bikes are not designed to be ridden on the back wheel..
so if your front wheel goes skyward when you take off from the stop sign its not a huge problem....
HOWEVER.. if your doing it a lot or riding on the back wheel for a greater distance then the oil that normally lubricates the crank is all at the back of the engine (its normally at the bottom of the engine).. engine failure... big $ to fix..
But you go right ahead & do them wheelies....
natural selection is a great tool..(they weed themselves out of the gene pool)
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