The Motorchuna (Russian: Моторчуна) is a river in Yakutia (Sakha Republic), Russia.

[2] In the International scale of river difficulty the Motorchuna is a Class II destination for rafting and kayaking.

In mid course it turns slightly and flows across the Central Yakutian Lowland in a roughly ESE direction forming meanders in the floodplain to the south of the Syungyude.

In its last stretch the Motorchuna flows parallel to the Muna further south, in an area of lakes and marshes.

The main fish species are pike, perch, lenok, taimen, grayling, burbot, whitefish and nelma, among others.