Stock Muffler - Removal - Kawasaki Ninja H2 Forum
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post #1 of 38 Old 02-17-2017, 04:53 AM Thread Starter
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Stock Muffler - Removal

I am collecting my new 2016 H2 later today.

Is it AFR safe to remove the ugly stock muffler, or should i wait until i get the full exhaust and ECU re-flash?
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post #2 of 38 Old 02-17-2017, 05:23 AM
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No need for a flash just to remove that ugly dustbin hope you enjoy you new bike
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post #3 of 38 Old 02-17-2017, 05:49 AM Thread Starter
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No need for a flash just to remove that ugly dustbin hope you enjoy you new bike
Thx
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post #4 of 38 Old 02-17-2017, 06:25 AM
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Originally Posted by kawah2 View Post
I am collecting my new 2016 H2 later today.

Is it AFR safe to remove the ugly stock muffler, or should i wait until i get the full exhaust and ECU re-flash?
You didn't say what you were going to fit in place of the stock muffler. You weren't suggesting running the bike with an open pipe?

There aren't any changes required when removing the stock muffler to replace it with another, like the Akrapovic which we get in the UK.
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post #5 of 38 Old 02-17-2017, 07:46 AM Thread Starter
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Just the headers and cat .... if its too loud i have a Ti Akro muffler from another bike lying around, and a 24" Ti straight pipe from a project bike.

I removed the muffler from my 2012 BMW s1000rr when it was new, and the noise was fine.

In Florida its no big deal, as i ride in the middle of nowhere with ear plugs.
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post #6 of 38 Old 02-17-2017, 08:46 AM
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It'll run just fine without the big can, I ran it for most of the season last year like that while I tried to work out my exhaust situation.

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post #7 of 38 Old 02-17-2017, 11:11 AM
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That's a cool pic Knolly. When I showed up at tech inspection they were like uh uh, not because of noise levels but because of no muffler.

While waiting for Brock to finish the full exhaust I ran for a short while w/ the same thing, just the muffler removed. It's loud but honestly that's all it is, loud,,, sounds like junk compared to a full system without the Cat.


Last edited by STRADALE; 02-17-2017 at 11:16 AM.
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post #8 of 38 Old 02-17-2017, 01:39 PM
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You really should not be running your bikes this way without the muffler.
The engine needs the back-pressure that the muffler provides.
Without this back-pressure you will damage your engine.

2016 Ninja H2 ľAkropovic Exhaust .. Stage III gears .. Velocity Stacks .. H2R Fuel Pump .. DynoJet PCV .. DNA race filter .. FlashTune .. DynoTuned .. BST wheels .. Yosh fender eliminator.. SBS brake pads .. Lightech gas cap
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post #9 of 38 Old 02-17-2017, 02:49 PM
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I didn't know you would even try running a bike like this without the end can of some sort. Yes I believe it wouldn't run ideal as it would be designed to run with some sort back pressure, but I wouldn't think it would damage the engine. After all some exhaust systems are straight through with virtually no back pressure, but these are tuned to the engine normally. The US is really cowboy country huh You would get shot here riding on the street like that.
Good luck with the new bike!
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post #10 of 38 Old 02-17-2017, 03:27 PM
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it's a bit lean. if i remember correct it was something around 13-13,5 during acceleration and 14-14,5 when cruising. But i also had installed a dna filter when this was measured.

i think that cat is producing more backpressure than any open system so it would be fine without the muffler.
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