*If you install SCUT 178cc bore up kit, you cannot register as a Class 2 moped. *This product is for KSR110 only and cannot be installed on KLX110. *The kit is only available in SCUT178cc.Customers wishing to use the 124cc/138cc bore up kit need to select the head kit and cylinder kit and have the fins of the cylinders machined. *SP Takegawa downdraft carburetor kit must be installed at the same time. *To install the downdraft carburetor kit, remove the stock air cleaner box and install the SP Takegawa shroud bracket set (part no.You need to install 07-07-0019). *For vehicles equipped with SP Takekawa's oil cooler kit, a separate color set (part no.00-07-0078) can be purchased for installation.
Superhead 4V+R (downdraft specification) cylinder head is adopted. By installing the patented SCUT cylinder and piston, the displacement can be increased to 178cc. The four-valve design with two intake valves and two exhaust valves increases the valve curtain area and improves intake and exhaust efficiency. SP Takegawa's original cylinder head shape, which was designed to balance the appropriate valve pinching angle, combustion chamber shape, and port shape for the 4-valve configuration, enables high power output and sustained output characteristics at high rpm.The cylinder head is also equipped with aluminum roller rocker arms and auto decompression camshafts, which are well established in the Superhead+R series.
■4 Valves Intake Valve Diameter: 23mm x 2,Exhaust valve dia.19.5mm x 2
■Downdraft carburetor-specific cylinder head shape This is a special cylinder head with a modified shape to fit the FCR/TDMR downdraft carburetor, which boasts high-cycle fuel supply and excellent carburetor performance due to its higher power output.The new design not only includes a downdraft carburetor, but also an intake port with a 3-dimensional tapered intake adapter machined from aluminum that allows smooth intake from the carburetor bore to the intake valve without resistance.
■Adopted roller rocker arm Aluminum forged rocker arms with internal roller bearings.Compared to the conventional slipper type rocker arm, the slipper part is a bearing to reduce friction loss and smoothly follow the cam profile from low speed rotation to high speed rotation.The weight increase due to the use of roller bearings has been overcome by making the rocker arm body of forged aluminum.
■Valve Spring Features Unequal pitch (2-step pitch) is used to prevent surging at high RPM. Steel Valve Spring Retainer
■Hollow camshaft with oil jet (auto decompression) Included Camshaft: 25/30D An oil line is installed in the center of the camshaft to guide the oil to the cam sprocket.This increases the durability and lubrication of the cam chain.In addition, an oil jet passage is installed in the camshaft cam surface, and oil is sprayed from the cam surface to the rocker arm to effectively cool and lubricate.The camshaft journals are supported by ball bearings on both ends to reduce frictional resistance to the camshaft during starting and at low speeds. Auto decompression function The engine can be started with a light kick force even for vehicles with large displacement engines.Four types of camshafts are available and can be replaced according to the application.
■SCUT cylinder (patented structure) No need to disassemble the crankcase, you can increase the displacement to 178cc with the stock crankshaft.The cylinder is specially modified to accommodate downdraft carburetors.Adopts all-aluminum ceramic plated cylinder with excellent durability, airtightness and heat dissipation.A stick temperature sensor can be attached to the cylinder, and the cylinder temperature can be measured by purchasing a compact LCD thermometer manufactured by SP Takegawa.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
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