pulling motorcycle with rv. Open trailer or closed trailer

Considering the width of the back end of the trike it's going to be even more susceptible to stuff thrown up by the MH. Definitely go with an enclosed trailer. Double check dimensions, but a 6x10 v-nose trailer would be my first choice. Check out buying factory direct from The Trailer Showroom. You can probably get away with a single 3500# axle and the torsion axle will keep the loading height at a minimum. I'd recommend 16" on center floor cross members as well. After that the sky's the limit.