Takegawa Sport camshaft for the CRF50 CRF70 XR50 CRF70 with stock cylinder heads. Dramatically increases midrange torque and overall horsepower on engines from 50cc through 106cc.This is the camshaft included with early version E-Stage, S-Stage, and R-Stage EM heads. Now discontinued and replaced with the Super Sport camshaft. Available at this low price until stock runs out.