California motorcycle laws: lane splitting, helmets and more

This page explains California motorcycle laws in plain English so riders know what to look up. It is not legal advice and it doesn't cover every condition or exception. Laws change. Before you rely on anything here, read the source and talk to a lawyer about your own situation.

The CHP publishes general lane splitting safety tips on its site. The theme is consistent: the bigger the speed difference between you and traffic, and the faster everyone is going, the more dangerous it gets. Think about lane width, vehicle size, the road, weather and light before you split.

Drivers have a part too. The California driver handbook tells drivers it is illegal to deliberately block or impede a motorcyclist in a way that could cause harm, or to open a door to impede one. That doesn't mean every driver knows it. Assume they don't see you.

California requires every motorcycle rider and every passenger to wear a safety helmet that meets the federal standard for motorcycle helmets, FMVSS 218, usually called the DOT standard. The requirement is in Vehicle Code Section 27803, and it has no age exemption. The helmet has to be worn and fastened, not just carried on your head.

Look for the DOT certification label inside or on the back of the helmet. So-called novelty helmets without it don't meet the standard. The IIHS state helmet law summary lines California up against every other state.

California issues a Class M1 license or endorsement for motorcycles and a Class M2 for smaller motorized bicycles and mopeds. You start with an instruction permit after passing the knowledge test at the DMV.

Riders under 21 have to complete a California Motorcyclist Safety Program (CMSP) course on the way to an M1. Riders 21 and older can take the same course to skip the DMV riding skills test. An instruction permit comes with limits, including no passengers, no night riding and no freeways. Requirements change, so check the DMV for the current steps. New to riding? Our page on the motorcycle app for beginners covers the first season.

A passenger needs a proper seat and footrests on the motorcycle, and, like the rider, must wear a helmet. California also has equipment rules covering things like lights, mirrors and handlebar height. Check the Vehicle Code before you modify a bike.

Exhaust deserves its own note. Under a 2010 state law, motorcycles from model year 2013 and newer have to run an exhaust system that carries the federal EPA label for that bike. Pipes without the label can get you a ticket even if they aren't especially loud.

Motorcycles can use California carpool (HOV) lanes even with only the rider on board, unless signs say otherwise. Toll express lanes have their own rules, and some require a transponder to ride them free, so check with the lane operator.

California's hands-free law bars holding and operating a phone while driving. On a bike, mount it, set your route before you roll, and pull over to change anything.

Carry your license with the motorcycle class, your registration and proof of insurance. California requires liability insurance or another form of financial responsibility, and the minimum amounts went up in 2025, so check the DMV for the current figures.

Riding in a group doesn't change the rules for any one rider. Each bike follows the same traffic laws, and splitting in a group multiplies the risk. Regroup at stops instead of running yellows to keep up.

Tap Record Ride once before you roll, pocket or mount the phone, and ride. Recording runs in the background and you tap Stop at the end, so there's no reason to touch the phone on the move.

Segments in Rippin' are stretches of road a rider added. Ride through one and you're timed automatically, but the board is about who owns the road and who rides it, not a race. Turf, poker cards and points all come from riding, not from riding fast. That matters on the roads in our California roads guide, where Ortega, Palomar and the Malibu canyons all see heavy enforcement.

Set a home privacy safe zone so the part of your rides near home stays hidden, and use group rides so the crew is on one live map and nobody has to rush to keep up. For the state overview, see the California hub.