*It requires to replace the carburetor in case it upgraded to Super Head + R. *Please do not re-use the cylinder in case the mileage of the big vehicle and cylinder are damaged.
•Details It is a version upgrade kit for Super Head + R specification if it is equipped with SP TAKEGAWA S stage Bore Up Kit. It is possible to have the Super Head + R at reasonable price, in order to use the mounted cylinder as it is. By setting it to the Super Head + R specification, it exhibits completely different output characteristics and high power from the S stage. The Included Camshaft is S-15.
•Super Head +R Details Super Head + R adopts the high-caliber valve of the SOHC class and the appropriate valve sandwiching angle to achieve stable output characteristics at high output characteristics and higher rotation range. Valve Diameter Intake valve Diameter: 28.5mm Exhaust Valve Diameter: 23.5mm Valve Stem shaft diameter IN/EX with 4.5mm
Valve features for Super Head + R is designed to reduce weight by increasing the diameter of valve stem shafts and by adopting waist processing.
Valve Spring: It adopted double spring of inner spring and outer spring (unequal Pitch) Steel Valve Spring Retainer
Port shape: The port diameter is suitable for the SP TAKEGAWA 3-D shape manifold, and the optimum port diameter is adopted. In addition, by attaching the three-dimensional shape manifold at the same time, it is possible to achieve a smooth inhalation effect without resistance from the carburetor to the combustion chamber, and the performance of the cylinder head can be maximized. Intake Port Diameter: 26mm/Exhaust Port diameter: 23mm
New Organization adopts a roller locker arm (Aluminum forged locker arm with built-in roller bearings) It adopts a roller locker arm to maximize the output performance of Super Head + R, it is possible to maintain output in the high-RPM range which is also a feature of the output up and roller locker arm of medium-speed range. The roller locker arm reduces the frictional resistance of the camshaft that occurs in the Slipper locker arm (OEM part type), and the roller bearing with built-in locker arm smoothly follows the camshaft profile from low rotation to high rotation.
It is a hollow camshaft with oil jet It has an oil line at the center of the camshaft and guides the oil to the camshaft sprocket.This increases the durability and lubrication effect of the camshaft chain. It also makes it possible to effectively cool and lubricate by providing an oil jet passage on the camshaft surface and spraying oil from the camshaft surface against the locker arm. It is a camshaft journal portion adopts both ends ball bearing support, to reduce the friction resistance to the camshaft from the start-up and low speed. There are two types of camshaft S-15/S-25, and you can enjoy the running performance by exchanging it according to the use application. The STD camshaft is S-15 camshaft.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
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