The first example of Moto3 race machinery will be officially presented during the build-up to June's Catalan Grand Prix.
Honda Racing, which has developed the new four-stroke NSF250R as the successor to the 125cc World Championship, will unveil the machine at the Barcelona circuit on June 2.
"This high-performance, lightweight and compact racing machine inherits important elements from the RS125R and will allow users to ride with the same sense of comfort while learning the basics to move up from entry level to the premier class, serving as a springboard in creating future MotoGP championship riders," a statement from HRC read.
Moto3's introduction will herald the end of 125s at world championship level. It was one of the original categories when grand prix racing began in 1949.