You have to have the following:
(Webb County tax assessor's office forms)
Title Hearing Packet
-Indemnification form
-Affidavit & Application form
(Texas Dept of Motor Vehicle forms)
-TxDMV VTR-130-SOF Statement of Fact form
-VTR-130-U Application for Texas title
-VTR-131 Application for Title Only (if you aren't going to register the bike, just re-sell it)
-VTR-61 Rebuilt Vehicle Statement
-VTR-68A Application for Assigned or Reassigned Number (to be filled out by the local Police Dept)
(Other items)
-Valid bill of sale from a verifable source for AT LEAST the engine and frame (If you build your own frame, they'll want photos and receipts for the materials)
-Photos of the bike
-Receipts for purchase of major components including transmission and bodywork
-Pencil rubbing of serial number(s)
-Copy of NADA appraisal of your year/model bike
Once you have all this stuff done, you sit down with your county tax assessor's office investigator (may require an appointment) and they go over everything, ask some questions, search thier database, then sign off or tell you to get the &^%$# out of thier office and never come back. (The latter has never happened to me yet)
If they sign off, they pass you over to the clerks who take all the forms, key in the basic poop, take your money, and hand you receipts for fees paid and title application, and (in the case of registration) a new license plate (if you ALSO provided proof of Texas minimum liability insurance).