TRX250r.org

Author Topic: Air filters  (Read 286 times)

Offline atvmxr

Air filters
« on: January 17, 2020, 10:34:52 AM »
What air filters are you guys using these days.  My old setup was a K&N with a Uni wrap on the outside, but they havent made those since James Lucky went tits up.  Been using Uni quite a while since, but the last year or 2 the quality has gone to shit.  rubber boots crack, glue comes apart at the seams, etc.  Id switch to Twin Air, but they dont make one for the TRX250r. 

using no toil maintenance system. 


just checking if maybe there is a new option I havent heard of. 
Bunch of race quads that run on premix

Online The norm

Re: Air filters
« Reply #1 on: January 17, 2020, 11:00:23 AM »
So I run K&N with an outerwears cover.  I ride in the Oregon dunes exclusively with my R. Uni used to make a great filter, too bad their quality has gone down hill.
1986 Trx250r-- Hybrid Engineering 391(Good bye super 310)
1986 Trx250r-- Hybrid Engineering  ported stock 86 cylinder
1986 Trx250r-- craigslist engine with unknown ported 89 cylinder.
1985 Atc250r-- Needs a lot of work (Super 310's new home)

Offline broken1

Re: Air filters
« Reply #2 on: January 17, 2020, 12:13:55 PM »
Looks like no toil makes a twin foam filter for the R under pn 320-16: https://notoil.com/product-tag/honda-trx-250r-fourtrax-250r-1986/
overkill is an often underrated achievement

Offline Langbolt

Re: Air filters
« Reply #3 on: January 17, 2020, 12:56:36 PM »

Offline 2ndmoto

Re: Air filters
« Reply #4 on: January 17, 2020, 08:43:39 PM »
Twin air or k&n

Online havinnoj

Re: Air filters
« Reply #5 on: January 17, 2020, 08:48:02 PM »
I've ran K&N's from Eddie for years on a bunch of motors, always been great.  I'm running a S&B filter on the 443 with the Robl/Vision Air intake.  S&B quality appears to be very good.

Offline Piney0

Re: Air filters
« Reply #6 on: January 18, 2020, 12:00:25 AM »
I noticed the same thing with Uni filters recently.  I'm going to have to try something else also.  I only got 1 year out of my last filter before the glue started separating.

Online desertR

Re: Air filters
« Reply #7 on: January 18, 2020, 02:12:29 AM »
I run mostly K&N filters. My quad, truck (tow rig), motorcycle and my son's Honda. My track car runs a custom JBR dry filter like, a K&N. My utility quad has a oiled UNI filter. My off-road rigs and my "other" Truck all run stock filters and get them changed often. I'm not a big fan of K&N's but sometimes it's all that does the job. K&N's are often over oiled and cause damage to Mass air sensors.
desertR

Online croat1

Re: Air filters
« Reply #8 on: January 18, 2020, 02:34:07 AM »
Twin air filter number is 150902.  Iíd have to guess UNI has a universal filter wrap for the K&N.  An option is to buy a sheet of UNI filter material and make your own wrap.

Joe

Online croat1

Re: Air filters
« Reply #9 on: January 18, 2020, 02:35:58 AM »

Offline 2ndmoto

Re: Air filters
« Reply #10 on: January 19, 2020, 11:05:33 PM »
For those of you having issue with filters separating, be cautious of the cleaner you use. It is a possibility that it is eating the foam/glue.

Offline 2Nubs

Re: Air filters
« Reply #11 on: January 20, 2020, 06:38:27 PM »
Crazy that there is not a paper filter thatís up to the task. Always seemed so crazy to me that the oiled cotton is a no no in automobiles sports, but itís the go to for bikes and quads. Maintenance is the key I suppose. I was always religious with cleaning my Uniís.
Ď86 330

Online desertR

Re: Air filters
« Reply #12 on: January 20, 2020, 07:30:15 PM »
I think oiled cotton is the go to, because the options are slim to none. Also motorcycles, on and off road/quads get used very little compared to the daily driver that might go 20K a year.
desertR

Offline wilkin250r

Re: Air filters
« Reply #13 on: February 12, 2020, 01:54:11 PM »
I've found paper filters to clog too easily.  They work fine for cars because your car isn't really seeing the dusty conditions that offroad filters see.

I don't know about all Polaris quads, but the Polaris Trailblazer (which is basically a full-sized kid's quad) comes stock with a paper filter, and that sucker just clogged up all the time until I tossed it for a foam filter.

Offline Langbolt

Re: Air filters
« Reply #14 on: February 13, 2020, 09:34:01 AM »
Twin air filter number is 150902.  Iíd have to guess UNI has a universal filter wrap for the K&N.  An option is to buy a sheet of UNI filter material and make your own wrap.

Joe

Hey Joe, I bought a Twin Air a few years ago.....and it's smaller than the OEM filter ??
https://www.denniskirk.com/twin-air/foam-air-filter-150902.p301142.prd/301142.sku

I see MOOSE makes one too....and it comes pre-oiled! ;)
https://www.denniskirk.com/moose/precision-pre-oiled-air-filter-1011-2552.p306995.prd/306995.sku

:D

 

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