Most studies undertaken on adolescents and youths engaging in illegal motorcycle street racing behaviour were primarily focused on the socio-demographics and characteristics of the illegal racers. Limitedstudies attempted to examine the relationship between the racers' demographic profiles and their 'intention' to engage in the actual behaviour of street racing from psychological perspectives. This study aimed to examine the relationship between the demographic profiles and the 'intention' of the illegal racers from the perspectives of cognitive development, emotions and psychobiological development via the Theory of Planned Behaviour (TPB). This study used abusive parenting and traumatic experience as antecedents to the TPB theoretical framework. These two antecedents were linked to the 'intention' of the illegal racers to engage in illegal motorcycle street racing's actual behaviour. Attitude, subjective norm and perceived behaviour control of the TPB related to the illegal racers' psychological perspectives were used to ascertain whether abusive parenting and traumatic experience significantly influenced the respondents' 'intention' to engage in illegal motorcycle street racing behaviour. 261 illegal motorcycle street racers in Wilayah Iskandar, Johor, took part in this study. Interestingly, the quantitative and qualitative results contradict the claims made by several psychologists.