The Gogo Falls are about 35 feet in height and fall into a deep pool. The Gogo continues through Gogo Glen and flows into the Clyde south of the pier, near to the Putting Green
There is a modern day photo of the Gogo Water flowing under a road bridge in Largs itself here
This is the Coalpit Burn which reaches the Clyde near to the Pencil Monument and which flows down from the Haylie Reservoir further inland. Two more photos of it below:
Noddsdale Water above, near to where it flows into Largs Bay, flows down from Outerwards Reservoir. Another branch of it a short distance inland is called the Noddsdale Burn. The name Noddle Burn is sometimes used too and I have also seen Noddsdale spelt Nodsdale!
There are also the Routenburn which flows into the Clyde slightly further north than the Noddsdale (unseen and under the road next to the Underbank flats), and the Kel Burn which is south of the Yacht Haven. There's a nice photo of the Kel Burn here.
A few of these water courses can be seen on this map of walks around Largs.