Manx rider has parted company from Jackson Racing and looks set to team up with Bruce Anstey in Clive Padgett's Honda team for the Supersport and Superstock races at the Isle of Man TT.
Cummins, who remains with Honda Racing alongside John McGuinness for the Superbike and Senior races, first rode for the Jackson Racing squad in 2014 and was entering his third season with the team
A statement said: “Jackson Racing would like to take this opportunity to wish Cummins all the best for the future in whatever direction he chooses to take.
“The team will remain with continued focus and drive on both John McGuinness and Steve Mercer ahead of the prestigious Isle Of Man TT road races.
“Twenty-three time TT winner and current lap record holder McGuinness will pilot Jackson Racing machinery in both Supersport events. For Steve Mercer however, this now represents a wider opportunity to compete across the classes in Superbike, Supersport and Superstock categories,” the statement added.
“Steve has been extremely positive towards the development of the team since his inception. He delivered a very impressive performance at the recent Castle Combe test and is keen to build upon this at the TT races in a few weeks' time.”