Can I replace a 240A battery with this (120A) and some capacitors? Bigger battery is too wide for my build.

https://i.redd.it/hcrbrflomhv41.jpg via /r/CafeRacers https://www.reddit.com/r/CafeRacers/comments/g9gob3/can_i_replace_a_240a_battery_with_this_120a_and/?utm_source=ifttt