Russian pancakes

Today a well known Kazakhstani biker-traveler Dmitry Petruhin will tell about his travels and adventures on the road, as well as will share a recipe of his favorite Russian pancakes.
Egg – 1
Flour – 300-400 g.
Kefir – 500 ml.
Sugar – 3-4 table spoons
Salt to taste
Oil for frying – 500 ml.