thats fine what ever oil ratio he wants to run is fine its my opinion on what i think runs better but on the racing end
your right the frame is week but only on certain points have them points beefed up and the frame is fine never had a break on mine and i race mine like crazy there is alot of cheap suspension parts you can run i run stock and i easliy keep up with 450s on the track that are modded the 400s i can blow away its all in how you ride because im sittin on a stock bore new hot rod crank all new fresh up on motor alot better carb then stock and all my money went twords messing with the handling here and there these are very good quads to race with not the best but are very competitive but depending what you want to do you will have to have it set up different.