Cool, thanks SOCAL. All of those parts are actually there. His Dad told me removed the "end cap" I was afraid the spark arrestor was sandwiched between this supposed end cap and the main part of the pipe. So, is the spark arrestor integrated down inside the pipe somewhere? I want to get the kid out on the trails, but want to be legal too. Thanks for the help BTW, I did browse every pic on bikepics.com as well as the microfishe before I posted the question.