S-Stage α Bore Up Kit 181cc Monkey 125

【SP武川 01-05-0616 S-Stage α Bore Up Kit 181cc Monkey 125 Engine Parts Takegawa】
■Product Description
The S-Stage α Bore Up Kit includes the S-Stage N-20 Bore Up Kit, FI-CON TYPE-e (injection controller), a large-capacity injector, and a spark plug.
This product uses the stock throttle body.

■Detailed Description
●S-Stage Bore Up Kit 181cc
This bore-up kit changes the displacement from the stock 124cc to 181cc by changing the cylinder and piston.
By installing it simultaneously with the FI-CON TYPE-e (injection controller), it achieves powerful output characteristics unlike the stock engine.
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 the oil cooler.
An M5 temperature sensor can be installed at the oil plug bolt.
By using SP Takegawa's Compact LED Thermometer with M5 temperature sensor set, you can measure the cylinder temperature.
Bore diameter: 63mm. Stroke: 57.9mm (stock).
The piston is standard for high-octane gasoline specifications.
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.
When installed on a stock engine, the output in the high-revolution range is improved.
Regarding the Sports Camshaft (N-20), if you remove the decompression parts from the stock camshaft and assemble them to the sports camshaft, it becomes an auto-decompression specification.
●FI-CON TYPE-e (Injection Controller)
Since installing a sports camshaft or muffler parts can significantly deviate from the ideal air-fuel ratio, it is necessary to correct the fuel injection time with the FI-CON.
It can be installed simply by unplugging and connecting to the coupler of the genuine ECU.
The FI-CON TYPE-e has multiple data sets pre-configured 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 suitable for a wide range of vehicles from stock displacement to bore-up vehicles.
It is equipped with monitoring functions for engine speed, engine temperature, throttle opening, and injector opening/closing rate using a PC or smartphone, which is very convenient for setting adjustments.

■Compatible Models
HONDA
Monkey 125 (JB02-1000001~)
Monkey 125 (Thai model/MLHJB02)

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