Heres the stock clutch pulley, I am just amazed at the construction of it. It comes with steel shoes, a clutch post brace, big post and smaller shoe pads(idk if thats a good thing lol). Ive found that the honda hobbit doppler yellow springs with the steel pads are my favorite setup for takeoffs (stock spx shoes work great with standard 103 doppler pullies, thats what I tested them on.)
Here is the setup with normal 103 doppler shoes on, sorry I took off the stock ones to test on the other bike. As you can see on the brace, the fins that stick out are there as an emergency start function for the clutch bell to grab onto.
as you can see toward the middle of the bell, there is a little circular peg that you move in toward the inside of the bell so that the peg can contact the clutch brace blades turning the engine over, then retracting with rpm (hopefully) your doppler clutch dont have shit on the stock spx one!