I used to have a 22r in a rn105 lux. I was looking at supercharging it & done lots of research. There are lots of mods you can get from the usa but $$$$. To get any kind of decent power gains from that motor you have to dig very deep. Put a better motor in it. I abused my 22r & it never let me down. My advice is put up with what you have or swap the motor for something with more power. It will be cheaper to swap professionally instead of mod the 22r.