The skill that starts the combo is obtained at class rank 4 and needs more than 450 SP.
Using an attack skill at the right moment chains the skills in the quick slots; switching targets does not break the combo.
The combo is skill Combo Start; Board Chain Attack and Bike Chain Attack are the chain attacks on board and bike.
Combo Start cooldown: 8 s.
The combo does not work in battle mode.
Battle Mode 2 does not activate while the combo is active.
See also: In-game help: Combo · Combo
Data from the Cabal Latino server and client (EP33).