Take it easy the first time out, let everything have a chance to break in. I would give it a race day and everything should be broken in. I would then clean the diffs and put new oil in, as the gears will leave some metal behind as they break in.

Here are some tips: These are for the nitro car, but some things carry over.

Tips,Tricks, and spare parts I would recommend.
1) Shims on diffs. In the manual it says 2 shims behind the bearings on the case side. I would put 1 on case
side, 1 on gear side. It will be a little tight but wear in nicely
2) Grease or oil the bearings
3) Brake disks, sand lightly with 600 grit in circular motion
4) I put heat shield tape on the side of my tank because the 9901 is so close, whether it does anything or not..
who knows.. just a piece of mind
5) If you turn the wheels and compress the suspension you will know the tires bump in. I add 3mm washer under
ball on steering knuckles and steering rack to take that out. Make sure you loctite the balls because they will be
a little short and not catch the locking on the nut.
6) Plastic nuts and washers for flat head screws are in the box, not in the first couple bags of assembly.
7) For V2 radio tray make sure you use the new brake arms they pull forward instead of back
8) Tap screw holes half way into diffcases for easier assembly 3x.05 tap, a little oil or grease helps also
9) Front drive shafts go into the outer holes on the axles to make the shafts as long as possible, rear use holes
to make drive shafts short as possible
10)Reedy 2100 lipo #631
11) Take a dremel and round off the pins for the shocks so they are easier to put through the arms and shocks
12) Use aluminum steering servo arm
Parts the car may need to help it on the track or make it tougher then it already is:
600267 - low roll rear block, most drivers are using this now
extra outer hub bearings
600240 - front swaybar 2.3
600349, 600350, 600351 - 6 8 10 hole taper pistons
600299 - one piece engine mount, makes chassis stiffer and easier to put the engine back in
600288, 600289 - alum chassis braces front and rear , #1 investment you can make
600300 - alum wing post, Keeps wing straighter longer
600330 - hard servo saver spring
600282 - delrin shock bushings, shock caps last longer
600284 - alum front tower. Cost less than std graphite one and good to have a spare
600347 – 7075 shock caps last longer
600133 - rear wing mount
600238 - rear swaybar 2.5, most drivers are using this now
front swaybar 2.0 losi, some drivers are using this now
600254, 600255, 600256 - rear springs 3.2, 3.4, 3.6
600246, 600247 - front springs 5.0, 5.2
600298 - for better acceleration and more traction use steel flywheel
600172 - #2 ackerman plate, most drivers are using this now