Displacement: 120cc Attached Cam: SR-25 ■Port Diameter Intake: 29mm / Exhaust: D-type port ■Valve Diameter Intake: 28.5mm / Exhaust: 23.5mm ■Steel valve spring retainer ■Valve stem shaft: 4.5mm for both intake and exhaust ■Valve springs: Inner spring + outer spring: Double springs ■Adopted roller rocker arm
*When installing the racing 120cc / 130cc cylinders, modification of the crankcase is required. *Depending on the lot, the product may be delivered with the old price and label with the old JAN code before the price change.
■Features of Superhead +R Inherited from the "Super Head (Stage 3) " which enables high output with large diameter valves and smooth intake and exhaust ports, the "Super Head (Stage 3) " is equipped with proven roller rocker arms and a new oil line structure for even higher output and durability. It is a high performance cylinder head. The roller rocker arm of SP Takegawa's Super Head +R for Monkey engine is adopted for the vertical engine to maximize the output performance of Super Head and to maintain the output at mid to high speed range and at high rpm range which is the feature of roller rocker arm. The slipper type rocker arm (stock part) reduces the frictional resistance with the camshaft and the roller bearing in the rocker arm follows the cam profile smoothly from low to high rpm. The rocker arm body is made of forged aluminum to overcome the weight increase by using roller bearings. M8 spark plug adopted Since the wall pressure between the plug hole and the port is reduced due to the larger port diameter caused by the adoption of a large-diameter valve, an M8 spark plug is adopted to ensure sufficient wall pressure. This prevents the cylinder head from being damaged by thermal deformation, thus ensuring stable power output. Hollow camshaft with oil jet An oil line is installed in the center of the camshaft to guide the oil to the cam sprocket. As a result, oil is sprayed from the center of the cam sprocket by centrifugal force from the inside of the cam chain, increasing the durability and lubricating effect of the cam chain. In addition, an oil jet passage is provided on the camshaft cam surface, so that oil can be sprayed from the cam surface and cooling and lubrication can be performed effectively. The camshaft body is supported by ball bearings on both ends to reduce the frictional resistance that occurs in the oil journal (stock parts type). In addition, the weight of the camshaft body has been greatly reduced compared to the Super Head (Stage 3) camshaft by the use of oil passages. There are 3 types of camshafts with different profiles, SR-25 / SR-30 / SR-35, and they can be replaced according to the application. The camshaft included in the kit is recommended by SP Takegawa. Camshaft holder with oil lines By installing a new oil line structure in the camshaft holder, the oil line is connected to the oil line in the cylinder head to enable detailed oil lubrication. In addition, a passage for directing oil to the hollow camshaft with oil jet is provided to support lubrication of the camshaft and cam chain. Cylinder All aluminum ceramic cylinder with excellent durability, airtightness and heat dissipation is adopted for each displacement, and the oil outlet to the oil cooler and the stick temperature sensor attachment part made by SP Takegawa are equipped as standard. Cylinder temperature can be measured by installing SP Takegawa thermometer (with stick temperature sensor). 91cc (bore diameter 57mm): Cylinder fin shape is standard type 124cc (bore diameter 57mm): Cylinder fin shape is standard type SCUT125cc (Bore diameter 59.4mm) SCUT136cc (Bore diameter 62mm) SCUT146cc (Bore diameter 62mm): Cylinder fin shape is big fin type The Scat structure is a patented structure that allows a large increase in displacement without the need for crankcase disassembly and machining, and with a stock crankshaft.(Excluding 146cc) In addition, the scut cylinder is equipped with an oil jet mechanism, and just by installing it, it becomes an oil jet specification, and oil is directly injected from the cylinder sleeve to the inner wall of the cylinder, the back of the piston, and the small end of the connecting rod, so that lubrication and cooling inside the engine can be effectively performed. Racing 120cc / 130cc (bore diameter 58mm): Cylinder fin shape is big fin type The cylinder sleeve is made of thicker material for better durability in off-road driving and endurance racing. Various pistons The 124cc / 125cc / 136cc / 120cc / 130cc racing engines use cast aluminum pistons with a molybdenum coating on the piston skirt for better initial adhesion. The SCUT146cc uses forged aluminum pistons. Long stroke crankshaft (stroke amount: 48.5mm) High performance crankshaft designed for optimum crankshaft weight balance against stroke volume. The crankshaft and bearings are manufactured to a high degree of precision to achieve low vibration and greatly enhance the motion performance of the crankshaft. In addition, the flywheel part of the shuffler A special surface treatment has been applied to the top and bottom of the plate to improve fatigue strength and galling resistance. The SCUT 146cc uses a special 48.5mm long stroke crankshaft.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
This is the first Full kit above the waist, including the first Head replacement New ModelCUBetc. and the Roller rocker arm was the first time I was curious about it Large sheets were played and introduced Crankcase bowling was needed and I asked SP Takekawa to process it I wanted to use it legally, so here it is Accuracy was good, as usual for SP Takekawa The weight is finished as a total light because of the no-liner cylinder The appearance of the fins became large and respectable I can't turn it because I'm breaking it in, but it has more punch in its start than 115cc It is much higher than just Bore up in terms of Cost The oil temperature is also consistently low because of the Big fin cylinder Durability is still unknown, so I'm being spicyView Detail
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