The caution tag in the sierra carb kit states,"When changing the injector diaphram you MUST Change the injector Spring and Plug." This sounds like it pertains to a fuel pump kit. I have looked at the BRP parts brake down and there is nothing called an "injector diaphram" or "injector spring and plug" there is also no spring included with their kit. Am I missing something? There site also offers no instructions but they do have an email address for help.