Newly crowned Moto2 world champion Stefan Bradl will ride an 800cc Honda RC212V on Tuesday at Valencia.
The ride, which will be with the LCR Honda team, is "a gift from HRC for winning the Moto2 Championship".
HRC also planned to let title runner-up Marc Marquez ride an RC212V, but the Spaniard is unable to do so due to his injuries from Sepang.
Bradl (Kalex) and Marquez (Suter) were both linked to a 2012 MotoGP ride earlier in the year, but now plan to stay in Moto2 next season.
LCR Honda, which has parted ways with Toni Elias after a difficult season, says it will make a decision on its 2012 RC213V (1000cc) MotoGP rider "in a few days".