Help!!! considering purchasing a 1988 Husqvarna 510TC

I found a low hour great condition Husky 510 TC. I would ride it in vintage motocross a few times a year. I’m worried about reliability, starting, and parts availability. I’ve owned many 4-strokes over the years. I know the importance oil changes, checking valve clearance. I heard a carb switch can help starting tremendously. Does anybody rebuild these motors anymore. Any help would be much appropriated