I had an bra(..er..)inspiration recently about a cleaner navigation for the forum. While the dropdown menu at the top is very compact it's never quite sat well with me.
What I'm thinking is to change the top navigation strip into a series of high level links like
About | Why/How | Bicycles | Scooters | Motorcycles | Cars | Other | Racing | Components | Marketplace | Reference
Each would link to a navigation page which has pointers to all the stuff for each area. I've got an initial stab at -- http://visforvoltage.org/electric-scooters -- that covers electric scooters, of course.