Compatible models Monkey/Gorilla: FNO, Z50J-2000001~, FNO, AB27-1000001~1899999 | Monkey Baja: All models | XR50R/CRF50F: AE03 all models | :95cc | Bore diameter: φ54 | Stroke: 41.4mm (normal stroke) | Compression ratio: 12.0:1 Piston: Cast Valve installed

We developed a new HEAD (SE-PRO) based on the technical data cultivated with ULTRA-SE. We have adopted a big valve with an in diameter of 29 mm and an out diameter of 24.5 mm, which is the largest horizontal SOHC. New skills and specifications such as φ54, D-type exhaust port, L-type piston ring, and cam with decompression. Please come and experience it for yourself. *A reinforced crankshaft is required separately for installation. A stock crankshaft lacks durability and may be damaged. [SE-PRO's evolved cylinder head] The intake port has a high port layout and a port shape that increases intake efficiency. Exhaust Port (D-type) A D-type port is used to increase the flow velocity, reduce exhaust return, and improve exhaust efficiency. The combustion chamber has been optimized by increasing the diameter of the combustion chamber valve to φ52. Newly adopted W fillet for intake and exhaust ports. Fins are placed before and after the valve stem to adjust airflow, reducing turbulence that occurs around the valve. [Evolution of SE-PRO Piston Ring] ■SE-PRO L-shaped piston ring The top ring is a unique L-shaped ring. Even though the ring thickness has been increased (maximum 1.2mm thickness), the cylinder contact surface is rounded, so the contact surface is the same as the conventional one (0.8mm thickness). In addition, by lowering the tension and reducing the coefficient of friction, we purposely utilize the "deflection" to achieve a highly confidential shielding effect. Reduces blow-by gas and reliably transmits explosive expansion energy to the piston. ■SE-PRO oil ring Adopts a newly designed K type expander. By creating a gap between the contact surface of the expander and the side rail, the movement of the piston causes the side rail to flex and actively scrape up and scrape out the oil. [SE-PRO's evolution plated cylinder] As before, the cylinder eliminates the liner and uses a lightweight all-aluminum cylinder with special hard plating applied to the cylinder inner wall, which dramatically improves wear resistance and heat dissipation. Masu. The 124cc cylinder uses the conventional cylinder as is, but the 95cc and 117cc cylinders (inner diameter: φ54, cylinder length: 63.5mm size) use a newly set cylinder with the same specifications as the 124cc cylinder. Masu. [Evolution of SE-PRO Intake and Exhaust Valve] ■SE-PRO Valve The valve diameter (face) has been increased to φ29 on the intake side and φ24.5 on the exhaust side. The stem diameter was reduced to φ5.5 for durability, and the neck was reduced to φ4.5 to reduce intake and exhaust resistance. [Evolution of SE-PRO High Comp Piston] ■SE-PRO Cast Piston High comp shape designed to improve combustion efficiency according to displacement. Furthermore, WPC+MoS2 processing is applied to improve strength and reduce sliding resistance. [Evolution of SE-PRO High cam] ■High camshaft with decompressor Increases valve lift and improves output. The surface is nitrocarburized to reduce sliding resistance, metal fatigue, and improve initial fit. With the addition of a new decompression function, starting with a kick is now easier.


Manufacturer: KITACO
Brand: KITACO
Model name: 212-1123810
Product size: 24.79 x 20.5 x 14.1 cm; 3.26 kg
Item model number: ‎212-1123810
Item dimensions: Depth x Width x Height: ‎24.8 x 20.5 x 14.1 cm
Item weight: ‎3.26 Kilograms