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Let me add I've already ordered another one. I went to STG and got a steel 43 520 Driven sprocket for the N400. I have a Z. Guessing its the same?
 

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Absolutely will fit. Well look at it this way, you'll have time to get your rear wheel area, shock, swingarm, etc. real clean.

馃悏
 

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Thanks for the peace of mind! Yeah... when I went through amazon I was kinda iffy about it. I paid like 30 bucks to have this new one sent next day lol. Done watching TV and watching the mailbox
 

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You can put your bike in your Amazon Garage and it will guide you to the correct parts. They have a few parts for the Z like I also have, but I use a Ninja as a garage bike because they list a lot more parts. Same bike. Cosmetics. Oh, there is also a Ninja in my garage now!
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2021 Kawasaki Z400
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I was interested in going 13 tooth front with 43 tooth rear, which notor-motorsports website shows works with a 106 link chain? Is this incorrect?

Also I did not realise changing your sprockets can cause a gear position sensor issue? I absolutely do not want to deal with that. I would rather my bike left stock where possible and remain with factory safety. Is there a specific combination of sprocket sizes that do not cause gear position sensor issues? Or is it kind of like a lucky dip and some bikes are fine and others are not?

I am a 75% comute rider and when I am being a bit more cheeky its still on very twisty lower speed roads, i almost never do highway trips or speeds over 120ishKPH (75mph), So i am very keen to gain some more acceleration at the expense of the top speed i dont use, but i do NOT want to cause any ecu errors or have to lose/jerry rig safety features.
 

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Update. Life sucks lol. I made a bad move. A few site were sold out of the vortex sprocket I wanted so I went to Amazon and ordered a 43 tooth Vortex with six bolt pattern... only to find out after cutting off the chain thinking all was good it wasn't. It doesn't fit smh. I guess me being new this is what I get. How do you guys know for sure its going to fit?
Which part is wrong, the sprocket or the chain?
 

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The first sprocket i ordered was wrong. The bolt pattern to the wheel is off a hair. My chain is good Rk chain 108 links Xring rivit style. Tracy said I should be good with this 2nd sprocket coming.Its a Driven 43 tooth from STG that's tech listed for a N400 even though I have a Z400.
 

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I was interested in going 13 tooth front with 43 tooth rear, which notor-motorsports website shows works with a 106 link chain? Is this incorrect?

Also I did not realise changing your sprockets can cause a gear position sensor issue? I absolutely do not want to deal with that. I would rather my bike left stock where possible and remain with factory safety. Is there a specific combination of sprocket sizes that do not cause gear position sensor issues? Or is it kind of like a lucky dip and some bikes are fine and others are not?

I am a 75% comute rider and when I am being a bit more cheeky its still on very twisty lower speed roads, i almost never do highway trips or speeds over 120ishKPH (75mph), So i am very keen to gain some more acceleration at the expense of the top speed i dont use, but i do NOT want to cause any ecu errors or have to lose/jerry rig safety features.
I was interested in going 13 tooth front with 43 tooth rear, which notor-motorsports website shows works with a 106 link chain? Is this incorrect?

Also I did not realise changing your sprockets can cause a gear position sensor issue? I absolutely do not want to deal with that. I would rather my bike left stock where possible and remain with factory safety. Is there a specific combination of sprocket sizes that do not cause gear position sensor issues? Or is it kind of like a lucky dip and some bikes are fine and others are not?

I am a 75% comute rider and when I am being a bit more cheeky its still on very twisty lower speed roads, i almost never do highway trips or speeds over 120ishKPH (75mph), So i am very keen to gain some more acceleration at the expense of the top speed i dont use, but i do NOT want to cause any ecu errors or have to lose/jerry rig safety features.
[/QUOTE
 

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ADM89 so I believe either plus 1 or minus 1 in front will will throw a code. As far as rear you can change 1 tooth and keep the 106 or change 2 teeth and still not throw a code BUT will need to up the chain to 108 links. I hear it makes a big difference so thats what I'm doing currently 馃弽
 

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Less than 7% change in your gearing you are good. More than 7%- joss of gear position indicator and check engine light
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Kawi wowi green. Haha l love it! Reminds of something from the 70's except it was Maui wowi green
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Edit. Yeah, I'm that old, and the modding has begun.
 

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Guys I need advice. The bikes is fully assembled and ready to go, except one thing. I decided go a bit too far riveting... I made hairline split in one of the rivets. Thoughts? Is it safe? I would think its still better than a C clip... should I ride for a week until I order a new one and redo it?
 
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