...you can carry a shotgun in your car, in your truck in a gun rack or on your motorcycle if you are so compelled.
What's legal and sensible are 2 different things sometimes though.
LOL, I used to ride with a guy who welded a vertical post to the bottom of the trigger guard of an old .38 revolver, and welded that to the top triple tree of his knucklehead chopper (after having the whole assembly chromed) so that the .38 was a little above the level of his handlebars but pointed straight forward (actually, whatever way the front wheel was turned). It bought him lots of space from car drivers but tons of hassle from cops, even though it was technically legal. Way not worth it to me, but obviously his mileage varied...Wish I could find the picture of the guy on a motorcycle with an AK on his back.