OzVMX Forum
Marque Remarks => Yamaha => Topic started by: Graeme M on January 01, 2015, 09:16:01 pm
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I am finding it hard to track down a good airfilter. I have a 2-stage Uni filter right now, and recently bought a TwinAir one. the TwinAir filter is the right one according to their website but will not fit, it's just too big for the cage. Neither it nor the Uni had a hole for the retaining bolt which is strange - I burned one in using a soldering iron on the Uni. I have bought another Uni but it clearly has no hole either.
Has anyone else experienced this? I checked on Partzilla and the airbox diagram looks just like mine so my airbox is a stock 175G one. It's strange as I owned an IT back in the day and do NOT remember the airbox being so awful...
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Aha!! I think I have just answered my own question! This photo from another thread shows the cage from a 125G. Now I am pretty sure the IT and YZ125 share the same airbox/filter, and the cage in this photo is way bigger than mine. Perhaps I have a cage from some other model?
(https://lh6.googleusercontent.com/-ylTjG2dgerI/U3iHTsbuJbI/AAAAAAAAApI/tk8D0CXDSj8/w2078-h1558-no/20140518_074702_1.jpg)
Edit:
Now I am confused... Here's an IT175H airbox - the cage here looks the same size as mine, yet it's clearly smaller than the one in that 125G. Anyone? US/Oceania model difference?
(http://i.ebayimg.com/00/s/MTA2NlgxNjAw/z/zwYAAOSw7ThUmeNp/$_57.JPG)
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To my knowledge and in my experience the 80-81 yz125 and IT175 have the same filter cage and air box and lid. Except the top is cut open on the yz where the IT one is smooth and round at the twin peaks either side of the shock
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according to Boats.net the YZ125 G and H are the same part number...the IT 175 H is a stand alone part number.. which is the bit that confuses me as i have IT 175 G and H and the parts to my eyes are the same
cheers
tony
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The parts listings on boats and partzilla aren't quite right, but I think the airbox/filter/cage are the same for 125G/H and IT175G/H. I am just not sure why I have a TwinAir filter for exactly those models and no way is it right for my IT175. My Uni filter is the right size but doesn't have the hole for the threaded locating rod - why on earth make a filter without the right locating hole???
The only thing I can think of re the apparent size of the filter is that for some markets the cage and element is larger (or maybe in 81 they made the part larger?). That one is larger seems to be the case looking at the pics above, but hard to be certain.
I guess I'll just try to return the TwinAir or sell it off... tho quite who'd want it I dunno.
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i've been getting my filters from ini filter US for my 425 and 250 G and so far all has been well...could there be a part number differance between the US and Oceania??......... i will need some for the 175 and 125 soonish so i'll keep an eye on this thread ;D
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I'll pull mine out tomorrow Macca and check it out. My 125G unifilter came with the bolt hole in it whereas the 250G/H filter doesn't have a hole as the cage has lugs on it on the carby side. I did notice in their catalogue pic that they have changed since I got mine and the the one in their pic hasn't got the hole :o
http://www.uniflow.com.au/contents/en-us/d78_02.html
http://www.ebay.com.au/itm/Uni-Air-Filter-Yamaha-IT175-1980-1981-YZ125-/291089268066?pt=Motorcycles_Parts_Accessories&hash=item43c645bd62
cheers
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Maybe they are just lazy re the hole? That Uni one you linked to is what I have already but it's getting a bit old, so I was chasing a better one - I like the Twin Airs.
Woody, can you measure the diameter of the base of your cage? I'll compare it to mine. However if you are using the NU2247ST Uni filter, then your cage will be the same as mine as that filter fits right. The Twin Air one though is significantly bigger. I bought a 152400 Twin Air which is correct fitment on their website for 80/81 IT and YZ.
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Hi Graeme
I too had this issue as the 125G I picked up had a bastardised air filter/cage. I have since found a 1980 175G full air box from the USA & fitter that, so all good now.
As for the elements, again, same issue. I have a couple of the red/black Uni NU2247ST which fit well but also purchased the yellow/green NU 2245ST & its way too bulky to use in the air box, so will not get another one of them. The outer section is the problem so I am going to use the inner first layer only & make another outer section as per the 2247ST.
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That airbox is a shocker! Well, I'll just have to stick with the Uni 2247ST and make my own hole I guess. No idea what this Twin Air filter actually fits though - it's not just that it's bulky but the opening is simply too wide - the sealing foam won't actually sit under the cage! Says 80/81 IT175 on the bag though, so go figure.
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Just checked from my old orders to make sure 100% that we are talking about the same one & yep, it sure is :(
Air Filter Element 80-82 YZ125/250/465 & IT175 80-81 IT250/465 81-82 NU2245ST
Wont be buying another one
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Suzuki drz400 air filters fit and quite easy get in different brands ,not sure off year just went looking for similar shaped air filters and it worked for us currently on a g and h.175.ELC hunter
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Good info thanks for that. Will have a look at those for sure.
This one looks pretty good:
http://www.ebay.com.au/itm/HIFLOFILTRO-AIR-FILTER-FOR-DRZ400-DRZ-400-DRZ400E-DRZ400S-DRZ400SM-HFF3015-/311217774682?pt=AU_Motorcycle_Parts_Accessories&hash=item487606605a
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Yes I have used filters out of my 98yz250 and my old wr426 in 175G they fit the frame well and seal tight, a little tricky to feed in through the little side hole though.
