Welcome to Mountain Motorsports!

New & Used Motorcycle, ATV & UTV Dealer in Southern California - Dirt Bikes, Polaris RZR UTVs for Sale; Motorcycle Parts & Accessories in CA

View online motorcycle inventory or parts and accessories catalogs!

Mountain Motorsports is located in Ontario, California, and is just a short drive to Upland, Inland Empire, Fontana, Chino Hills, Temecula, Rancho Cucamonga, Montclair, Rialto, Pomona, San Dimas, Claremont, La Verne, Glendora, San Gabriel Valley, Brea, Anaheim, Riverside, Moreno Valley, Covina, Corona, Diamond Bar and Norco, Orange County, Los Angeles County and the High Desert area.

Mountain Motorsports is your premier powersports dealer for new and used dirt bikes, utility vehicles and more! See our inventory by category: ATVs, go-karts, motorcycles, scooters, utility vehicles especially the Polaris RZR line of UTVs.

We are an authorized dealer for new Honda, Suzuki, Husqvarna and Polaris motorcycle, ATV, scooter, 4x4 utility vehicle sales. In addition to our large selection of new dirt bikes and UTVs from Suzuki, Polaris, Honda and Husqvarna; we have one of the largest used motorcycle, scooter, ATV and UTV inventory in Inland Empire and Southern CA. We stock used sport and dirt bikes, cruisers, dual-sport bikes, touring bikes and other types of used off-road and motocross vehicles. Find used motorcycles from trusted manufacturers like Honda, Yamaha, Kawasaki, and Suzuki. We have a huge inventory of popular sport bikes such as CBR600RR, CBR1000RR as well as side by side utility vehicles from Polaris including RZR UTVs.

Our great customer service doesn't stop after the sale. We service your motorcycle or ATV! Save time by scheduling your next service appointment online. We also sell parts and accessories online from all major OEMs and distributors 24 hours a day, 7 days a week. Mountain Motorsports also offers an OEM parts fiche from Honda, Polaris, and Suzuki, as well as aftermarket parts, gear, and tires from brands like Yoshimura, Fox Racing, Shift MX gear, Joe Rocket, Icon helmets and jackets, HJC, Bridgestone and Dunlop.

If you are in SoCal, stop by Mountain Motorsports today!