Tyre sizes for Cali 2?

Hi, This is my first post so apologies if this is not the right section or I have missed a previous post. Anyway, I would like to know what size tyres should be on a 1984 Cali 2, the original hand book says “120/90 H 18” for both front and rear but I have been told that the front should have a 110/90 H 18, (which is the tyre on the bike at the moment albeit a bit old and cracked), which is right?. Any info much appreciated.

all my bikes have 110 on the front

thanks for that, may go the 110 route, there is not much space for a larger tyre on the front anyway.

handles better with the 110 as well