Honda air filter

[Mick In VT]

When I ordered an exhaust gasket from Revzilla, I thought I would add an air filter since I was already paying $8 shipping on a $4 part. The filter cost $8 and change and was in stock. Shipping was fast. I ride a lot of dusty dirt roads, and for the small amount of money, I’ll probably rotate out the filter more frequently than recommended (just like extra oil changes - at 3/4 of a quart, why not?). I probably shouldn’t have been surprised by the size of the air filter, but I was! The ratio of plastic to filter is high.

 

[dmonkey]

There are at least two different aftermarket filters available with more filter surface area that would catch dirt.
1) Hurricane Racing Performance P/N: HM-8187

PCX125-150 INJECTER INSTALL

Put in grom, pcx 150 injector tonight. Also removed snorkel, Knocked out screen, in spark arrester. reset computer by unhooking battery. It topped at 49-50. 51 if i tucked down. Pretty loaded up with engine guard, middle rack, headlight rack, and protector, saddle bags. At only 750 miles, and...

hondatrail125.com

2) Takegawa Power Filter P/N: 03-01-0033

SP TAKEGAWA : Power Filter (Replacement of Stock Element) [03-01-0033]

I have the Hurricane Racing filter because the black material is more of a flexible rubber than hard plastic it took some patience to get it to stay in place when putting the other half of the air box back on. If I were buying a replacement filter right now I would go with the Takegawa one.

There is also an S.K.A. Air cleaner that fits the CT125 but it's just a stainless screen, so not suitable for dusty riding IMO

⚠️ Warning about the S.K.A Auto air cleaner / air filter

Just a heads up for anyone considering the "SKA Air Cleaner Intake Filter Honda CT125 Trail 125" that Beez Deals sells, it's just a stainless steel wire mesh filter. This means the filtration area will flow very well, at the cost of not filtering well. Didn't realize this when I bought it, I was...

hondatrail125.com

 

[AZ7000']

No foam for me...

 

[dmonkey]

No foam for me...

Why is that? Foam filters are usually the middle ground compromise that is preferred for dirty conditions. In general cotton gauze & wire mesh (K&N) flow the most air per surface area, foam (UNI) the middle amount, and paper the least. Gauze & wire mesh let the most fine particles through, foam the middle amount, and paper the least. For clogging paper often clogs first, then cotton & wire mesh, then foam due to its filtration depth. Obviously this varies by brand and filter type, but it's why UNI filters are so popular in dirty conditions where people aren't racing for titles and dumping $$$ into frequent motor rebuilds.

 

[Mick In VT]

Thanks dmonkey, the Takegawa looks appealing- lots more filter area. Next order from WeBike…

 

[AZ7000']

Why is that? Foam filters are usually the middle ground compromise that is preferred for dirty conditions. In general cotton gauze & wire mesh (K&N) flow the most air per surface area, foam (UNI) the middle amount, and paper the least. Gauze & wire mesh let the most fine particles through, foam the middle amount, and paper the least. For clogging paper often clogs first, then cotton & wire mesh, then foam due to its filtration depth. Obviously this varies by brand and filter type, but it's why UNI filters are so popular in dirty conditions where people aren't racing for titles and dumping $$$ into frequent motor rebuilds.

I dont ride it enough to need the performance advantage of the foam... Like you stated, paper lets the least amount of fine particles through. The oil (if you oil it) does dry out and I'm not needing another of the 7 bikes to maintain on a strict schedule. Paper works fine for our cars and my 125.