How do I clean oil injection system Suzuki 140 2 stroke

[rustyriver]

I have a 1998 suzuki 140 2 stroke fuek injected. The buzzer goes of at high rpms only then goes off when I slow rpms. I am checking the oil system everybody says clean the screen. I found a plastic in line filter but I am not sure if it comes apart to clean it. I dont want to brake it. is there another filter somewhwere? I would like to try everything I can before I order parts. It takes me days to get parts I have to order them. What should I do?