A Honda shop wanted an outrageous $40 + tax for the tool. Here is my 1c solution.
The tool fits nicely between the bowls and works like a charm!
1. Split the old diskette case and remove innards
2. Measure precisely the float height you need (shown is 26 mm ) and mark with the X-acto knife
3. Cut out the height section and a second smaller piece for main jet clearance.
4. Trim top off (or not)
5. Label your tool
6. Make as many as you need. Trade them with your friends. Comes in many colurs