ninjette.org

Go Back   ninjette.org > General > General Motorcycling Discussion

Reply
 
Thread Tools
Old November 20th, 2022, 01:31 PM   #1
Norway
ninjette.org member
 
Name: S n 0 r r
Location: Stjoerdal, Norway (San Diego, CA, USA, 2015-2016 , Bielefeld, Nordrhein Westfalen,Germany 2021-'22)
Join Date: Sep 2012

Motorcycle(s): TMZ 5.952 "Tula" 200, Ninja 250 -Special ed. '11, ZZR 1400 (ZX14), Honda CB 1100 F Super Bol D'or

Posts: 123
Should one avoid cheap air filters from for example aliexpress and similar sites?

Since I live at about 6328′30″N 1110′15″E I don't ride the Ninja 250 all year round. When I have taken it out for a new season I noticed that it often struggled to get the rev counter beyond 10 000 RPMs, accelerated slower and appeared weak.
Some tanks of fresh 98 octane gasoline and/or a new air filter have regained some horsepower, from time to time.
Air filters quickly get clogged around here (Trondheim surroundings, Norway) due to lots of rain that mixes with dust due to road works et cetera.
Then my question is: Is it highly recommended to buy the more expensive air filters, or could one so about as well with some from chinese online shops offering air filters for a small fraction of the price of the original parts or other more costly variants? Anyone that knows, or has solid background for own opinions?
Norway is offline   Reply With Quote




Old November 20th, 2022, 10:17 PM   #2
floggolf
ninjette.org newbie
 
Name: Jason
Location: Pacific NorthWET
Join Date: Oct 2022

Motorcycle(s): EX250F

Posts: 5
China foam

Do you wash and re-oil your filters?

I think the manual sez you can do this 5 times.

If the china foam doesnt get gooey or turn to crumbs, I don't think there would be a problem, as long as the pores in the foam are the same size.

The FAQ at Ninja250.org sez the foam filters perform as well as the oiled cotton and other types.

I just bought a china foam filter, but won't put any run time on it until spring and I live near a rain forest. The air is pretty clean.
floggolf is offline   Reply With Quote


Old November 21st, 2022, 09:14 AM   #3
thedrewski86
ninjette.org guru
 
thedrewski86's Avatar
 
Name: Drew
Location: SoCal
Join Date: Jul 2013

Motorcycle(s): 2007 SV650S 2005 EX250F

Posts: 438
I run a foam Kawasaki filter that I got on ebay for $10. I also have a cheap foam no-name filter that was about the same price - I had to trim it to fit but it worked fine too. It's a spare because I would rather run something that came out of a "Kawasaki" box, all other things being equal
I have always been a fan of running factory-spec air filters. If it's still in good shape and needs oil, error on the side of oiling it lightly. Too much happens fast.
__________________________________________________
Don't think, look!
thedrewski86 is offline   Reply With Quote


1 out of 1 members found this post helpful.
Old November 22nd, 2022, 04:26 AM   #4
Shafer
ninjette.org member
 
Name: Jay
Location: Nh
Join Date: Aug 2022

Motorcycle(s): 07 Ninja ex250 blue and 07 Ninja black

Posts: 59
I would suggest getting a Uni Filter NU-2366 for the pregen and oiling it with Belray foam filter oil. (A little goes a long way, don't put it in soaking wet)

The air filter is your only defense from sucking stuff into your carbs and engine. Plus the filter takes a bit of effort to get to, just get a filter you don't need to worry about.

You can get the filter off Amazon for $20. Amazon's filter picture is generic for the Uni Filter NU-2366.
Shafer is offline   Reply With Quote


Old December 29th, 2022, 07:27 AM   #5
Norway
ninjette.org member
 
Name: S n 0 r r
Location: Stjoerdal, Norway (San Diego, CA, USA, 2015-2016 , Bielefeld, Nordrhein Westfalen,Germany 2021-'22)
Join Date: Sep 2012

Motorcycle(s): TMZ 5.952 "Tula" 200, Ninja 250 -Special ed. '11, ZZR 1400 (ZX14), Honda CB 1100 F Super Bol D'or

Posts: 123
Quote:
Originally Posted by floggolf View Post
Do you wash and re-oil your filters?

I think the manual sez you can do this 5 times.

If the china foam doesnt get gooey or turn to crumbs, I don't think there would be a problem, as long as the pores in the foam are the same size.

The FAQ at Ninja250.org sez the foam filters perform as well as the oiled cotton and other types.

I just bought a china foam filter, but won't put any run time on it until spring and I live near a rain forest. The air is pretty clean.
I have never washed and re-oiled any airfilter. Wasn't aware of the possibility. Thanks for making me aware. I'll check closer..
Norway is offline   Reply With Quote


Old December 29th, 2022, 07:30 AM   #6
Norway
ninjette.org member
 
Name: S n 0 r r
Location: Stjoerdal, Norway (San Diego, CA, USA, 2015-2016 , Bielefeld, Nordrhein Westfalen,Germany 2021-'22)
Join Date: Sep 2012

Motorcycle(s): TMZ 5.952 "Tula" 200, Ninja 250 -Special ed. '11, ZZR 1400 (ZX14), Honda CB 1100 F Super Bol D'or

