I bought this with a few other parts, namely the Takegawa Big Throttle Body and Fi-Con TYPE-e Injection controller.About quality and texture: The quality of the big bore high compression piston, cylnder block and camshaft is superb The piston is light weight, and there are groves for the valves on the top of the piston, which allows room for the valves during the exhaust and compression stroke.The cylnder block and sleeve is high quality, and so is the camshaft, which comes with a decompression mechanism with basically means everything is relatively easy to install.About the feeling of use: After installation and with the use of the Fi-con TYPE-e Injection controller, I could change the mapping of the ecu which then gave the engine a persceptable increase in power. The combination of the N-20 cam, big bore high compression piston and big throttle body results in a fast revving engine and perceptable increase in power and performance.Products to buy together: You need to install this big bore kit with the Fi-con TYPE-e Injection Controller made by Takegawa (which I had already installed before hand.) A big throttle body is recommended, but not compulsory. Difficulty of installation: As this invloved dismantling the top part of the engine, and I did not have the tools or skillset to do this, I got a trusted mechanic to do the installation for me. I suppose if you have the right tools and skillset, installation is possible for a experienced home mechanic.Cost performance and comparison with other products: It is difficult to compare with any other products because there aren't many other choices when it comes to big bore kits for the Kawasaki Z125 pro. At least not on Webike. Slightly expensive, yes. Nevertheless, the Takegawa kit is a satisfactory choice if you want performance, quality and ease of installation. About shipping and packaging: Shipping was fast. Packaging was, as usual from Webike and Takegawa, superb and secure.Any concerns, cautions, or advice when purchasing: The only main concern I had was related to the Fi-con Fuel Controller, which is important (and compulsory) when installing a big bore kit. Fortunately, the Fi-con Fuel Controller has an app specifically for the z125 and it is in English. Installing an oil cooler is also advisable, to help keep the engine temps down, especially if you intend to ride on track.
View Detail336.45 USD (49,922 JPY)
Delivery Information
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Product detail
Compression ratio: 138cc 12.3: 1
Bore Diameter: 138cc 59mm
Stroke: 50.6mm (Stock)
N-20 camshaft included
**When S-stage Big Bore Kit is installed, FI-CON TYPE-e (Injection Controller) must be installed at the same time.
*When using FI-CON TYPE-e, a computer or smartphone that meets the specified usage conditions is required.You will also need to be connected to the Internet to download software and applications.
*Depending on the lot, the product may be delivered with the old price and label with the old JAN code before the price change..
It is a big bore kit that can change the displacement to 138cc by changing the cylinder and the piston.
You can enjoy the full torque performance that the stock engine does not have.
■All aluminum ceramic plated cylinders
The cylinder is an all aluminum ceramic cylinder with excellent durability, airtightness and heat dissipation.
The piston skirt of the cast aluminum piston is coated with molybdenum for better initial adhesion.
■The cylinder can be equipped with a stick temperature sensor.
You can measure the cylinder temperature by purchasing SP Takegawa's compact LCD thermometer with stick temperature sensor.
■N-20 camshaft included
This is the best profile to maximize the performance of the stock cylinder head and improve the output performance.
Auto decompression mechanism is built in like stock.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.