Yes capt i have a regular motor, but for 4s i suppose 2600 Kv is ok, 2600*14.8=38480 Rpm, the gearin is the smallest i have my smallest pinion is 12 and the kyosho spur is 44.
I have a 1940/8, but 1960 Kv is not too slow for 4S???
1960*14.8= 29000 Rpm
for gearing down you have to put in a bigger spur or a bigger pinion
i dont know if you have a 46 tooth spur, but you can try that