Reliable and cost-effective High Camshaft for true performance

■First Things First
Our grom is aiming for a spec. with some durability and reliability that can easily go touring.
Therefore, our Tuning policy is to provide some Power, but to make it easy to ride and without anxiety.
Please note that we are not aiming for a peppy Setting that squeezes out Power at high RPMs, and our impressions are based on that assumption.

■Spec. of vehicle to be installed
JC75 Grom. It has been custom made with exhaust + Sub computer.
The intake is processed by OEMAir cleanerBox as follows
Exhaust Duct Removal
Inner ductPipe removal
KOSOFilter conversion

The exhaust is JMCA's BEAMS R-EVOExhaust System, but the Baffle was removed because the high RPMs are not pleasant.
Sub computer is installed with KITACO i-map (for JC61).


■External box/Quality
It arrived in a Craft-type paper box. In the past, paper boxes were of a type that allowed the contents to be seen, but this may be a cost reduction. Either type is fine.
There is no Cushion material inside, and the cam is still intact. 2 A4 sided Instruction Manuals were included.
Bearing rotational resistance is better than OEM and there is no BALI or anything like that. It seems to work without any problem.


Instruction Manual
In addition to the overall installation capacity, he wrote in detail. This made it possible for even a novice like me who had never opened an Engine to work on it without any worries.


■ Actual work
In addition to the Instruction Manual, we worked with information from blogs that provide detailed explanations on the Internet.
Particularly difficult parts were the upper dead center alignment and the removal and attachment of the camshaft chain.

Upper dead point alignment
While looking through the window, adjust to the upper dead point (T point) printed on the Flywheel side, but if you are doing Side Stand work first, you will be in a very Large strange position as you are looking through the window from below. In my case, I had a helper to help me, but you should use MaintenanceSTAND or call a helper.
Also, I heard that there are two types of Flywheel, F-point and T-point, and when I align the Camshaft Sprocket horizontally and look into the window, for some reason, every time "F" The letters of the word "F" were in the following table. Slowly observing, I realized that T and F are adjacent to each other, so I needed to stop at a nice T.

Camshaft Chain removal
First of all, it looks quite Large strange if the Bolt gets inside when removing the Rocker Arm Shaft SetPlate. My finger slipped and I dropped it, but I managed to remove it with Tweezers.
Then, after replacing the Cam, it takes a lot of hang to put the Chain into the Sprocket.
It's kind of like, first you put the bottom part on, then you switch hands and pull the upper part of the Chain upward with your fingers to chip it.
Also, the angle of the Cam has changed from before the removal, so it was easier to install by sticking a Driver or something into the hole in the Cam and turning it slightly Left to level it.


■ Post-installation work
After turning the Crank by hand several times and confirming that there was no abnormal noise, I ECUReset and started the Engine.
At first there is a sound like the genus Gold, partly due to low oil pressure, but it disappeared after 3 minutes of Idling.
Since Valve clearance is the same product as OEM, I did not adjust it myself this time, but reserved it at a nearby Motorcycle shop. I will leave the work in this area to PRO.


■Effects
After about 100 km of break-in, I ran the car at full throttle.
In the physical sense, the power characteristics are almost the same as the power graph described in this product.
Compared to the OEMCam, the Torque drops just a little bit at 3000-4000 rpm.
The Torque is felt to rise at once from around 6000 rpm, and to continue from there until 8000 or so.
It seems to me that a better exhaust system would clearly produce power at higher RPMs and be closer to Mukawa's nominal power graph.

General Comment
Supply and Exhaust + Sub computer + Cam Quantities:1 Set of 4-items when combined
It is a good product to enjoy the change, as the Power output is clearly different from OEM.
Originally, it probably should have been KITACO's Cam to match the i-map, but I wanted characteristics between KITACO's Type 1 and Type 2, so I dared to choose Mukawa.
There is no more panting from the Exhaust System or Air Cleaner, and the fuel mixture seems to be correct.
There is no decompression, but normal piston is totally normal, so if you don't have high-compression, I don't think it will be a problem.

If you ask a store to do it, it may cost about 20,000 yen for labor, but if you have a Torque wrench and special tools, it is 0 yen if you do it yourself. If you have already changed the air supply and exhaust and installed a sub computer, it is a very cost-effective product as a one-more. View detail

N-15Sports Camshaft

I installed it on my MONKEY125 and it blows up to 7,000 RPMs and is very easy to use at medium and high speeds.
However, the low-speed power seems to be lower than OEM, but I didn't mind that much. View detail

Elimination of 4-speed headway

Purchased with Mukawa Sub computereType.

The Engine becomes BALIBALI at speeds easily above 8500 rpm.

It changes from the Engine sound.

The 4th gear throttle has more room and can still be turned.
Grow! View detail