Developing physical competence and gaining acceptance are primary reasons for youth sport participation (Weiss & Ferrer-Caja, in press). To more effectively promote positive youth sport experiences, the personal meaning young athletes give to physical competence and social belonging (i.e., motivational orientations), and the self-perceptions they have regarding ability and belonging need to be considered (see, Allen 2001a; Maehr & Nicholls, 1980; Nicholls, 1989). The interaction between motivational orientations such as physical-related (task and ego) and social-related (affiliation and validation) orientations and self-perceptions are thought to explain why some individuals are more effortful and satisfied than others. The majority of research involving motivational orientations has focused on physical-related orientations (see Duda & Hall, 2001), while little has considered the relationship between social-related orientations and motivated-related outcomes (Allen, 2001a), or the moderating role of self-perceptions in the relationship between orientations and motivated-related outcomes (Cury et al., 1997; Sarrazin et al., 1999; Williams & Gill, 1995). The purpose of this study was to examine the 1) relationships among motivational orientations (physical and social), perceived effort, and sources of satisfaction and 2) moderating role of self-perceptions between motivational orientations and (a) perceived effort and (b) sources of satisfaction. High school team sport athletes (M=16.48 yrs; SD=1.17) completed sport-specific measures assessing motivational orientations (TEOSQ; Duda & Nicholls, 1992; Social Motivational Orientations Scale for Sport, Allen, 2001b), perceived competence (PSPP; Harter, 1985), perceived belonging (modified Psychological Sense of School Membership; Goodenow, 1993), perceived motivated behavior (modified Perceived Effort Questionnaire; Williams & Gill, 1995), and sources of satisfaction (modified from Lochbaum & Roberts,1993). The results of a multivariate multiple regression analysis (R_c²=.49, Wilks’ L=.24, F_{(24, 765.21})=15.92, p<.05) indicated that athletes higher in social and task orientations feel more satisfied when they interact with others, receive recognition, and attain personal standards than those lower in social and task orientations. Additionally, athletes higher in task and social affiliation and lower in ego and social validation orientation perceive themselves as more effortful, feel more satisfied when they attain personal standards, and are less satisfied when they out-perform others than athletes lower in task and social affiliation and higher ego and social validation orientations (R_c²=.34, Wilks’ L=.48, F_{(15, 607.72)}=12.27, p<.05). Contrary to predictions, the results of the hierarchical multiple regressions failed to support the moderating role of self-perceptions. The findings indicate that knowledge of the personal meaning athletes hold for competence and belonging can provide a greater understanding of their sport experience.