I have an Areo 80 and I have cleaned this little beauty up. I cleaned the carb and rejetted to 2#s up from the stock (#82). Cleaned the bore and piston also. Stock parts ( I want to add a tuned pipe soon) and it runs at about 43-45, with lotts of climing power!
I will be glad to let you know some of the tricks I have found out about the transmission and carb.