Superhead 4V+R Combo Kit 88cc for Monkey and Gorilla

【SP Takegawa 01-05-8835 Superhead 4V+R Combo Kit 88cc for Monkey Gorilla Big Bore Engine Parts Takegawa】
■Product Description
This is a kit featuring the Superhead 4V+R cylinder head.
It's a great value set that includes the Superhead 4V+R kit, MIKUNI VM26 carburetor, high-flow filter, high-throttle set, and spark plug.
Bore diameter 57mm. Stroke volume 41.4mm (using normal crankshaft). Compression ratio 12.4:1.
Included camshaft: 10/15D

■Detailed Description
●Features of Superhead 4V+R (1-cam 4-valve)
Compared to the large-diameter 2-valve of SP Takegawa's Superhead+R, by having two intake valves and two exhaust valves, the valve curtain area can be further expanded, making it possible to achieve even higher intake and exhaust efficiency than with large-diameter 2-valves.
Furthermore, the cylinder head shape is designed to balance the center plug, valve included angle, combustion chamber shape, and port shape that accompany the 4-valve conversion, enabling higher output and achieving the sustained power characteristics at high RPMs, which is the Superhead's greatest feature.
By adopting a 1-cam 4-valve design, it was possible to achieve the lightest and most compact design possible, while simultaneously condensing the performance as the strongest SOHC head.
●New shape Superhead 4-valve + R body
The rounded cylinder head shape perfectly matches the Monkey style, enhancing the custom image of the vehicle.
In addition, the barrel-polished die-cast head covers beautifully enhance the cylinder head.
●Valve features
Valve diameter: Intake: 21.5mm x 2 / Exhaust: 18.5mm x 2
Valve stem shaft diameter: 4.0mm for both intake and exhaust.
●Valve springs
Uneven pitch is adopted to prevent surging at high RPMs.
●IN/EX port features
The port diameter is optimized to match SP Takegawa's 3D manifold.
By installing it simultaneously with the 3D manifold, it allows for smooth and unrestricted intake efficiency from the carburetor to the combustion chamber, maximizing the performance of the cylinder head.
●Adoption of roller rocker arms
The adoption of roller rocker arms maximizes the output performance of the Superhead+R, increasing output in the mid-to-high speed range and maintaining output in the high-RPM range, which is a characteristic of roller rocker arms.
Roller rocker arms reduce friction resistance with the camshaft that occurs with slipper-type rocker arms (genuine part type), and the roller bearings built into the rocker arms allow for smooth tracking of the cam profile from low to high RPMs.
●M8 Spark Plug
An M8 spark plug is adopted due to the optimal valve included angle from the 4-valve conversion and the compact head design.
●Hollow camshaft with oil jet (auto decompression)
An oil line is provided in the center of the camshaft to guide oil to the cam sprocket.
This improves the durability and lubrication effect of the cam chain.
In addition, an oil jet passage is provided on the cam surface of the camshaft, allowing oil to be sprayed from the cam surface to the rocker arm, effectively cooling and lubricating.
The camshaft journal section adopts ball bearing support at both ends, reducing friction resistance to the camshaft during starting and at low speeds.
Auto decompression function: Even with large displacement engine vehicles, the engine can be started with light kicking force.
Easy camshaft removal: The camshaft can be removed without removing the rocker arm.

■Compatible models
HONDA
12V Monkey Gorilla (Z50J-2000001~) (AB27-1000001~1899999)

■Notes
*The image is for illustration purposes only. It includes products with different sizes and colors.
*Product designs and specifications may change without notice. Please understand.
*This product is made to order, so cancellations after ordering are not possible.
*As this is a made-to-order product, it takes time for delivery. Also, the manufacturer may discontinue or change specifications without prior notice. Please be aware of this beforehand.