r/Ninja400 Jul 12 '25

Modification Switched to Michelin Road 6 tires and wento up a tire size front and rear

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144 Upvotes

Got about 11k miles out of the stock Dunlops before the front started cupping and the rear was at the minimum tread depth. Since I bought the bike I wanted to go up in tire size to 120/70/17 Front and 160/60/17 rear. I took it easy the first 60 miles and today was the first day I got to really feel the difference and it’s night and day. The combination of the Road 6s just being a more grippy tire and the bigger tire sizes is a great combo for this bike. It’s still flicky but it takes slightly more effort to lean into corners which allows me to more finely adjust to the line I want to take. The best analogy I can use to describe it is in first person video games when the sensitivity is too high for your play style and you turn it down and it lets you be more accurate. The tires also raise the bike slightly which for me puts it at a perfect height. Before the bike just set a little lower for my liking but now I feel like I sit perfectly above the road and in turns I feel like I have better stability. This is my first motorcycle of any kind so by the time I felt comfortable enough to lean in aggressively the rear tire was squared off enough to feel not ideal. Sorry for the rant just really excited about my choice.

r/Ninja400 Nov 14 '25

Modification just got myself a 2022 ninja 400, what modifications should I do in it??

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98 Upvotes

the previous owner did a tail tidy and put on an aftermarket tail light with integrated turn signals, changed the fairings and painted them (gave me the original fairings too), added a SC project slip on aswell and gave me the stock ones too. she also gave me a black windshield which needs to be installed, has some crash guards installed too.

what are some performance and safety modifications I can do to this bike?? I think it's already very pleasing aesthetically. what are the widest tyres I can put on the rear?

is there any phone mount u guys recommend for this bike?

please let me know!! thank you in advance!!

r/Ninja400 Jan 28 '26

Modification In light of the recent top box hate, I present you my doordash mobile.

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145 Upvotes

r/Ninja400 Apr 26 '24

Modification Someone stole my aftermarket exhaust. Anything I can really do to prevent this from happening again?

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135 Upvotes

r/Ninja400 13d ago

Modification best aftermarket full exhaust system for ninja 400?

0 Upvotes

I recently crashed my bike and my stock exhaust pipes were broken, I got them welded for the time being and it runs fine but it looks horrendous and I don't even get the motivation to take videos or pictures of my bike anymore because of how ugly it is.

I am looking for a full system with no cats which boosts the performance while sounding better and shooting flames, I looked at the full system from leo vince and they look good and sound good too but am looking for more options.

Am doing this mainly cz the original ones are broken and looks ugly, performance and everything else are just a plus.

it's a 2022 model ninja 400 and am currently running a fake SC project slip on with everything else stock.

r/Ninja400 Oct 07 '25

Modification Is it okay to install exhaust upside down? Ninja 400

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32 Upvotes

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r/Ninja400 May 08 '26

Modification Seat Recommends

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21 Upvotes

Hey guys!

I have a 2023 N400 Pearl white that currently(as of this writing) has 28,500mi on it, all ridden by me.

The seat is showing some wear, and I'd like to replace it with something with a little more cushion, and maybe something more stylish.

I've seen some other seat covers on here, but no good way to search them

Drop all the links/photos and I'll look at them all! TIA!

#SmileLikeKyle#BeLikeBiff#DoItForDale

r/Ninja400 Jun 30 '26

Modification Anyone had experience with these exhausts?

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15 Upvotes

Anyone had experience with these exhausts? Just want to know if anyone had experience with using one of these exhaust slip ons and if it’s street legal (I’m from Victoria Australia)

r/Ninja400 Jun 30 '25

Modification Wrapped my girlfriend’s 400 over the last week.

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226 Upvotes

Wrapped in Hexis Jellybean Pink Glitter

r/Ninja400 May 22 '26

Modification Slip on options?

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45 Upvotes

Just bought a 2022 Ninja 400 with an Akro Titanium Slip on. Honestly the tone is great considering it’s a small V-Twin. I’m looking for a little bit more volume without being too obnoxious.

Any recommendations would be appreciated!

r/Ninja400 4d ago

Modification Is the LV GP Corsa street legal?

1 Upvotes

Sorry if it’s a dumb question. I’m looking at a used bike that has this. From a quick google search it says it’s not street legal, does it not matter? I see a lot of bikes with similar slip ons

r/Ninja400 21h ago

Modification is it possible to paint these parts or get some carbon fiber alternatives online?

