I've been searching the forum and found a lot of great info. I was considering purchasing a kit on ebay that includes a powershot cover, diaphram,spring, screws and o-rings. Sounds like this may not be required... After jetting my bike it doesn't really have a bog. I was only going to buy the kit if it really had some great reviews... So - if I go with an OEM diaphram, what is the right one? 5JG-14940-18-00 Thanks!