The pipe hanger is next. Install the mount first and use red thread lock. Insert the rod and measure out the length you need. Here we can see it's too long, and will need to be cut. A good source for extra rods are bike spokes. There are good quality material and will have flex. At about a buck for a piece you can't lose.

After cutting the rod to length, tighten grub screws on mount and pipe. Use red thread lock again. I added a piece of aluminum tape on the tank to hopefully help deflect some heat away.

Lastly attach the spring from header to engine. Some engines will have built in ears like the case here. It use two short springs to attach from header to engine. IMO it's a much better system. Most RTR/cheaper engines will have one long spring to go from one side of the header to the other by wrapping around the engine.