FP-0018 Big Valve Cylinder Head kit for CT125(JA55) and other old horizontal engines

Big valve cylinder head kit for CT125 (JA55) and other old horizontal engines. Big valve cylinder head for Honda old horizontal engines. Intake 28Φ, exhaust 24Φ. This product cannot be installed on genuine cylinders. Fits cylinders with inner diameter of 56Φ or more.
The big valves dramatically improve the efficiency of intake and exhaust. In addition, the ports have been enlarged, resulting in a pleasant engine feeling.
We recommend installing this product together with the bore-up kit. This product comes with a high cam and reinforced valve springs. After installing this product, there were no problems for over 10,000 km even under harsh operating conditions. This is a product that we can confidently recommend.
The product is only what is shown in the photo. Gasket is not included.