Does anyone know how to backfire on a clutch Yamaha LC 135 GP Edition? Theres no kill switch to work with, only a single button that starts up the bike(electric starter). I tried doing 30 and shutting the engine off while moving then rev the bike up before starting the engine up again but I dont see flames coming out or loud bangs

Does anyone know how to backfire without a kill switch pls? I wanna start scaring old ladies in KL