■Details
The Hyper S-stage Big Bore Kit is a bargain kit that includes the e-stage big bore kit 181cc (with sports camshafts), FI CON2 (injection Controller) and spark plugs.
Recommended for those who are considering installing a big bore kit.
■S Stage Big Bore Kit 181cc
This is a big bore kit which can change the displacement from stock 124cc to 181cc by changing the cylinder and piston.
When installed together with FI CON2 (Injection Controller), it delivers a torquey output characteristic different from the stock one.
The cylinder is an all aluminum ceramic cylinder with excellent durability, airtightness and heat dissipation.
The surface of the cylinder is painted black like the stock.
The cylinder body is equipped with an oil outlet to the oil cooler.We recommend our oil cooler kit (sold separately).
The pistons included in the kit are the "standard" type for high-octane gasoline.
Cast pistons are used.
Compression ratio 11.0:1, bore diameter 63mm, stroke 57.9mm (stock)
■Sports Camshaft
This is the best profile to maximize the performance of the stock cylinder head and improve the output performance.
When the decompression parts are removed from the stock camshaft and assembled to the sports camshaft, it becomes an auto decompression mechanism.
■FI CON2 (Injection Controller)
This is our original injection controller, which can be easily changed by switching the rotary switch on the main unit, without the need for troublesome data input by PC.
Various 3D correction maps set up for our custom parts are built in and can be set up according to the vehicle's specifications.
In addition, the built-in correction map can be fine-tuned by using the rotary switch on the main unit.
The FI CON2 comes with a dedicated harness COMP. and can be installed with minimal wiring modifications.
Click here to purchase Yoshimura's GROM carburetion kit and FI controller.