Here's the recommended list of plumbing parts you'll need to complete the installation:
Parts List
The most difficult part of the installation: you must remove the sending unit plate in your stock tank and drill a hole in EXACTLY the right place for the bolt-on bulkhead fitting to clear the working parts of the sending unit and gasket area.
Removing the lock ring is best done with the special Honda OEM tool and a 1/2" drive breaker bar.
It is critical that you measure twice and drill once!
The fitting shown in the photo is welded on and the location for the bolt-on fitting is left of what is shown. The large o-ring-washer underneath the fitting fits just under the back of the sending unit bracket and inside the gasket area (you can see the sealing area of the o-ring on the bottom of the plate once you get it off). On '06 plus model years you will have to carve out part of the fuel tank, inside the gasket groove, to make space for the large nut on the bulkhead fitting. The fitting must go on the low side of the plate to allow the seat hook to fit back under the rail.
Line Routing
Route your new fill and vent lines as follows:
Secure the fuel line from your new bulkhead fitting to the frame.
Route the fill line so it follows the frame and exits beside the seat.
Run the vent line behind the rear fender and under the trunk. Secure it to the subframe.
Exit the vent line between the seat and trunk pocket.
Disconnects shown here are Chrysler Marine units. The Sampson units are smaller, but this is where the disconnect should lie when the seat is reinstalled.
When the tank is not installed you should cover the disconnects with something like an old film bottle to keep the dirt out. Punching a half inch hole and making a slot in the film cap makes this easy.
Here's the recommended list of plumbing parts you'll need to complete the installation:
Parts List