I've been looking for a quarter midget for my son. Maybe two, one for my daughter, too. I've been told Nervo (NC) Chassis are good, and popular in the Midwest. Easy to get parts, too. Similar for Bulldog. Stanley is popular on the West Coast, but not so much here.
Should I commit to one brand, or are parts somewhat interchangeable? What brand/model? We need a medium size. If I get too old of a model, or wrong model, am I screwed?
It's been 25 years since I helped a nephew with his older quarter midget. I would suggest researching as much as possible, contacting your area midget organization and make friends with some racers and attend races with them. The sport is highly competitive and can be expensive if you want to run at the front. However, the cars are great platforms to learn chassis setup, tires and driving skills.
I know you said quarter midgets, but I'll give the same advice I would for sprint karts. Hang out at the track that you plan on going to to see what's popular and what has support.
I assume they'll be helpful to newbies on setting things up and helping out. I always helped new folks as much as I could, but sometimes you'd get someone who bought a chassis and/or motor online that nobody locally ran. So, when something would break, we couldn't help much. Hated seeing someone excited to start a new sport and have a day (or weekend) end early because of broken parts that would have to be ordered.
-Rob