I just finished building the Super II Chassis with Plasma Dash & 3.7:1 Gear, but i cannot get consistent run i need help to see if my motor is running as it should. Now I'm not trying to improve the car but want to make it consistent and most important to check everything is performing like it should so here are the spec: Car: Shirokumakko Super II Weight (with batteries): 130g Motor: Plasma Dash Gear: 3.7:1 Hollow Mid Shaft Metal Hex Ball Bearing Batteries: Sanyo Eneloop Reinforced Pinion & Gear set (Black) Rest are stock I'm running on Speed Testor and i get random results on different sessions... 1st day: 35km/h (3.5:1), no break in just Tamiya Grease. notice same day later sessions the speed will keep dropping. 2nd day: 38km/h (3.7:1) changed the gear as i mistaken light blue as highest gear. Got between 37-38km/h but did not run long. 3rd day: decide to take the motor out to "break in" without load. spraying RP7 while it's running, did x3 2-3 minutes forward & x3 2-3 minutes reverse. Dip the motor (half filled) into Zippo Lighter Fluid for cleaning. Then i added Semi-Synthetic Engine Oil into it and let everything settle & grease the gears up. The speed is now back to 35km/h... and after a while it's now back to 30-31km/h even after swapping the batteries. So I'm baffled how inconsistent my car is. i'm not sure if the Speed checker is giving inconsistent readings and since the Speed Checker is also New does it affect the consistency? I know the Eneloop aren't the best batteries for Plasma Dash but why the big difference in speed?