S-Stage Bore Up Kit (81.2cc / without camshaft) Cub 50 (AA04)

The S-Stage Bore Up Kit allows you to increase your engine to 81cc by simply replacing the cylinder and piston, while retaining the stock cylinder head.
This kit does not include a camshaft.
By upgrading from the stock 50cc engine to 81cc and installing a Takegawa Sport Camshaft and FI CON2 (injection controller), you can improve power output and achieve a torqueful ride.
Furthermore, installing a Takegawa exhaust simultaneously will further enhance power output.
When assembling this product, you must install the separately sold Takegawa FI CON2 (injection controller) and perform fuel enrichment correction.
Using a bored-up engine without installing the FI CON may cause damage.
Also, do not combine it with products from other manufacturers.
FI CON2 (Injection Controller) Part Number: 05-04-0008
If you previously purchased the FI CON2 (injection controller) together with a Sport Camshaft, you can continue to use that FI CON2.
In that case, the built-in
Bore diameter: 48.5mm (stock 37.8mm) Compression ratio 11.3:1
Compatible models
: Super Cub 50 (FI) (AA04-1000001)
*Images are for illustration purposes only, and product designs and specifications shown may change without notice. Please be aware.