026-01-12T22:45:36","modified_gmt":"2026-01-12T14:45:36","slug":"klx250s-stock-exhaust-vs-fmf-q4","status":"publish","type":"post","link":"https:\/\/www.outrecording.com\/tw\/klx250s-stock-exhaust-vs-fmf-q4\/","title":{"rendered":"KLX250S Stock Exhaust vs FMF Q4"},"content":{"rendered":"

Sorry, this entry is only available in English<\/a><\/p>It came time for me to pick up a new slip-on exhaust for my bike. I wanted the weight savings of an aftermarket exhaust as well as the power increase. What I didn’t want was a headache and pissed off looks from people as I drove by. I wanted something quiet. I wanted to have my cake and to eat it too. After some diligent searching, the best option within my price range was the  [content_tooltip id=”1516″]<\/strong><\/span> But there was a problem…<\/p>\n

Sound is Subjective<\/strong><\/h2>\n

One guy reports it being real quiet. Another guy says it’s way too loud for him. So I quickly searched youtube for answers. And man, there are a bunch of videos for the Q4! A lot for the KLX as well. Ain’t the Internet a grand thing?! Well…not exactly.<\/p>\n

The next problem is, you can’t really tell from the videos<\/strong>. Sound quality is all over the place. Well, not exactly. The sound quality sucks. And why shouldn’t it suck? They’re recorded with phones that use limited microphones. Bass is is majorly lacking. And some sound like there’s a low pass filter chopping off the higher frequencies.<\/p>\n

With little to go on, I bought the Q4 *hoping* it wouldn’t be too loud for my liking. In event is was, my “Plan B” was to buy the Powercore 4 Quiet Core Insert that has been reported<\/a><\/span> to fit with some small modifications and helps reduce the noise – AND…with no reported power loss. Nice!<\/p>\n

With all that in mind, I went on a little nerdy crusade to make a video on the sound difference between my stock KLX250s muffler and my new FMF Q4. I figured what the hell. I have the audio  equipment, I’ve been dabbling in video lately. Why not give it a shot? Now the next guy thinking to buy a Q4 can have something solid to make his decision on. Or so I hope.<\/p>\n

Location<\/h2>\n

I was looking for a quiet place to record. It wasn’t easy. I’ve come to realize that there are no quiet places in Taiwan during daylight hours…only less noisy<\/strong><\/em> places. I decided on an industrial park in Pingdong county that’s “less than used”. It has lots of open spaces and not so much vehicle traffic. There’s a parking lot for nobody that looked great for the test. (literally no buildings around and no practical reason to park there)<\/p>\n

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I packed up all my gear and made the drive out…<\/p>\n

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Set everything up…<\/p>\n

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…and began recording.<\/p>\n

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I later realized it would take about 24 hours for the high temp silicone to properly cure. So I brought the Q4 for nothing.<\/p>\n

The Video<\/h2>\n

I wanted the video to be more than just “walking around the bike and giving it a few revs”. I wanted to see just how many decibels each exhaust was spitting out. I wanted to hear how it sounded as it drove by. I wanted to know how it sounded while you were driving. And that’s exactly what I did.<\/p>\n

There are three parts to the comparison:<\/p>\n