S-Stage Bore Up Kit (88cc/H-Cylinder) for 12V Monkey (Regular Gasoline Compatible)

This light big bore kit is popular for street riding and can be easily assembled by yourself.
S-Stage allows you to increase displacement while keeping the stock cylinder head and crankshaft.
S-Stage eco
The conventional standard compression ratio was 11.5:1, which recommended high-octane gasoline. However, with S-Stage eco, the compression ratio has been reduced to 10.5:1, allowing the use of regular gasoline.
This helps to reduce fuel costs.
Cannot be installed on anything other than the stock head.
88cc Bore diameter 52mm Compression ratio 10.5:1
Cylinder: H cylinder
Included camshaft: Sports camshaft
Compatible models
: 12V Monkey/Gorilla (Z50J-2000001~ / AB27-1000001~1899999)
: Monkey BAJA (Z50J-1700001~)
*If installing a stock carburetor on a V cylinder, it will interfere with the cylinder, so you will need to grind the cylinder.
: CRF50F (AE03-1400001~)
: XR50R (AE03-1000001~)
: Magna 50 (AC13-1000010~)
: CD50 (CD50-1500001~)
: CL50 (CD50-4000001~)
: Benly50S (CD50-2200005~)
: 12V DAX50 (AB26-1000001~)
: JAZZ (AC09-1000030~)
: Super Cub 50 (C.D.I. ignition vehicles)
*However, excluding vehicles C50-8000026~8985028. *Excluding EFI models (C50-9000001~9499999/C50-0200001~0999999 C50-2100001~2299999/AA01-1000001~1699999)
: Little Cub *Excluding EFI models (C50-4300001~/AA01-3000001~3999999)
: Giorno Cub (AF53-1000001~)
*The images are for illustration purposes, and the design and specifications of the products shown are subject to change without notice. Please be aware of this.