I just bought a 1998 KDX 220R with a pro circuit pipe and V force reed. Its my first 2 cycle bike so I'm sorry if I sound dumb about the subject but I have a few questions I hope someone can help me with.

1. What should be the top speed of this bike with a 230 pound guy on it? I'm guessing my bike is running about 70-73 mph.

2. Is a K and N air filter worth the investment for this bike?

3. The bike has never been rebuilt,.. but it starts with just ONE kick. Would you even think about a top end rebuild?

Thanks for all your help.