Superhead 4v+r(1凸輪4氣門)
與竹川Superhead+r的大直徑2氣門相比,由於有2個進氣門和2個排氣門各1個,進一步擴大了氣門幕面積,因此可以實現比大直徑2氣門更高的進排氣效率。這使得系統的水平得以提高。同時,在車頭形狀的設計上,對中心塞、氣門夾角、燃燒室形狀和端口形狀進行了平衡,以實現高輸出,並在高轉速范圍內實現可持續的輸出特性,這也是Superhead的最大特點。
由於采用了單凸輪軸和4氣門,因此可以實現最輕的重量和最緊湊的結構,同時也濃縮了最強大的sohc頭的性能。
全新超級頭4氣門+r氣門體
圓形缸蓋造型很符合猴子的風格,可以提升車輛的定制形象。
另外,每個缸蓋都采用壓鑄、桶狀拋光的材料,使缸蓋看起來很美觀。
氣門特性
氣門直徑
進氣:21.5mm x 2 /排氣:18.5mm x 2
氣門桿軸直徑:進排氣均為4.0mm
氣門彈簧
具有不等距、高轉速的特點。最後防止了手術的發生。
in/ex口的特點
口的直徑是優化的sp竹川的三維歧管。同時,通過與3D歧管的安裝,可以實現從化油器到燃燒室的順暢進氣效果,發揮出缸蓋的最大性能。
采用滾輪搖臂
通過滾輪搖臂,最大限度地提高了 "Superhead+r "的輸出性能,在中高速范圍內提高輸出,在高轉速范圍內保持輸出,這是滾輪搖臂的特點。滾子搖臂減少了與滑塊式搖臂(工廠零件式)凸輪軸的摩擦阻力,搖臂內的滾子軸承使凸輪外形從低轉到高轉都能平穩跟隨。
m8火花塞
四氣門設計可實現最佳的氣門夾角和更緊湊的頭部。
空心凸輪軸(自動減壓機構)
凸輪軸兩端由滾珠軸承支撐,以減小凸輪軸軸頸的摩擦阻力。除了自帶的凸輪軸外,還可以選配凸輪軸,用戶可以根據使用目的更換凸輪軸,享受車輛的性能。
適用凸輪軸:15/20d
自動減壓機構
減少啟動力和變速箱的負荷,即使是大排量發動機也能平穩啟動。
陶瓷Mexilinder/活塞
氣缸:孔徑54mm
活塞采用全鋁陶瓷Mexilinder,經久耐用,氣密性好,散熱性好。氣瓶標配了溫度傳感器,購買竹川溫度計或溫度計就可以測量氣瓶溫度。
124cc ha-cylinder:M5溫度傳感器
活塞
鑄造活塞帶鉬塗層活塞裙,可更好地與發動機初始接觸。
兩點式曲軸
特殊軸承,長行程曲軸(54mm行程)上的軸頸軸承孔徑較大,用於大功率發動機。
在曲軸應力集中的地方,軸頸的軸徑可以從20mm增加到22mm,提高了軸的強度
同時,曲軸進行了特殊的表面處理,進一步提高了耐久性。
行程容積為54mm。
■Features of Super Head 4V+R (1 Cam 4 Valve)
Compared to the SP Takegawa Super Head +R's large diameter 2 valves, the SP Takegawa Super Head +R has 2 intake valves and 2 exhaust valves, which increases the valve curtain area and improves the intake and exhaust efficiency more than the large diameter 2 valves.In addition, the head shape was designed to balance the center plug, valve pinching angle, combustion chamber shape, and port shape in order to achieve high power output and sustained output characteristics in the high RPM range, which is the biggest feature of the Super Head.
By adopting 1 cam and 4 valves, it was possible to make it as light and compact as possible, and at the same time, it condensed the performance as the strongest SOHC head.
New shape super head 4 valve + R body
The round shape of the cylinder head suits the Monkey style and enhances the custom image of the vehicle.
Each head cover is made of die-cast and barrel polished to give a beautiful appearance to the cylinder head.
Valve Features
Valve Stem Shaft Diameter: Intake and exhaust both 4.0mm
Valve Spring
The use of unequal pitch prevents surging at high RPM.
IN / EX Port Features
The port diameter is optimized for SP Takegawa's 3D shaped manifold.In addition, by installing it together with the 3-dimensionally shaped manifold, it enables a smooth intake effect from the carburetor to the combustion chamber without resistance, and the performance of the cylinder head can be maximized.
Adoption of roller rocker arm
By adopting the roller rocker arm, the output performance of the Super Head +R is maximized and the output in the mid to high speed range is increased and the output in the high rpm range is maintained, which is the characteristic of the roller rocker arm.The roller rocker arm reduces the frictional resistance with the camshaft that occurs with the slipper type rocker arm (stock part type), and the roller bearing in the rocker arm follows the cam profile smoothly from low to high RPM.
M8 Spark Plug
The M8 spark plug was adopted in conjunction with the optimum valve pinching angle and the compactness of the head due to the 4-valve system.
■Hollow camshaft (auto decompression mechanism)
The camshaft is supported by ball bearings at both ends to reduce frictional resistance in the camshaft journal.Optional camshafts are available in addition to the included camshafts, allowing you to change the camshafts to suit your application and enjoy the performance of your vehicle.
Included Camshaft: 15/20D
auto decompression mechanism
It reduces the kick-start force and the load on the transmission when starting the engine, and allows smooth engine starting even with large displacement engines.
■Ceramic plated cylinder / piston
HA Cylinder: Bore diameter 54mm
Adopts all-aluminum ceramic plated cylinder with excellent durability, airtightness and heat dissipation.The cylinder is equipped with a temperature sensor as standard.You can measure the cylinder temperature by purchasing SP Takegawa's thermometer built-in meter or thermometer.
For 124cc HA cylinder: M5 Temperature Sensor
Piston
The piston skirt is coated with molybdenum for better initial adhesion.
■Two-point support crankshaft
Special bearing with larger inner diameter of journal bearing for long stroke crankshaft (54mm stroke) is adopted for high power engine.
This allows the shaft diameter to be increased from 20mm to 22mm in the journal area where the stress of the crankshaft is concentrated
In addition, the crankshaft has been given a special surface treatment to further increase durability.