【KITACO】Rear Sprocket Review

Good quality rear sprocket from KITACO

This is a good quality rear sprocket from KITACO, it's made of steel so it's much more durable than the aluminium ones if a bit more heavy but on the plus side it is a lot less expensive also. This is 32 teeth, it's 2 less than the original 34 one so it's better for top speed. Another good quality product from KITACO as usual! View detail

Cheap but good product

I purchased it as a replacement for the original C125. Not only was there not much difference from the original price, but Kitako is a trustworthy brand, so I chose it without hesitation.
The product reviews were good, so I ordered it without even thinking about it. Now the C125 is for life. -------------------------------------------------- -------- I purchased it as a replacement for the original C125. Not only was there not much difference from the original price, but Kitako is a trustworthy brand, so I chose it without hesitation. The product reviews were good, so I ordered it without even thinking about it. Now the C125 is for life. Powered by Google Translator View detail

For the final taste after bore up.

I replaced the Sprocket (Front and Rear) while converting to 88cc this time.

Why change Sprocket?

If you Bore up like I did, you will get more Torque and output than 50 OEM.
Therefore, it is necessary to change the OEM Sprocket setting to release the Engine Power more efficiently. If the clothes are too tight, they will tear, right?


So how can we transmit Power efficiently?
GEAR ratio needs to be changed.
The GEAR ratio is the so-called secondary reduction ratio, which is calculated by “Rear Sprocket Ding Number ÷ Front Sprocket Ding Number ”.
In other words, “how many revolutions of the Front sprocket are required to make one revolution of the Rear Sprocket”.

What are the effects or changes that would occur if the Sprocket is changed or replaced?

[FrontSprocket]
● Increase = higher top speed, lower acceleration, lower rpm when cruising, better fuel economy.
● Reduce = no increase in top speed, better acceleration, higher rpm when cruising, and lower fuel economy.

Rear sprocket
Increasing the number of rpm = no increase in maximum speed, better acceleration, higher rpm when cruising, and lower fuel economy.
● Reduce = Increased maximum speed, reduced acceleration, lower rpm when cruising, and better fuel economy.
The effect is reversed for the front and rear Sprocket.
You can replace either the front or rear, but since 1T on the front is equivalent to 3T on the rear, you may be able to save money by replacing the front if you want to change to a larger size.

I use Rear for fine tuning. 。 When the rear is large, it may get caught on bumps,
If the Front is small, the Chain will cut down the Arm, and if it is large, it will hit the Case.
The Front side may be changed by one or two fingers. After that, adjustment is made on the Rear side.


I purchased the CUB for CUB PRESS, which seemed to be expected to be durable, and replaced it this time.

good point
CUB PRESS→ Newspaper delivery. Since it runs with a lot of newspapers loaded, a more durable Sprocket is used than NORMALCUB.
Durability is high.

○Compatibility with ordinary CUBs.

Chose 14 front and 40 rear for balance between acceleration and maximum speed. It is easy to ride.

The front was changed to OEM13→14, which made it easier to handle in first and second gear.

A bad point
○The price is higher than for a regular CUB.
I think it can't be helped because it is made to be durable.


Rotation of the Engine is transmitted from the Front Sprocket through the Chain to the Rear Sprocket to drive the rear wheels. In other words, the above is synonymous with “ How many revolutions of the Engine are required to make one revolution of the rear wheel? 。
In other words, changing the Sprocket's Ding number is a change in the ratio of the Engine's RPM to the RPM of the driven rear wheels. 。



The change of Sprocket is effective not only for bore up, but also for NORMAL vehicles with low speed gear with low torque, such as 1st and 2nd gear, to make it smoother. View detail

Once I want to try the standard.

[How is it used?
I purchased this product because the previousOwner was using something quite different from the standard.
How was your experience with it?
I think the quality is perfect for the price. View detail

Cheap and satisfying

I bought the NTB system last time and it is definitely lighter than the NTB system.
I was concerned about its strength, but so far it has been working fine. View detail