I recently purchased a CEN MT2 and with the stock tires on it seems to bounce a lot when climbing at speed or when landing after going of small jumps. How much would foam tire inserts help? I believe that any brand of 2.2 tire inserts will work, am I correct in thinking this?

inserts will help alot. and any 2.2 designed for MT wheels will work. You will also want to decide how dense you want the inserts. the softer they are, the more give they will have.