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Old March 23rd, 2021, 08:52 PM   #1
clakmurrick
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Name: Clark
Location: Dallas, Texas
Join Date: Nov 2020

Motorcycle(s): 2008 Ninja 250R

Posts: 22
What's inside the stock air box?

Hey everyone, in my quest to get my bike running like it should, I'm on eBay looking for stock airboxes. I've found a few that look complete, but I can't tell what is necessary. I've seen some with and without the snorkel. Based on my research, it seems like it's only a noise reducer, so not too important. Regarding the filters inside, I can't tell if that metal mesh filter is necessary. I'm not sure what it's called, but I vaguely remember what it looked like when I had the airbox (the one I threw away like a dumbass lmao). What is the purpose of the mesh metal filter? Is that what is even is?

I think I figured it out after typing all this out, seems like a flame arrester?

Thanks!

P.S. Bonus question: The kleen air system is still installed. I see that a small hose connects the top of the engine to the bottom inlet on the kleen air valve. The rear facing port connects to the airbox. There's also a small vacuum line connected to the front side. There is one more port, and it's on top of the valve. Is it unused? I could not find any photos of anyone using that port.

Here's a photo, with the port circled in red. I assume it remains uncapped and unused?



Thanks kkim for the photo from your post!
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Old March 27th, 2021, 04:31 PM   #2
Runeknight95
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Name: Derek
Location: Boynton Beach
Join Date: Mar 2013

Motorcycle(s): 08 cbr1000rr, 2008 + 2012 ninja 250, 06 zx6r (636!) track only

Posts: 150
Quote:
Originally Posted by clakmurrick View Post
Hey everyone, in my quest to get my bike running like it should, I'm on eBay looking for stock airboxes. I've found a few that look complete, but I can't tell what is necessary. I've seen some with and without the snorkel. Based on my research, it seems like it's only a noise reducer, so not too important. Regarding the filters inside, I can't tell if that metal mesh filter is necessary. I'm not sure what it's called, but I vaguely remember what it looked like when I had the airbox (the one I threw away like a dumbass lmao). What is the purpose of the mesh metal filter? Is that what is even is?

I think I figured it out after typing all this out, seems like a flame arrester?

Thanks!

P.S. Bonus question: The kleen air system is still installed. I see that a small hose connects the top of the engine to the bottom inlet on the kleen air valve. The rear facing port connects to the airbox. There's also a small vacuum line connected to the front side. There is one more port, and it's on top of the valve. Is it unused? I could not find any photos of anyone using that port.

Here's a photo, with the port circled in red. I assume it remains uncapped and unused?



Thanks kkim for the photo from your post!


I just took the carbs out today, again a once a year thing it seems lol, anyway smash the stock airbox and get the air filter pods, make life easier for all future repairs
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