rebuild

[tcthomp66]

For a variety of reasons (gas in the oil, bearing failures, vacuum leaks amongst others), I am going to take apart my engine. During the crankshaft replacement and inspection of the engine, I will be replacing ALL the seals/gaskets in the engine.

One of the issues I have recognized is that the former owner did not use a torque wrench on any part of the engine. (I have one torque wrench and am ordering another today.)

What are the most common errors that a newbie will make when disassembling and reassembling a GY6 49cc engine?