Product: Ketofa 110cc 125cc 150cc 200cc Gy6 Moped Scooter Atv Dirt Bike Motorcycle Air Filter 42mm
Overall sentiment: negative
Customer reviews:
The rubber seal that connects to the carburetor is torn. Now outside air leaks in. This is no surprise as this is cheap Chinese junk. 
 Ok this is being edited after running it for almost a year now. First off the included hose clamp is junk. It started rusting pretty fast and got to where it was stripping out and not clamping. Got to where The filter would pop off all the time. Replaced that and now the filter has come apart. All I'm left with it the rubber part. Can't even find the filter to try to rig it until the UNI filter arrives. No telling how long my son rode without the filter on his buggy. 
 Not worth the wait 
 It would a nice filter but the top cap is not thoroughly glued. That means dirty air will be sucked into the engine, ruining your engine. It will cost me another $6 buying epoxy/glue to fix it. Buyer beware. 
 Cheaply made. I knocked the filter off the plastic hose putting it on. I glued it back together and after 2 days of running it found dirt and grass in my carb. 
 cap fell apart in no time.  turned purple/brown.  hose clamp was a joke.  IT IS WHAT PAY FOR.  If yo ucare about your bike get a K&N and you can clean it for a decade 
 At first I loved the air filterm but after 5 months of using the filter, I now need a new head. The filter let small dirt particles into the engine causing the oil to become liquid sandpaper. Now I'm out 250 bucks from a 10$ filter. Buy a quality filter and spare future engine problems. 
 There is a small hole in the filter with a large rubber bushing installed. Clearly not a 'performance' part. 
 took nearly 3 weeks for it to get here, finally comes, the packaging is less then desirable (would it kill you to trow some bubble wrap around it?) upon closer inspection, the rubber 'boot' that holds the filter to the carb, its..well...glued in with some rather stiff epoxy....might want to use flexible epoxy...this glue allows for air leak, filter wobble, and horrible performance.

seller also thinks its ok to leave a note stating "rate us 5 stars"

ill review you and rate you what i see fit, sell a good product - get a good rating

if it wouldnt cost me so much to send it back, and if it wouldnt take 10 years to get another one, i would.......

look elsewhere. 
 Junk. Came right apart in my hands AND is much much smaller than the stock air filter. No way this is better than stock.