This.
WheelSports is a dirt dealer. Always has been. They only sponsor and support dirt racing. They have no interest in street or street customer base so no reason to carry street. Not sure why that's odd to you many dealers do it.
Take Iron Pony for example. How many boats, skis, cars do you see there? Suzuki and Honda make
cars
Yamaha, Polaris, Canam and Honda all make water craft. And snowmobiles
When we raced at Road America and our Zuma broke we drove past two Yamaha dealers to get to one that carried scooters to get a part. It's common practice.