swing arm

[robinson446]

hey just put an aftermarket swing arm on my quad, and there is a gap on both sides of mounts inside ,where bolt goes though motor , and bearing cap from swing arm is , now my question , when my son rides ,the bearing cap works its way out ,then i tap it back in , now i just put a clamp in around pivot bolt so it wont come back out , am i missing something? i dont know what swing arm it is , but will soon , when guy calls me , thanks