i have a 94 tandem rangertrail i am working on fixing up. just put new bunks on. when i make a sharp turn i notice some poping or creeking noises, i think its from the leafs or the bushings. the previous owner told me he had put brass bushing in it. also when i was doing my bunks i noticed there where zirk fitting for the leaf bushings...do these need oil? is this normal for tandems?
thanks