Takegawa 178cc 4 Valve +R Superhead Kit is a specially designed kit to incorporate the most out of the KLX110 KSR110 4 valve Superhead and the venerable Keihin FCR 28mm downdraft carburetor. Specially designed intake port matched specifically for this carburetor, is a 3 dimensional oval intake masterpiece and only available in this specific kit. Entire kit consists of the all powerful +R 4 valve Superhead, 25/30D auto decomp camshaft, 178cc 67mm patented SCUT cylinder and piston, Keihin FCR28 horizontal mount downdraft carb intake adaptor, and all installation hardware. No case boring is required.