Rotor dimensions are critical to performance. Unless you talk with an 'expert', use a 12.5mm rotor for best overall performance. Drag Race winds can benefit greatly for larger rotors but ask!
PLEASE NOTE: The number one discussion a racer has with me is the R5 or R6 running hot. A new racer to the R5 & R6 typically gears the same as their other motors without regard to what the R5 & R6 wants for gearing. EXPECT to reduce the teeth number on your pinion by at least three teeth (for example, if you typically run a 30 tooth pinion, use a 27 for your initial testing). Do this, and run a fan, you will see great performance from the R5 & R6. The following chart is a suggestion only!
KV Rating: Tested on Motolyser and will vary by rotor size and type installed (all motors tested with 12.5mm rotor diameter). These are actual average values as tested.
SUGGESTED MOTOR USE
*Timing/OAR: Suggested starting point (Monitor temp!). Use motor checker to confirm timing. Will depend on intended use, track size, and OAT!
| Wind | Rotor (Std/Opt) | Use | KV |
*Can Timing |
*OAR |
| 3.0 | 12.5/13.0/13.5 | Drag | 11300 | ||
| 3.5 | 12.5/13.0/13.5 | Drag | 9600 | ||
| 4.0 | 12.5/13.0 | Drag | 8400 | ||
| 4.5 | 12.5/13.0 | Drag | 8050 | ||
| 5.0 | 12.5/13.0 | Drag/Drag | 7700 | 21 | |
| 5.5 | 12.5/12.3/12.0 | Oval/Drag | 7100 | 25 | 10.40 |
| 6.0 | 12.5/12.3/12.0 | Oval/Offroad | 6700 | 33 | 9.50 |
| 6.5 | 12.5/12.3/12.0 | Oval/Offroad | 6100 | 32 | 9.50 |
| 7.0 | 12.5/12.3 | Oval/Offroad | 5700 | 34 | 9.16 |
| 7.5 | 12.5/12.3 | Oval/Offroad | 5550 | 36 | 8.74 |
| 8.0 | 12.5 | Oval/Offroad | 5300 | 39 | 8.42 |
| 8.5 | 12.5 | Oval/Offroad | 5200 | 39 | 8.32 |
| 9.0 | 12.5 | Oval/Offroad | 4700 | 39 | 8.32 |
| 9.5 | 12.5 | Oval/Offroad | 4400 | 39 | 8.32 |
| 10.5WMW | 12.5 | Oval/Offroad | 4200 | 38 | 8.10 |
| 13.5TEX | 12.5 | Oval/Offroad | 3400 | 44 | |
| 10.5 Spec | 12.5 Spec | Oval/Offroad | 4650 | 46 | |
| 13.5 Spec | 12.5 Spec | Oval/Offroad | 3700 | 46 | |
| 17.5 Spec | 12.5 Spec | Oval/Offroad | 3000 | 48 | |
| 21.5 Spec | 12.5 Spec | Oval/Onroad | 2500 | 46 | |
| 25.5 Spec | 12.3 Spec | Onroad | 2000 | 46 |