HMM LOOKing at my NEW CEN CT5 manual, and nothing in the CT5 manual about breakin, BUT WITH MY CT5 manual CAME A CEN NITRO HANDBOOK, hmm a MANUAL just for the ENGINE< SAY IT AINT SOOOO>>> NO ONE EVER DOES THAT... and in the engine manual, it states, and i quote: \

Step 15. Break-in procedures
Lean=less fuel Rich=more fuel

"To properly break in your new engine simply drive your model around keeping the RPMs of the engine low. Do not run the engine at full throttle until a couple of tanks have been ran. Let the engine cool down between tanks. Do this for about 3 tanks of fuel then you can start to lean the engine out.

Step 16. Running the first tanks in the car.

By now you should have ran at least three tanks of fuel through your new engine. Hopefully you took your time and broke the engine in correctly. When driving the car, drive it on a flat smooth surface like the street first. Make sure that your steering trim is adjusted correctly and that the car tracks strait. There is also a dual rate adjustment for the steering throw you have. (How much the wheels actually turn).

Step 17. Adjusting the high-speed mixture screw.


Now your car and engine should be up and running well. the overall performance of the engine is determined by how lean you run the engine. the "leaner" the engine, the faster it will go, and the hotter it will run. You want to find the point where its running very well with lots of power, but not running too hot. If you dont see a light stream of blue smoke from the exhaust, it may be too lean. You then need..... ect. ect. ect..."

that is quote/unquote from my 3 week old CEN CT5 with the NX15 engine...
this isnt rocket science, but to newbs it appears to be...


js0485, do a complete recheck and set up of the radio equip, get extra batteries, you ll want them, leave truck unrunning, turn on radio/electronics. pull trigger and see the slide carb is performing properly, ie. is closed when trigger is at idle. is full open when trigger is pulled all the way, doesnt move when brakes are applied... ( allow for some adjustment. you may only get 8/10 of the trigger pulled when the carb hits WOT. adjust your epa to take up the differance as to not over torque your servos and stress the gears inside.) im willing to bet you ve got an errand adjustment, or the throttle channle (usually chnl2) is or needs to be reversed. something simple, check all your radio gear. if it all checks out, start her up on a test stand. see what it does. watch it for wierd reactions. could be just a loose crystal, reseat them to be sure.

Good Luck
Tim