ncymotorsports' Profile NCY, San Diego motorcycle dealer that makes sales process ease for you can enjoy your new motorcycle or ATV. North County Yamaha. Getting a new motorcycle or ATV is not a small thing, we make it easy. We're here to make your weekends incredible. The most human San Diego Motorcycle dealer. No pushy sales, come and let’s talk of that Yamaha, KTM or Polaris of your dreams that you want! We get the best financial deals.