Just a further note that the 2.5 HP gas engine from Harbor Freight looks to have 79 cc's. From the bit of Google research I just did, it seems that many states have a requirement to be 48cc's or under to avoid registration and the need for a motorcycle or scooter license. This would seem to quite probably apply to the "pusher" device that looks kinda neat too.<br /><br /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">ARIZONA HB 2796</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">START_STATUTE</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">28-2516. Motorized electric or gas powered bicycles or tricycles; definition</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">A. Notwithstanding any other provision of this title:</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">1. A certificate of title is not required for a motorized electric or gas powered bicycle or tricycle.</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">2. Registration is not required for a motorized electric or gas powered bicycle or tricycle.</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">3. Vehicle license tax is not imposed on a motorized electric or gas powered bicycle or tricycle.</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">4. A motorized electric or gas powered bicycle or tricycle is exempt from the provisions of section 28-964 relating to required equipment on motorcycles and motor-driven cycles and from the provisions of title 49, chapter 3, article 5 relating to vehicle emissions inspections.</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">5. A driver license is not required to operate a motorized electric or gas powered bicycle or tricycle.</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">6. A motorized electric or gas powered bicycle or tricycle may use rights-of-way designated for the exclusive use of bicycles.</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">7. A motorized electric or gas powered bicycle or tricycle is not subject to chapter 9 of this title.</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">B. For the purposes of this section, "motorized electric or gas powered bicycle or tricycle" means a bicycle or tricycle that is equipped with a </span><strong style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;"><span style="color: red;">helper motor that has a maximum piston displacement of forty-eight cubic centimeters or less</span></strong><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">, that may also be self-propelled and that is operated at speeds of less than twenty miles per hour.</span><br style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px;" /><span style="color: #24313f; font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; background-color: #e6e5e6;">END_STATUTE</span>