KOSO Motorcycle Engine Parts Reviews

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KOSO

08 Jan 2024

KOSO Round and Round Kick Pedal [CUB MONKEY Series]

Fits: HONDA monkey, HONDA gorilla (Gorilla spp., esp. western gorilla, Gorilla gorilla), HONDA cub, HONDA monkey, HONDA gorilla (Gorilla spp., esp. western gorilla, Gorilla gorilla), HONDA cub

Japanese Webike user

5/5

Pimp to LITTLE CUB (carburetor)

[How is it used?
Normal kick is dirty and needs to be replaced
Was the one you received as per Image?
Plating is thicker and looks better than the photo.
Was the installation difficult?
Just a normal exchange.
How was your experience with it?
I was worried about interference with the Exhaust System, but there is enough room for a Large
I'm using WirusWin's RODExhaust System, but NORMAL would work too.
[Included Parts:were they on?
Screw for fixing
[Was there anything that disappointed you?
I'm a little concerned about it hitting the Side coverretc. because it falls too far inward when it's tipped over.

I have no complaints about this level of quality for a few hundred yen more than the OEM compatible product. View detail

KOSO

14 Nov 2023

Big Intake Manifold

Fits: YAMAHA BW'S125, YAMAHA BW'S X, YAMAHA BW'S R, YAMAHA BW'S 125, YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA Cygnus X, YAMAHA Cygnus X

Japanese Webike user

5/5

It was almost almost Bolt On.

It is a convincing creation, as one would expect from KOSO.
The connection surface with the Cylinder is not distorted at all, and the Injector slot is also very precise, neither loose nor tight, just fit (although it takes a little bit of hang to insert it because it is too just fit).

The only thing that needed to be done was the processing of the OEMBracket shown in the photo, as per Title. Almost Almost." It was Bolt On. View detail

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

Super slim style meter Thermometer red display

KOSO Universal Choke Extension Kit for Big Carburetor Set UP kit

KOSO Super Slim Style Meter [Voltmeter / Red Display]

KOSO

10 Sep 2023

KOSO Super Slim Style Meter [Voltmeter / Red Display]

Japanese Webike user

5/5

I've got something. can be seen and understood

[How is it used?
Double-sided tape for Emon's exterior is attached to the back of the headlight (PROTEC LB7W-H LED Headlight Valve).
Wiring is taken from:Fuse power supply, as I recall.
Period:September 9, 2018 to September 10, 2023 to date.
Distance ： 68,197 - 26,169 = about 42,028 km

Was the one you received as per Image?
As per Image

Was the installation difficult?
The USB power supply was connected in the form of an addition to the place where the USB power supply had originally been added, so I think that there was little difficulty.

How was your experience with it?
*I do not have any equipment to measure voltage, so I have no idea about its accuracy.
Easy to see and read.
In the case of the last number 5, in particular, I remember that I felt a sense of discomfort even before the Engine completely stopped working. Especially in the case of the last number (5), I remember that I felt a sense of discomfort even before the Engine completely stopped operating, so I feel that if the values are not the usual ones, it will lead to early detection of abnormalities.
When connected to USB power supply
2. when using Grip heater
3. when cooling fan is in operation
4. When Cell Motor is in operation
5. when the Generator was completely black
The voltage of the battery is always in view, which is one of the reasons why we decided to replace the battery.
The engine is not benefited by the running wind, and the exhaust heat of the engine and the heat of the headlight are tormenting it, but I have not encountered any failure like failure yet.

[Included Parts:were they on?
I don't remember.

[Was there anything that disappointed you?
N/A

To be able to display information about electricity that is not visible to the eye, I've got something. I thought that Merit was a strong choice as a way to realize the "Merit". As a start to notice the "Merit", I thought Merit was strong because it is not expensive, and as the product name suggests, it is thin and compact, so it can be installed anywhere you want. 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