S-Stage α Bore Up Kit 181cc CT125 Hunter Cub

【SP Takegawa 01-05-0635 S-Stage α Bore Up Kit 181cc CT125 Hunter Cub Engine Parts Takegawa】
■Product Description
The S-Stage α Bore Up Kit includes the S-Stage Bore Up Kit, FI Con TYPE-e (injection controller), and spark plug.

■Detailed Description
●S-Stage Bore Up Kit 181cc
This bore-up kit allows you to change the displacement from the normal 124cc to 181cc by replacing the cylinder and piston.
By installing it simultaneously with the FI Con TYPE-e (injection controller), you can achieve a torqueful output characteristic different from the stock one.
The cylinder uses an all-aluminum ceramic-plated cylinder with excellent durability, airtightness, and heat dissipation.
The cylinder is equipped with an oil outlet boss for an oil cooler.
An M5 temperature sensor can be attached to the oil plug bolt part.
By using SP Takegawa's compact LED thermometer set with an M5 temperature sensor, you can measure the cylinder temperature.
Bore diameter 63mm. Stroke 57.9mm (stock).
The piston is standard for high-octane gasoline.
Compression ratio Standard piston 11.0:1.
●Sports Camshaft (N-20)
The optimal profile maximizes the performance of the stock cylinder head, improving output performance.
Installing it on a stock engine improves output in the high RPM range.
For the Sports Camshaft (N-20), removing the decompression parts from the stock camshaft and installing them on the Sports Camshaft will result in an auto decompression specification.
●FI Con TYPE-e (Injection Controller)
Installing a sports camshaft or muffler parts can cause the air-fuel ratio to deviate significantly from the ideal, so it is necessary to correct the fuel injection time with the FI Con.
The FI Con TYPE-e has multiple data sets pre-set by SP Takegawa to match SP Takegawa engine parts, so you can easily select, change, and modify setting data using a PC or smartphone according to your engine specifications.
The injection time adjustment can be increased by a maximum of 5000μs and decreased by a maximum of 7500μs, making it widely applicable from stock displacement to bore-up vehicles.
It is equipped with a monitoring function for engine RPM, engine temperature, throttle opening, and injector opening/closing rate using a PC or smartphone, which is very convenient for setting.
It can be used with all SP Takegawa products (for CT125) from stock displacement to bore-up kits.
●Can be installed with a coupler-on to the genuine ECU
Since the controller wiring uses a coupler compatible with the genuine ECU, no wiring processing is required, and it can be installed by simply connecting the coupler to the genuine ECU.

■Compatible Models
HONDA
CT125 (JA55-1000001～)

■Notes
*The image is for illustrative purposes only. It includes products with different sizes and colors.
*Product designs and specifications are subject to change without notice. Please be aware of this.
*Due to the significant increase in engine output and torque with the installation of SP Takegawa's S-Stage bore-up kit, the crankshaft experiences increased stress such as twisting and deflection. SP Takegawa recommends installing a crankshaft support adapter simultaneously to reduce the load on the crankshaft.
The crankshaft support adapter adds ball bearing support to the end of the crankshaft flywheel side, suppressing twisting and deflection, and increasing the durability of the crankshaft.
*This product is made to order, so cancellations after ordering are not possible.
*As this product is made to order, it may take some time to deliver. Also, without prior notice, the manufacturer may discontinue the product or change specifications. Please understand this in advance.