Jessopp suffered a broken collarbone in the spill, while Manx star Cummins picked up a wrist injury that ruled him out of the Isle of Man TT.
“To be honest I am coming back to try to right some of the wrongs of the past that I've experienced at the North West,” he said.
“I always qualify well but then it goes wrong on race day.
“The big bike races are the ones I want to win, they are the ones with the best boys in them. I will be concentrating all my efforts on them and using the Superstock bike to get some extra track time.”
Event Director Mervyn Whyte, said he felt Jessopp will be on the rostrum this year with better luck on his side.
"I watched Martin finish runner-up to Michael Rutter in Macau last November," Whyte said.
"I am sure that if he has a better run of luck than he has experienced in the past he will get his first North West podium in May."