Posts: 123
Quote:
Originally Posted by thedrewski86 View Post
I run a foam Kawasaki filter that I got on ebay for $10. I also have a cheap foam no-name filter that was about the same price - I had to trim it to fit but it worked fine too. It's a spare because I would rather run something that came out of a "Kawasaki" box, all other things being equal
I have always been a fan of running factory-spec air filters. If it's still in good shape and needs oil, error on the side of oiling it lightly. Too much happens fast.
Thanks for your thoughts on this. I need to do more research on the topic..
Norway is offline   Reply With Quote


Old December 29th, 2022, 07:32 AM   #7
Norway
ninjette.org member
 
Name: S n 0 r r
Location: Stjoerdal, Norway (San Diego, CA, USA, 2015-2016 , Bielefeld, Nordrhein Westfalen,Germany 2021-'22)
Join Date: Sep 2012

Motorcycle(s): TMZ 5.952 "Tula" 200, Ninja 250 -Special ed. '11, ZZR 1400 (ZX14), Honda CB 1100 F Super Bol D'or

Posts: 123
Thumbs up

Quote:
Originally Posted by Shafer View Post
I would suggest getting a Uni Filter NU-2366 for the pregen and oiling it with Belray foam filter oil. (A little goes a long way, don't put it in soaking wet)

The air filter is your only defense from sucking stuff into your carbs and engine. Plus the filter takes a bit of effort to get to, just get a filter you don't need to worry about.

You can get the filter off Amazon for $20. Amazon's filter picture is generic for the Uni Filter NU-2366.
Thanks for the advice. Now I'm also aware of "NU-2366"..
Norway is offline   Reply With Quote


Old January 6th, 2023, 05:27 PM   #8
Bob KellyIII
Retired motorcycle Mc.
 
Bob KellyIII's Avatar
 
Name: Robert
Location: Weed, California.
Join Date: Jul 2021

Motorcycle(s): 2012 Kawasaki Ninja 250R, 2021 CSC TT250, 1977 Triumph Bonneville 750cc & 2021 CSC RX4 450cc

Posts: A lot.
What you described on the beginning of your post isn't necessarily related to the air filter , but dirty carburetors ! just letting the bike sit with gas in the carbs over the winter can and will gum them up in a bad way....
for over the winter storage I always use a generous amount of sta-bul 360
fuel stabilizer/preservative ....
if you didn't drain the carbs and make sure the gas was not leaking into the carbs past the vacuum operated petcock ( this was where I had problems the leaking petcock refilled the carbs for me!) and use a fuel stablizer too ! you probably have dirty carburators... and the only way to get them clean again is a major tear down of everything on the carburator and clean it by hand...
and use an ultrasonic cleaner and a soda blaster on the internal lines inside the carbs... replace o rings and re assemble and hope to hell you got it all clean again...... I attempted to clean my carbs 3 times the last time I cleaned them was fairly successful I ran it like that for a summer... but it still wasn't perfect
and I knew it... so I pulled them off and sent them to Gordon , Ducattiman
here at this site.... I know carburators ! I am a Retired motorcycle mechanic... but these carbs are the hardest to clean of any bike I have encountered ...so I opted to the expert and let him do it and I am glad I did !
....
these carburators will gum up quickly the passage ways are tiny and the filters that are stock are inadequate to keep the dirt out... thus you get crappy running after the first year...
I think adding a better inline filter would help alot and obviously
properly prepairing for the winter storage...
....
todays fuel does not last that long.... so for my bikes I have been routinely adding Sta-Bul 360 to all the gas on my property....
....
Years ago
I had a 5 gal. can of gas that I had bought in the spring( no stabilizer added of any kind) , and hadn't used it
till late fall or the first of winter.... I put it in the tractor and it fired up but promptly died... over the next 2 days I found the problem... the gasoline wouldn't even light with a match !!!! I drained the gas tank bought new fresh gas and it fired right up and ran like a top....

with gasoline that deteriates so fast now days it is a problem with small carburetors, the smaller the carb, the tinnier the holes inside and when that gas starts clumping up it will plug up those tiny holes.... then the carb doesn't work any more and is dubbed "Dirty !"
and I really think that is the problem here... not a dirty air filter !
.....good luck !
Bob........
__________________________________________________
Its too late when you've gone too far !
Bob KellyIII is offline   Reply With Quote


Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Anyone try the cheap windscreens from AliExpress Gearbox Paul 2008 - 2012 Ninja 250R Farkles 9 October 1st, 2020 02:35 PM
Has anyone used the Uni Air Filter Service Kit or something similar? Insane Pie 2008 - 2012 Ninja 250R Tech Talk 2 September 14th, 2014 06:46 AM
Air Filters 102dalz 2008 - 2012 Ninja 250R Tech Talk 2 September 18th, 2013 06:42 PM
[sportrider - latest stories] - K&N Air Filters Named as Official Air & Oil Filter Su Ninjette Newsbot Motorcycling News 0 June 11th, 2012 06:00 PM
Air Filters? mista350z 2008 - 2012 Ninja 250R Tech Talk 3 July 29th, 2009 04:03 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Motorcycle Safety Foundation

All times are GMT -7. The time now is 05:24 AM.


Website uptime monitoring Host-tracker.com
Powered by vBulletin®
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2023 DragonByte Technologies Ltd.
Except where otherwise noted, all site contents are Copyright 2022 ninjette.org, All rights reserved.