If you are talking of the first version of the lrp sxx stock spec, you have to check the version of the firmware installed on your unit; there are 3 software version released in order to solve some bugs.
Turn on your speedo with the motor connected and with the radio setup done correctly, then pay attention at the motor beeps:
- no sound from you motor = lrp sxx stock spec MK1
- two beeps from you motor = lrp sxx stock spec MK2
- three beeps from you motor = lrp sxx stock spec MK3
The MK1 version was unusable for everyone ...
The MK2 version sometimes was usable, but there are a lot of problems regarding the transmitter compatibility (however when it works it is faster than the MK3)
The MK3 version is the latest and works always quite well, but still got some problem when used with the spektrum branded transmitter modules.
Note that if your speedo is a MK1 or MK2 the only way to upgrade to the MK3 is to send your unit back to LRP.
Hope that helps.
Bye
Ema
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