Okay, talk to the guys at the track, and get the proper tires. Ask the fast guys. The correct tire, is mandatory.
Next, get a good selection of springs and shock oil. It's also important to have the right gearing, so get some pinon and spur gears, if you dont got them already. The guys at the track, can suggest a good starting point for the gearing.
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250