Montana Motorcycle Laws - View All States Motorcycle Laws
We have put together a simple list of the primary Montana state motorcycle laws to help you when traveling through Montana on a motorcycle. These Montana motorcycle laws where confirmed accurate as of the time of publishing and are provided to you as a reference only. For Montana's complete motorcycle laws, please visit the Montana state Motor Vehicle website.

Safety Helmet: Required by law under age 18
Eye Protection: Not Required
Passenger Age: No Restriction
Helmet Speakers: No Restrictions
Mirrors: One required by law
Headlight: Daytime headlight required. Modulating headlight permitted.
Turn Signals: Not Required
Handlebars: No Restrictions
Muffler: Muffler required.
Noise Restrictions: Max A-weighted sound levels based on measurement at 50 feet from closest point to motorcycle (61-9-418): 1)manufactured before 1970--92dBA; 2)manufactured after 1969 but prior to 1973--88dBA; 3)manufactured after 1972 but prior to 1975--86dBA; 4)manufactured after 1974 but prior to 1978--80dBA; 5)manufactured after 1977 but prior to 1988--75dBA; 6)manufactured after 1987--70dBA.
Riding Two Abreast in Lane: No more than two motorcycles may be operated side by side in a single traffic lane. (7) All motor vehicles, including motorcycles and quadricycles, are entitled to the full use of a traffic lane, andd in a manner that deprives any other vehicle of the full use of a traffic lane, except that motorcycles may, with the consent of both drivers, be operated no more than two abreast in a single traffic lane.
Lane Splitting: Montana passed a bill in 2021 allowing lane filtering in specific circumstances. You can’t ride faster than 20 miles per hour when lane filtering, and you have to stay within ten miles per hour of the cars around you. The lanes also have to be wide enough for you to safely lane split, and traffic and road conditions must be safe enough to justify it.
Insurance: Compulsory Liability (Minimum Limits 25/50/10)

These state motorcycle laws very verified as current at the time they were published on this page. Some laws may have been changed or repealed and new laws may have be added. Check with state and/or local authorities for the most up to date laws and regulations.