That Mk2 Aprilia is a steal, while the RZ can be bored/stroked/bored/stroked to 500 odd cc nothing can escape the early 80's handling. The Aprilia on the other hand can go to 65hp easy and will redefine what you previously thought was a good handling bike. Spending $200 odd on a Ducati 5.5in rear wheel takes you to GP250 handling then you can use the last of the non radial 4 pad calipers with HH pads with a 19mm radial pump master cylinder. That braking set up has sooooo much feel and power no matter how hard or late you brake you will still pull up to early of the corner. Even a good stock engine with that tyre and brake set up will have you smiling for many hours after you fisished riding.
* We have fixes for the RGV/RS achillies heels with the dodgy rod/piston and the power valve. If you want to know what to look for just send me a FB message or PM here.