I am using DL-50 on 50CC Edge 540. Configuration:
23X8 Xoar Prop
50:1 Mobil Racing 2T
The engine has about 80 flights.

4 months back when temp was around 36C@1800Feet it was revolving at 6400 rpm. Now during winter season temp 13C it is just giving me hardly 6070 RPM at the most. I have set the ignition timing at 29 4 months back which is still the same. Re tuned to get the rpms back but of no use. It is not giving me more than 6070 in any case. Did one flight even the power response is not good. Can someone guide.