"Honda are not going to sleep. I think the impressive thing about Honda is that I've never seen them with next year's bike on track so early. I mean they had it at Misano in mid-July," said the Aspar rider, referring to a debut test for Repsol Honda stars Marc Marquez and Dani Pedrosa.
"That's the earliest I can ever remember. So I think they are going to make some improvements and I'm sure they will have something good for next year."
While the Factory and Open divisions will disappear next season due to the new single ECU rules, Honda is again expected to field four 2016 'factory' bikes, with the remainder likely to be of 2015 spec.
"Even the team's that will run this year's bike [in 2016] - Honda will figure out what's missing and update it," Hayden declared.
The factory Honda riders hav e struggled to control rear-wheel slides under braking this year, highlighted by reigning double champion Marquez suffering three falls in the opening seven races.
The Spaniard has finished second-first-first-second since reverting to last year's chassis, but believes the root of the problem is the engine, which cannot be modified during the season due to development freeze rules.
Hayden is yet to confirm his plans for next year, with rumours linking the former world champion with a move to World Superbike.
