Akrapovic Exhaust - Page 4 - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #31 of 39 (permalink) Old 10-22-2019, 08:48 AM
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Regarding re-mapping and performance increases and more power and more efficiency...

According to the Yamaha website my new to me FJR/Yoshimura cans provide:

22.85% Weight Reduction and Improved Performance!

Since I am already burning through rear tires much faster than I want I have had to find some way to cut back on all this newly discovered power. I have decided to stuff old rags inside the air intake to limit the air flow. This helps keep the front tire on the ground and keep the rubber on the rear tire. I could just rely on my right wrist and the traction control or even stay in Touring Mode but I prefer using the rags. That way I can tell folks that I always keep it in Sport Mode, that lets them know that I am Awesome. Since I will be in Alabama this weekend I can tell folks that the rags are my version of Nascar Restrictor Plate Racing.

It is Very Important to me that my 640+ pound FJR with roughly 125 HP at the rear wheel might get a 0.037264 % increase in HorsePower from these mufflers. That coupled with the HUGE 22.85% weight reduction will really make a difference on my next ride.
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post #32 of 39 (permalink) Old 10-22-2019, 12:49 PM
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So you're on the rag now? You know of course, the rags are there so you can pull them out and shine those Yoshi's, which then will reduce drag for fuel mileage and have the side effect of making you look so Darned Kool. I hope your trip to AL is a good one and you get to hang out with other Kool people.
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post #33 of 39 (permalink) Old 02-02-2020, 12:27 AM
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Quote:
Originally Posted by zwartie View Post
Went for a little 500+ km ride yesterday. A buddy of mine hosts a fall colours ride every year and I was able to make it on this year's ride. Just before heading out I decided I would remove the dB killers (see below). Took all of 10 minutes to remove including getting the dremel out to grind off the tiny bead of weld holding the set screw. Wow, what a difference! Very deep tone - I love it!







Zwartie
I've been wanting more rumble/noise out of my Akrapovic's and would like to remove the db killers and see if I like that before I go towards Two Brothers. Can u give me more info how to remove the db killers and can they be put back in if I don't like the sound? Any drone at cruising speed?

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post #34 of 39 (permalink) Old 02-17-2020, 04:41 PM Thread Starter
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fast318,

There's a small set-screw that you should be able to see inside the end of the dB Killer. It's secured by a small bead of weld that can be easily removed using a Dremel cutting wheel. Takes about 30 seconds or less to cut the weld. Then loosen the screw and the dB Killer just slides out the end. It's really that easy. Let me know if you have any other questions or need me to post pics. By the way, I love the sound! No annoying drone at highway speed - at least not for me :-)

Zwartie

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Originally Posted by fast318 View Post
I've been wanting more rumble/noise out of my Akrapovic's and would like to remove the db killers and see if I like that before I go towards Two Brothers. Can u give me more info how to remove the db killers and can they be put back in if I don't like the sound? Any drone at cruising speed?

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post #35 of 39 (permalink) Old 02-17-2020, 05:08 PM
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Thanks zwartie! I'm out of town so I can't look now. When I looked inside the can before, I saw a threaded inset but no screw. It doesn't look like there's anything I can remove. I wonder if the db killer was already removed? I'll post a pic when I get back to town.

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post #36 of 39 (permalink) Old 02-17-2020, 11:32 PM Thread Starter
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I just so happened to fire up the FJR this afternoon while "working" in the garage. Check out the video link below. Not sure if the audio does it justice. Let me know what you think.

https://youtu.be/hEm9BLBMbmc

Zwartie
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post #37 of 39 (permalink) Old 02-19-2020, 09:07 PM
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Here's what the ends of my cans look like. It look like the db killers were already removed. Yeah mine sounds similar to yours in the YouTube clip. I'm not happy with the sound so looks like over time I'll go to the TB exhaust.

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Last edited by fast318; 02-19-2020 at 09:11 PM.
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post #38 of 39 (permalink) Old 02-20-2020, 02:05 PM Thread Starter
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fast318,

What don't you like about the sound? Did you expect them to be louder? I was unimpressed with the sound when the dB killers were in place. I love the sound with the dB killers removed - nice and deep without being obnoxiously loud. But then I know that it's all subjective.

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Originally Posted by fast318 View Post
Here's what the ends of my cans look like. It look like the db killers were already removed. Yeah mine sounds similar to yours in the YouTube clip. I'm not happy with the sound so looks like over time I'll go to the TB exhaust.
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post #39 of 39 (permalink) Old 02-20-2020, 02:33 PM
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I'll just throw in that I've heard a couple of FJR's with the TB's... they are obnoxious and annoying, but that's just my opinion.

Ray
Keep yer stick on the ice....
2014 FJR1300A - Root Beer (sold)
2009 CBF1000A - Sienna Red
1999 VFR800Fi - Pearl Shining Yellow
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