Are motorcycles set at a 14.7:1 air to fuel ratio stock?

Question

just wondering if motorcycles are set to maximize fuel economy stock?

if they aren't set to this, how can i set it to this?

Answer 1

NO! that figure is for optimum circumstances, some engines run better at different settings,under different conditions. unless you want to go a steady speed on a flat surface?There are a lot of variables in tuning an engine for a given task, ask 10 tuners and get 10 different answers.I left a link that explains it in simple terms,better then I ever could.but I would consult a good tuner who has a dynometer and knows how to use it. explain the type of riding you plan to do, and let them set it up.

Answer 2

14.7 is the ideal fuel ratio for water cooled engines, but not air cooled. Air cooled engines might need a ratio in the 13s. to keep them running cooler. A Dyno is the best  bet to obtain this.