1982-1983 Official Honda ATC 200E Big Red Shop Manual, Page 58Get this manual
CYLINDER HEADVALVES IN DEX MARK Remove the tim ing mark hole cap Turn the crankshaft with the recoil starter until the cam sprocketmark and cylinder head index mark align Remove the cam sprocket bolts and cam sprocket
ATC200E
CAM SHAFT Remove the camshaft Suspend the ca chain with piece of wire to prevent it from fall ing into th crankcase