I thought the slow was a bit large. But, I have noticed the stock carb says it has a #40. I wounder why that is. I so happen to have a #20 I'll give it a shot if I can find it lol.
There is no black plug, I'm no longer using the stock carb. The carb I installed can be tampered/adjusted easily. How do you even adjust fuel/air without burning the crap out of yourself anyway?
As for the shock I literally see absolutely no adjustments. Maybe it's different design? It's a 2016 but, the only difference I found from 2015 is mine has black rims and 2015 are chrome.