The 24-year-old has contributed to 20 City goals so far this season.
But Guardiola wants the England international to take his game to another level.
"I've looked at how Bournemouth play and it's similar to my style."
"Raheem's work ethic, his physicality is incredibly strong, he has this mentality to create chances and score goals and it's good for him," said Guardiola.
"He's scored more goals now than in our first season.
"He has to be more clinical and precise in the important games. We created a lot of chances (against Rotherham) but if we play against Liverpool or in the Champions League we create just two or three chances.
"We don't have more because the opponents are good, so in that moment we need him. We need him to be precise and to be there.
"I think he improved a lot and it's the same with Phil [Foden]. We cannot expect him to be precise and clear and make good decisions in every single action.
"When he is 26 or 27 he will be an incredible, much better player, give us more joy with the way he plays but he still has many things to improve."