Answer:
Ok here is a start.....
Eye protection, mirrors, DOT tires, turn lights brake lights, horn. SOmeone in COlorado springs got their quad registered as a kit dunebuggy.
Legally you don't have to have a windshield. see item 4. (the exception referred to in 42-4-232 is for motorcycles)
= 42-4-229. Safety glazing material in motor vehicles. (http://198.187.128.12/Colorado/lpext.dll?f=FifLink&t=document-frame.htm&l=query&iid=57a94281.1a06b759.0.0&q=%5BGroup%20%2742-4-229%27%5D)
Statute text
(1) No person shall sell any new motor vehicle, nor shall any new motor vehicle be registered, unless such vehicle is equipped with safety glazing material of a type approved by the department for any required front windshield and wherever glazing material is used in doors and windows of said motor vehicle. This section shall apply to all passenger-type motor vehicles, including passenger buses and school buses, but, in respect to camper coaches and trucks, including truck tractors, the requirements as to safety glazing material shall apply only to all glazing material used in required front windshields and that used in doors and windows in the drivers' compartments and such other compartments as are lawfully occupied by passengers in said vehicles.
(2) The term "safety glazing materials" means such glazing materials as will reduce substantially, in comparison with ordinary sheet glass or plate glass, the likelihood of injury to persons by objects from exterior sources or by these safety glazing materials when they may be cracked or broken.
(3) The department shall compile and publish a list of types of glazing material by name approved by it as meeting the requirements of this section, and the department shall not, after January 1, 1958, register any motor vehicle which is subject to the provisions of this section unless it is equipped with an approved type of safety glazing material, and the department shall suspend the registration of any motor vehicle subject to this section which is found to be not so equipped until it is made to conform to the requirements of this section.
(4) No person shall operate a motor vehicle on any highway within this state unless such vehicle is equipped with a front windshield as provided in this section, except as provided in section 42-4-232 (http://198.187.128.12/Colorado/lpext.dll?f=FifLink&t=document-frame.htm&l=jump&iid=COCODE&d=42-4-232&Sid=57a94281.1a06b759.0.0#JD_42-4-232) (1) and except for motor vehicles registered as collectors' items under section 42-3-219 (http://198.187.128.12/Colorado/lpext.dll?f=FifLink&t=document-frame.htm&l=jump&iid=COCODE&d=42-3-219&Sid=57a94281.1a06b759.0.0#JD_42-3-219).
(5) Any person who violates any provision of this section commits a class B traffic infraction.
History
Source: L. 94: Entire title amended with relocations, p. 2264, § 1, effective January 1, 1995. L. 2005: (4) amended, p. 1173, § 10, effective August 8.
Annotations
Editor's note: This section was formerly numbered as 42-4-226 and the former section 42-4-229 (http://198.187.128.12/Colorado/lpext.dll?f=FifLink&t=document-frame.htm&l=jump&iid=COCODE&d=42-4-229&Sid=57a94281.1a06b759.0.0#JD_42-4-229) was relocated to section 42-4-231 (http://198.187.128.12/Colorado/lpext.dll?f=FifLink&t=document-frame.htm&l=jump&iid=COCODE&d=42-4-231&Sid=57a94281.1a06b759.0.0#JD_42-4-231).
Annotations
C.J.S. See 60 C.J.S., Motor Vehicles, §§ 38-40.
Editor's note: This section was formerly numbered as 42-4-224 and the former section 42-4-227 (http://198.187.128.12/Colorado/lpext.dll?f=FifLink&t=document-frame.htm&l=jump&iid=COCODE&d=42-4-227&Sid=57a94281.1a06b759.0.0#JD_42-4-227) was relocated to section 42-4-230 (http://198.187.128.12/Colorado/lpext.dll?f=FifLink&t=document-frame.htm&l=jump&iid=COCODE&d=42-4-230&Sid=57a94281.1a06b759.0.0#JD_42-4-230). =
(3) "Off-highway vehicle" means any self-propelled vehicle which is designed to travel on wheels or tracks in contact with the ground, which is designed primarily for use off of the public highways, and which is generally and commonly used to transport persons for recreational purposes. "Off-highway vehicle" does not include the following:
(a) Vehicles designed and used primarily for travel on, over, or in the water;
(b) Snowmobiles;
(c) Military vehicles;
(d) Golf carts;
(e) Vehicles designed and used to carry disabled persons;
(f) Vehicles designed and used specifically for agricultural, logging, or mining purposes; or
(g) Vehicles registered pursuant to article 3 (http://198.187.128.12/Colorado/lpext.dll?f=FifLink&t=document-frame.htm&l=jump&iid=COCODE&d=t.%2042,%20art.%203&Sid=57a94281.1a06b759.0.0#JD_t42art3) of title 42 (http://198.187.128.12/Colorado/lpext.dll?f=FifLink&t=document-frame.htm&l=jump&iid=COCODE&d=t.%2042&Sid=57a94281.1a06b759.0.0#JD_t42), C.R.S.
http://198.187.128.12/Colorado/lpext.dll?f=templates&fn=fs-main.htm&2.0
(4) No person shall operate a motor vehicle on any highway within this state unless such vehicle is equipped with a front windshield as provided in this section, except as provided in section 42-4-232 (1) and except for motor vehicles registered as collectors' items under section 42-3-219. in which 42-4-232 is for motorcycles and 42-3-219 is for collectors items
c) refer to http://www.colorado4x4.org/vbb/showthread.php?t=87262&highlight=windshield