My 2005 Honda VTX 1800 doesn't start, changed battery no help. Neutral light goes out as soon as I hit the start button

Question edited for clarity.
Question moved from Cars and Trucks.

That isn't enough voltage. It starts using the momentum when the starter cut power.Put the battery on a full size battery charger overnight and try again. Take it to an Interstate Battery shop and ask them to test it. Takes 2 minutes on the bike and you get a print out..

Dead battery or blown fuse

it has a gov. on it it a saftey thing

Go here and hit the download button.

http://printer1.blogspot.com/2009/07/honda-vtx-1800-service-manual.html

Check the battery terminals and the main earth connection. Also symptomatic of a dying battery. The voltage seems to be dropping right off as soon as you put a significant load on.

starter solenoid could be bad