I am not an Aprilia owner but I am thinking of buying a motorcycle that comes with a Minarelli AM6 engine, and because there seem to be a few very knowledgeable people on this forum in regards to it, I figured I would ask my questions here. I hope you guys don't mind!
The motorcycle in question is a CPI Supermoto50. I'm approximately 180cm in height and about 60 kilos, before this bike I have owned various motocross bikes (Yamaha YZ80, KTM 300 MXC), but never had something road legal.
Anyway, my questions are pretty simple.
1. In totally stock trim, how reliable is the AM6 engine? What sort of RPM's can it run continuously without damaging itself? What sort of fuel should you run in it (I seem to remember the CPI requiring 95 octane, supposedly it has 12:1 compression ratio stock, but that seems a little high for a stock motorbike).
2. Is there are danger in converting the bike to premix? I know some older Japanese 2-strokes had oil injection that actively oiled the crank bearings, and if you premixed them, that would drastically lower the life span of the crank.
3. Is it possible to tune the engine for better midrange power? I am planning on riding mostly offroad with it (forests etc) but I need to retain road-riding ability to drive from my garage to the woods first, and not get pulled over by the police. At what displacement (50cc, 70cc, 80cc, +++) should you replace which parts, meaning what else do I need to upgrade if I'm planning on installing, for example, a 75cc big bore kit and exhaust?
Thanks in advance for your time!