KOSO Motorcycle Air Cleaners / Air Filters Reviews

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KOSO

12 Nov 2023

Racing Element

Fits: YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X

Japanese Webike user

5/5

Changed from Red to Black

[How is it used?
The same product in Red was used, but due to the increase in mileage and the change in body colorImage, it was changed to Black.

Was the one you received as per Image?
The bolt has been changed from this product's Included Parts:to Posipolini's M5 Bolt, and the black-colored Filter Frame has been changed to give the image a sense of massiveness.
Black suits Monotone's body color.

Was the installation difficult?
I have been using the bare spec. without OEMAir cleaner cover for some time, so I can replace it with Bolt On.
Since the Bolt on the Left is deep, there is a hole for maintenance on the Cowl, and if the Cap is removed, it is easier to turn the hexagon.
I leave the Cap off because of how often I change it due to weather.

How was your experience with it?
We have been using this product for some time, and when we use a new product immediately after replacement, we feel good about the Response.
It also goes well with the BEAMS R-EVOFull Exhaust System.
The intake sound is pleasant.
We are currently using the higher density Filter of the two Filters.
Since a low-density filter can be replaced by disassembling the filter frame, a new low-density filter will be attached to the removed Red, and the Red will be reused in a form that can be changed depending on the situation.
The filter I used does not have any tears etc., so I think I can reuse it by washing it.

[Included Parts:were they on?
Includes six M5×40mmBolt.
The length is long enough to accommodate the thickness of the OEMCover.
I have changed to Posipolini and am not using it.
The Instruction Manual describes the PowerCheckCurve, and the changes in usage are clearly visible in the Graph.

[Was there anything that disappointed you?
Not to disappoint, but there used to be an inexpensive product that was for sale, without Filter Frame and with only 2 Filters, but now this Quantity:There is only Set.
It would be great if you could resell it since it is a consumable item. View detail

KOSO

28 Aug 2023

Racing Air Filter

Fits: HONDA GROM, HONDA GROM, HONDA MSX125, HONDA MSX125SF

Japanese Webike user

5/5

Easy to install with excellent cost performance ◎

■ Product features
This is a Type product that replaces the air filter in the OEM air cleaner box.
The OEM Air Filter is a paper type, but this product is a mesh type, so the air permeability of the material itself is high.
The filter area is also quite large, so the air in the air cleaner box will be almost at maximum efficiency.

■ About installation
If you only need to remove and install this product, you do not need to remove the Cowl because you can remove the Cover by inserting your hand through the gap in the Front and turning the Screw.
However, if you want to replace or remove the Air ductHose, you would need to remove the Left Side Cowl.

About ■Filter
The filter has a rough and fine filter, but we use the fine filter because we do not have a Merit that uses Sugar Crystal due to the suction resistance inside and outside the box, as described below.
I'm going to go a little off topic, but I think it is important, so I will briefly describe my findings.
We hope this will be helpful to those who are purchasing.

■About suction resistance
By installing this product, the resistance caused by the air filter when passing from the cover of the box to the box body can be reduced, and the change in the material of the filter and the increase in the area of the filter aim to increase the air passage rate through the filter. The air filter is designed to be more efficient in passing air through the filter.
However, in the case of the Grom, it is not the resistance of the Air Filter that is the problem for increasing suction volume, but the resistance of the Air DuctHose that sucks air into the box and the inside diameter of the Intake Pipe that sends air to the Throttle body that is the Neck. If the resistance of these parts is not reduced or the bore diameter is not widened, the improvement in suction volume cannot be achieved.

Suction Duct to Air cleaner
The Large Diameter Air DuctHose is a third-party product that is marketed by removing the OEMHose, modifying it to widen the bore, and installing the Hose. Personally, I have been resisting the idea of installing a Hose in the first place, and I don't think it is necessary in the first place, so I have removed the OEM Hose and am using it. The direction of intake is changed, but from the position of the box, I think it is better to inhale from the top because the suction temperature is lower. "Ngooooo." and sound, but the volume is not so loud that it can be heard by those around him, and if he does not mind, he can remove it.

Intake Pipe from Air cleaner to Slovo
The InnerIntake Pipe inside the box, or InnerIntake Pipe as it is called, can be disconnected from the HRC Grom due to a regulation revision a few years ago. Removing this connection shortens the length of the hose and improves the suction resistance from the inside of the box to the throttle body a little.
Looking at the Net article, I see that some people have put a RACINGFunnel here, but in my personal opinion, I think that adding a funnel looks beautiful, but has little effect on performance.
Adding a funnel narrows the entrance diameter by the amount of funnel, so even if you have reduced the resistance, you may have to increase the resistance again.

