First steps

If you don't have enough experience about 2 stroke engines then you should give up at the beginning.

There is more than one type of pocket bikes, but main difference between them is cooling system. Air cooling system and water cooling system.

Air cooled engine

Water cooled engine

Air cooled engine and water coled have same cylinder capacity: 30 ccm, 40 ccm, 49ccm and 60 ccm.