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Yes, I've got the NU2247ST Uni filter. It fits ok but it's very large for the tight fitting airbox as you can see below. I prefer Twin Air but can't find one for the 125/175G/H in their application chart, where'd you get that one Macca? I might try the Twin Air for the DRZ400, I'm sure you could get them at CMC for $30
diameter of bottom of the cahe is 15cm approx
cheers
ps I think I'll put some fuel in the YZ tomorrow and razz the neighbours 8) they shouldn't hear me over the Summernats burnouts anyway ;D
(http://i380.photobucket.com/albums/oo249/vmxwoody/YZ125G/image2.jpg)
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Thanks Woody, mine is 15cm too. Here's the twin Air application chart, look for 152400.
http://www.twinair.com/worldwide/images/stories/Twin_Air_Application_Guide.pdf
But don't buy one, it won't fit...
Digga, Woody, what do you make of this?
NU-2245ST from Uni Australia is the green and yellow one for the IT175G that I am using now.
NU-2245ST from Uni Filter US is a black and red one for the YZ/IT 250/465 (and IT175G/YZ125G?)
NU-2247ST from Uni Filter US is a black and red one for the IT175G/YZ125G
All very strange, I am now thinking there ARE two possible cage/filter combos for the 175G.
Here's the 2245ST green/gold one:
(http://www.uniflow.com.au/contents/media/l_nu%202245st.jpg)
http://www.uniflow.com.au/contents/en-us/d78.html#p1107
2245ST black/red:
(http://192.185.52.208/~faymyers/R2R/400x400/8cc67db619cb52dfecfb88f45e5c5391.jpg)
http://www.ebay.com.au/itm/Uni-Air-Filter-NU-2245ST-/390532013032?pt=Motorcycles_Parts_Accessories&hash=item5aed859be8
2247ST black/red:
(http://i.ebayimg.com/00/s/NDg5WDYwMA==/z/JioAAOxyGwNTDWeE/$_12.JPG)
http://www.ebay.com.au/itm/Uni-Air-Filter-Yamaha-IT175-1980-1981-YZ125-/291089268066?pt=Motorcycles_Parts_Accessories&hash=item43c645bd62
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Guys
I got mine (2247 ST) via DC Plastics & they are still on their website @ USD$26.95
http://www.dcvmx.com/xcart/product.php?productid=17410&cat=331&page=3
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BTW, I also use the yellow one (2245 ST) without the second layer & it fits OK then ;)
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Yes, I've now bought a 2247ST so fingers crossed it's a goer. Uni US shows the 2245 for the 250/465 and the 2247 for the 125/175. I think Twin Air are mistaken in their application, so my advice is don't buy one for the 125/175...
http://www.unifilter.com/online-catalog/
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Re: the hole.
YZ125G (and presumably H) filters are held in by the cage, via two wingnuts on the OUTSIDE of the airbox (on the carby side). So they're not meant to have the conventional single hole.
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Re: the hole.
YZ125G (and presumably H) filters are held in by the cage, via two wingnuts on the OUTSIDE of the airbox (on the carby side). So they're not meant to have the conventional single hole.
Nath, that's the 250/465's, the 125's definitely have the single bolt mount at the top of the filter inside the airbox. Macca, the 2247ST will fit.
http://www.partzilla.com/parts/search/Yamaha/Motorcycle/1980/YZ125G/AIR+CLEANER+YZ125G/parts.html
http://www.partzilla.com/parts/search/Yamaha/Motorcycle/1980/YZ250G/INTAKE+YZ250G/parts.html
(http://cdn.partzilla.com/diagram/yamaha/MCY/1980/YZ125E_F_G/IMAGES/AIR_CLEANER_YZ125G.png)
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Correct Woody
Someone had wrongly fitted a 250/465 into my 125G & it was a dog's breakfast ::)
Now that I have got a 175G box in there with the right cage etc, all is good ;D ;D ;D
Couldnt find an NOS or 2nd hand 125G one anywhere, so the 175G was a winner (exactly the same)
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I had two 125Gs with the two bolt/250 style air filter set ups in them.
Maybe a mid-year change?
This could explain why the filters are wrong.
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I had two 125Gs with the two bolt/250 style air filter set ups in them.
Maybe a mid-year change?
This could explain why the filters are wrong.
Those bikes must have been modded by the prior owners to take the 250 cages. The same airbox carried through to the H roller that I had.
http://www.partzilla.com/parts/search/Yamaha/Motorcycle/1981/YZ125H/INTAKE/parts.html
(http://cdn.partzilla.com/diagram/yamaha/MCY/1981/YZ125H/IMAGES/INTAKE.png)
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Mind you Woody, going by that diagram the H airbox must have been slightly different - check part #18. That suggests the cage retaining strap inside was made to be less difficult to manoeuvre the cage over....
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Yeah that shows the thread in the plastic disc bit is a bolt, mine all have a pressed in brass thread and the bolt sticks out off the retaining hoop in the air box
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Yep.
Definitely some weird stuff with those G/H airboxes! Well, let's see how this Uni filter I bought goes. I'll try to return the Twin Air filter and point them at this thread if I get any issues, but the seller would be right to say that Twin Air have marked the item as IT175G/H so how would he know any different?
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I took a look at several G and H air boxes, both for YZ125s and IT175s, that I have and it confirms that there are two different lock nut styles. G's thread onto a fixed bolt coming out of the box bracket and H's have a threaded arrangement as per #18 above.
In either case, the cage and hence the air filter are the same.
Rod