download the manaul and follow it step by step, take pic's if it helps you to remeber where stuff goes. The 200's are one of the easy engine to rebuild. Make sure you buy a good gasket kit PLEASE do not use silicone when you put it back together (you will need it for the rocker cover tho) It may be a good idea to change out your valve seals (comes with most gasket kits). Have fun with it, make sure you clean the out side of the engine really good so no dirt or mud falls inside the cases, and make sure you have a nice clean place to take the engine apart and put it back together.
Thanks Aaron
HONDA WITH A WING AND A PRAYER
1984 110 project
1984 125 parts bike
1983 honda 200x
19 85x2honda 200x
1985 honda 250sx
1985 honda 250es
polaris p3 should be a parts bike ***gas tank wanted**