Christian Horner remains confident Honda is the right move for Red Bull.
The Red Bull boss said that at Silverstone recently, the team was reassured that deciding to split with Renault is right.
And he says that moving to full works Honda power for 2019 is not too big a risk for the top Formula 1 team.
"The situation is roughly similar between the two engines, but there is more room for development potential.
Renault had a very difficult weekend at Silverstone. Our deficit was blatant, both in attack and defence," he told France's Auto Hebdo.
"There is a gap to be filled and we have great confidence in Honda, especially given what they have in the pipeline.
There is no guarantee, but the progress we have seen encourages us to believe that, little by little, we will get there," he added.