■Precautions for installation
OEM filters are installed in a way that they fit inside the box, but this product is sandwiched between the body of the box and the cover, so the outer diameter of the box is larger and the capacity itself is increased. Therefore, please be careful if you have replaced the Horn with a third party product, as it may get stuck.
Also, removing the Duct and Hose above will improve the Torque depression above 6500 RPM a little, but Response at low RPM will be just a little worse.
Also, if this is done with the OEM exhaust system, the air cleaner may sometimes make a banging sound when blowing back, so it is recommended to properly balance the intake and exhaust air (i.e., replace the exhaust system). View detail

KOSO

14 Jul 2023

Hurricane Multi Air Filter

Fits: YAMAHA NMAX, YAMAHA NMAX 155, YAMAHA NMAX155

Japanese Webike user

4/5

OEM to Koso

BirdCity125 (SEC-1J) mounted on
Exhaust System with good venting Beams Corsa Evo (originally for Nmax) After changing to Koso HURR, I found that there was a serious lack of torque due to insufficient mixture and the engine would often not start. However, I thought that I should change the air cleaner filter to something that can take in more intake air than the OEM if I had put in an exhaust system with such a good extraction and touched the fuel adjustment.
As described in the Instruction Manual, the finer filter is used from the beginning for the Quantity:The set was installed as it was first.
Unfortunately, there was little difference in the way the OEMs felt the difference.
This is because the drive system is already ….
Koso Lightweight Drive Face
Koso PowerPulley (8g×3+11g×3 Weight rollerSetting)
Koso Lightweight Clutch (Winner Spring also tried 1000rpm&1500rpm and decided that OEMSpring's Clutch in was better for basic city commuter Ride, so OEM)
Koso Clutch outer cover
Koso Reinforced Center Spring (1000rpm)
LongTorque Camshaft Pin
Reinforced Belt made by KN Planning (Because the Torque Camshaft Pin was changed, it was necessary to make a longer Belt.)

I wonder if it is not a Level where you can feel a large difference only by using Filter.
In addition, the fuel setting with this air filter has not yet been properly set.
Therefore, it is difficult to evaluate FilterSingle Body, but I would like to try a rougher filter, and if there is a difference that can be felt when the fuel setting is determined, I would like to add it again.

The only thing to look at is that it has become Accent with a single red line in the middle.
Installation takes less than 5 minutes.
Unless you also want to do internal cleaning while you are at it. View detail

KOSO

15 Mar 2023

Racing Air Filter

Fits: HONDA GROM, HONDA GROM, HONDA MSX125, HONDA MSX125SF

NO NAME

5/5

Best value reusable high efficiency air filter

About quality and texture, I can confirm that the quality is great and that the material used is a coarse sponge for the filter and a hard plastic for the filter frame. About the feeling of use, This air filter is highly efficient when used with the original air cleaner box and compared to using the original air filter with the same setup. The ability to reuse the sponge filter also makes it the best value air filter available. Products to buy together, If you are looking for good performance from the original air cleaner box then you will be needing to add the larger diameter air duct to your cart. Difficulty of installation, I can say the fitment of the air filter for my installation was very easy due to the ease of access to the cover of the air cleaner box that needs removing before simply placing the air filter in and installing the cover to secure the air filter in place. Cost performance and comparison with other products, The pricing of the product is the best. You receive an air filter made from quality materials that can be disassembled, cleaned and reused for thousands of miles. This air filter is much cheaper then other reusable air filters and more efficient then other similar priced disposable air filters. About shipping and packaging, My order was shipped within 48 hours of me placing the order and I received a few emails advising me of the status up until the order was dispatched. I find the link supplied to track my order very useful and the order arrived within the estimated date range. Any concerns, cautions, or advice when purchasing, I have no concerns or cautions when purchasing from Webike. I cannot recommend Webike enough for the majority of your biking needs. They not only sell aftermarket parts and bike gear but also OEM parts for your repairs and servicing needs. View detail

KOSO

27 Feb 2023

Racing Air Filter

Fits: YAMAHA NMAX155, YAMAHA NMAX125, YAMAHA NMAX155, YAMAHA AUGER, YAMAHA FORCE2.0, YAMAHA X FORCE, YAMAHA BW'S125, YAMAHA CYGNUS Gryphus, YAMAHA CYGNUS Gryphus

Japanese Webike user

4/5

It is easy to install. Fee Ring is also …?

