How much oil should you put into Honda motorcycle front forks?

This is different for different models of Hondas, depending on the size of the forks and the size of the fork springs, the kind of terrain and riding style the bike is designed for is also taken into account. The information can be found in the owner's manual for the bike. If you don't have the manual then there is a rule of thumb that can be used. Fill the forks up but leave 110 mm from the top. If you use more than this, then the suspension will be stiffer. If less is used, then the suspension will be softer and perhaps too soft. Many riders use 10 W oil.