California laws regarding mirrors and turn signals for cars and motorcycles
Cars law
Mirrors
26709. (a) Every motor vehicle registered in a foreign jurisdiction and every motorcycle subject to registration in this state shall be equipped with a mirror so located as to reflect to the driver a view of the highway for a distance of at least 200 feet to the rear of such vehicle.
Every motor vehicle subject to registration in this state, except a motorcycle, shall be equipped with not less than two such mirrors, including one affixed to the left-hand side.
(b) The following described types of motor vehicles, of a type subject to registration, shall be equipped with mirrors on both the left-and right-hand sides of the vehicle so located as to reflect to the driver a view of the highway through each mirror for a distance of at least 200 feet to the rear of such vehicle:
(1) A motor vehicle so constructed or loaded as to obstruct the driver's view to the rear.
(2) A motor vehicle towing a vehicle and the towed vehicle or load thereon obstructs the driver's view to the rear.
(3) A bus or trolley coach.
(c) The provisions of subdivision (b) shall not apply to a passenger vehicle when the load obstructing the driver's view consists of passengers.
Amended Ch. 74, Stats. 1970. Effective November 23, 1970.
Motorcycle law
Motorized Bicycle: Safety and Equipment Requirements
24015. (a) Motorized bicycles shall comply with those federal motor vehicle safety standards established under the National Traffic and Motor Vehicle Safety Act of 1966 (15 U.S.C., Sec. 1381, et seq.) which are applicable to a motor-driven cycle, as that term is defined in such federal standards. Such standards include, but are not limited to, provisions requiring a headlamp, taillamp, stoplamp, side and rear reflex reflectors, and adequate brakes.
(b) In addition to equipment required in subdivision (a), all motorized bicycles operated upon a highway shall be equipped with a mirror as required in subdivision (a) of Section 26709, a horn as required in Section 27000, and an adequate muffler as required in subdivision (a) of Section 27150.
(c) Except as provided in subdivisions (a) and (b), none of the provisions of this chapter relating to motorcycles and motor-driven cycles, as defined in this code, shall apply to a motorized bicycle.
Amended Ch. 421, Stats. 1978. Effective January 1, 1979.
A neat fact, the law does not state what side the mirror has to be on for a motorcycle
Turn signal law
Turn Signal System
24951. (a) Any vehicle may be equipped with a lamp-type turn signal system capable of clearly indicating any intention to turn either to the right or to the left.
(b) The following vehicles shall be equipped with a lamp-type turn signal system meeting the requirements of this chapter.
(1) Motor trucks, truck tractors, buses and passenger vehicles, other than motorcycles, manufactured and first registered on or after January 1, 1958.
(2) Trailers and semitrailers manufactured and first registered between December 31, 1957, and January 1, 1969, having a gross weight of 6,000 pounds or more.
(3) Trailers and semitrailers 80 or more inches in width manufactured on or after January 1, 1969.
(4) Motorcycles manufactured and first registered on or after January 1, 1973, except motor-driven cycles whose speed attainable in one mile is 30 miles per hour or less.
The requirements of this subdivision shall not apply to special mobile equipment, or auxiliary dollies.
(c) Turn signal lamps on vehicles manufactured on or after January 1, 1969, shall be mounted not lower than 15 inches.
Amended Ch. 475, Stats. 1975. Effective January 1, 1976.