Nothing out of the ordinary, they are very well built machines. What year is it? Only real problems that I am aware of is if the oil was let go low in the rear dif they can be rough to rebuild and get right, but that is only from what I hear, I have never had any trouble with me 64 R50. I have never even had to set the points on the magnito. I just change the oil and ride it. They are fun to ride, mine has never been apart yet so it leaks out of every piece of rubber on the thing since it has all become hard as a rock but I wouldn't call that a deal breaker. Not sure on your model but on mine they even have a roller bearing on the wrist pin and an extra ring below the wrist pin and the only chain in the R50 pulls the throttle cable. That is really cool it looks like a tiny final drive chain.