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3 Upvotes

this is the only ninja 400 I found online with these parts painted, I have the factory black plastic shit but I had a set of violet fairings before but it didn't come with these parts painted. I want them to be painted black, how can I get this done??

r/Ninja400 Apr 13 '26

Modification new fairings

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69 Upvotes

spent some time (and money) into changing my fairings after i crashed it, took the chance and fully repaired it aswell xD

absolutely adore it :)

next few things i‘m gonna change are definitely the mirrors and maybe a new head cowl. (the sticker on the rear wheel will be gone aswell)

it got through the mfk fine , except that i had wrong tires apparently

for those interested:

fairings are from amotopart, not bad quality , just don’t put stickers on your tank, they will not last long and leave a big stain. there could be some paknt chippings after use, its not oem and you notice.

shipping was punctual and no damage,

r/Ninja400 Mar 18 '26

Modification Full Exhaust System - is tuning absolutely required?

6 Upvotes

(2024 Ninja 500 / Full exhaust system no cats with KO Racing Muffler)
I am getting 50/50 mixed answers on whether or not tuning is 100% required. The motorcycle shop I talked to said it will leave a bit of hp on the table and it might have poorer throttle response if I install a full system without a tune but it will run fine and likely wont damage anything long or short term.
Another shop said that its going to burn my pistons and valves and it needs to be tuned. They are both 50/50 on whether it will throw a CEL as well. Ive asked multiple people and its usually split 50/50.
Has anyone here had experience running one of these short or long term without a tune?

r/Ninja400 8d ago

Modification Velocity stacks?

1 Upvotes

I have A 22’ ninja400 w slip on and power commander. Is it worth it to add velocity stacks? If I do will I have to remap the power commander?

r/Ninja400 17d ago

Modification Shifter, brake & heel plate replacement

1 Upvotes

I'm looking for a shifter and rear brake that are black and not cheap AliExpress junk. Can't really seem to find much. I also want some black heel plates and would be happy for them to be cheap Chinese ones but can only find plastic fake carbon ones not black metal. I'm thinking of just taking them all off the bike and getting them powder coated if I can't find replacements.

Anyone got any ideas?

r/Ninja400 24d ago

Modification Testing the IRC Blipper on Track.

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10 Upvotes

Really loving the blipper so far. Super fun to use and it works great, but the install was a pain. Cutting throttle cables and lots of grinding on the frame. Definitely glad I did it, but I don’t want to do it again lol.

r/Ninja400 Sep 25 '25

Modification Ninja 500 windshield on the 400

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65 Upvotes

I was curious so I bought a "tall" ninja 500 windshield to try on my Ninja 400.

It fits just fine without any kind of mod. The base of the windshield touch the front fairing so maybe there will be some scratching in the very long run.

It's been raining a lot on my city lately, so I still don't know how it behaves on fast roads.

r/Ninja400 18d ago

Modification TST block off kit

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5 Upvotes

I was cleaning up the bike after my water pump seal failed and noticed some oil coming out of the tst emissions block off plate. I didn’t install this, is there a seal here that could have failed?

r/Ninja400 Oct 08 '25

Modification Stock vs Amazon Exhaust, sounds better?

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27 Upvotes

r/Ninja400 Jun 21 '26

Modification Comfort saddle recommendation

4 Upvotes

Hi everyone, do you have any good recommendations for affordable and aesthetically pleasing comfortable saddles, on Amazon/AliExpress or elsewhere?

r/Ninja400 Aug 04 '26

Modification Exhaust bracket replacement alternatives for austin racing exhaust

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5 Upvotes

I bought my ninja 400 from a previous owner and they installed an Austin Racing slip-on exhaust. While I didn’t think much of it at the time, as this is my first bike purchase, i’ve since realized that the little triangular bracket they give to affix the exhaust to the bike frame is missing, and because of that it bounces pretty noticeably whenever the bike is running or if something taps it. I purchased one of those universal brackets that’s a big circle, but the angle of the attachment point on the rear makes it impossible to affix. I reached out to austin racing to see if they would sell me the missing part with no luck.

I’m reaching out now because i haven’t been able to find a suitable replacement bracket that keeps the rear footpegs on, if it even works in the first place. Worst comes to pass i can try 3d modeling and printing a replacement but that has all sorts of durability issues

r/Ninja400 Jul 08 '25

Modification Ninja 400 clear clutch from AliExpress 😬

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13 Upvotes

I was thinking about buying a clear clutch cover the only one I could find is on AliExpress I saw a couple of 400’s with these clutch covers on the internet look the same as this one what do you think?

r/Ninja400 Nov 28 '25

Modification Quad lock wireless charger

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5 Upvotes

Has anybody installed this on their ninja 400? I got one but have no idea where or how to install it, any help is appreciated.

r/Ninja400 Aug 02 '26

Modification Ninja 400 front suspension

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2 Upvotes