Will a pro circuit t-4 exhaust fit on a 1974 honda z50 k5? I know it fits on the newer z50r's, but not sure if it will fit the older z50's. here's a link for the exact one. http://www.jcmotors.com/p-3821-pro-circuit-t-4-aluminum-system-for-honda-z50-79-99.aspx