DEX 410 overheating issue

[Chequered Flag Racing]

Club member has an issue with wires desoldering and esc overheat protection coming in.

Only thing he's changed is to new batteries. Gone from Demon 35c to Nano-Tech 65c.

1st time round he killed his year old esc because he hadn't taken the timing out of the motor used for the old 35c cells. Now with new esc the wires are desoldering from the motor.

Read the forum and geared on standard spur and pinions from 19 to 23 on a 5.5 Tekin which we think he has now killed.

Drive train is free and no signs of binding that we can see. Same 65c batteries in the 210 are fine.

Phone pictures here
http://s1100.photobucket.com/albums/...4-18205357.jpg

Any idea's?