I know there have been a bunch of posts, about this but none have been in the prce range im talking about, most are lower in the RG price range. Im looking for a engine under $250. Right now im preatty convinced on the Rb concpet S7 to be the best engine i can get for that money. I know this engine produces great power, so iw anna know from the people who own these engines, honest opinions about their eas of tune, and how they last if taken care of, i want an engine that holds its tune, and will lasy me a long time. If the Rb concpet S7 isnt that then ill get somthing else.