Installation is easy with Phillips Screwdriver, 1 pc for easy replacement.
Driving Fee Rings Say Ha Drill Full throttle, full throttle Rider. I was thinking of going to... (Lol)
Response from medium speed is quite good, and I have a problem that I want to open Axel;
Another thing I noticed is that the low-speed Torque has become a little thinner.
This area may still need to be set up with a fuel conditioner!
By the way, my NMAX is "SP Tadao" The rest of the engine and drivetrain are all NORMAL. (Lol)
Perhaps a Normal muffler would be a better match?
The intake sound is quite nice, so even if you are a normal muffler rider, you can still enjoy the sound of the intake air. A little more powerful Sound…" I'm sure Rider will be able to find a way to make it an Exactly Item!
Really nice in that it's easy to install and you can feel the difference from the NORMAL!
For myself, I am a low speed Torque and Start dash oriented person, so I will give it 4 stars. View detail

KOSO

27 Mar 2022

KOSO Racing Air Filter

Fits: YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X

Japanese Webike user

5/5

If I change the Exhaust System, this is where I want to put my hands.

I purchased it when I replaced the Exhaust System, and I like the intake efficiency better than the Filter type, and I also like the black air cleaner box and the red one point. Now I wonder how the durability of the sponge part will be. View detail

KOSO

20 Feb 2022

KOSO Racing Air Filter

Fits: YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X

Japanese Webike user

5/5

The intake sound will be cool.

It is used for CYGNUS X type 2.
I've been using it since the days of the normal engine, and it seems to increase the efficiency of the air intake considerably, and the intake sound becomes more explosive.
Even a normal muffler vehicle can be quite noisy, so be careful if you live in a noise-sensitive environment.
It is said that just replacing the large engine will increase the power by about 0.5 horsepower.
In particular, a larger diameter throttle body, a sub computer, and a full computer will increase the power.
The internal Filter is also removable for easy cleaning.
OEM filters can only be replaced with assemblies after a certain period of use, but with this product, only the filter part can be removed, cleaned, and reused.
This is very helpful for Scooters, as their air intakes are close to the ground and tend to draw in dust and impurities, which can easily contaminate the Air Filter.
Because of its low price, it has become a standard custom in the CYGNUS community.
I am currently running a high camshaft + high compression head spec. with a bored up engine, and I think this product is sufficient for air cleaner. View detail

KOSO

20 Feb 2022

Big size air cleaner duct

Fits: YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X

Japanese Webike user

5/5

Bore up to the vehicle.

It was used for CYGNUS X type 2.
I bought this as an update to my OEMAir cleaner box because I was told that the intake volume was not enough when I upgraded to 160cc and installed a High Camshaft + High-Compression Head.
For installation, it is necessary to remove the duct of the OEMAir cleaner box and enlarge the mounting holes to fit.
It is very easy to get a used OEMAir cleaner box in advance and finish the integration process.
This product will increase the intake air volume much more than changing the air filter, because the pipe to be introduced into the air cleaner box will be almost twice as large in diameter.
In addition, no matter how much you improve the efficiency of the air cleaner box, it will not be effective if the throttle body is NORMAL, so the throttle body must also be Large diameter.
Although the combination with the Bore up achieved a considerable increase in power, the fuel consumption was much worse than with the Normal throttle body + Normal air cleaner box, dropping to about 20km/Liter.
The price is cheap, so you can try it out for now and come up with a variety of settings. View detail

KOSO

26 Jun 2020

Racing Element

Fits: YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X, YAMAHA CYGNUS X

Japanese Webike user

3/5

I'm generally satisfied

I installed them on my CYGNUS 3. The OEM was getting dirty, so I figured I'd replace them with this one that was in stock Choice
Sponge comes with a thin and Sugar Crystal, this time with Sugar I used Crystal, which can be used twice if you change the Sponge, and can be reused if you wash it So yes, I think Cost performance is pretty high
To be honest, I don't know about the performance It seems to be able to be installed without the outer cover, but I'm riding with the cover because it's a commuter car
Top speed and acceleration aren't better, but they aren't worse either, no change View detail