It is a development of the original XT series ('X' stands for 4 strokes, 'T' for TRAIL), a line of motorcycles inspired by those used on the Paris Dakar rally.

The XT660R is the standard Enduro model ('R' stands for racing).

A five-valve version of the 660 cc engine was used in a number of MZ (MuZ) motorcycles, including the MZ Skorpion, Baghira and Mastiff.

All versions utilize the same engine and share some chassis components.

This motorcycle, scooter or moped-related article is a stub.