Car cutting out.

[2175shaun]

I am currently running a DEX210 with speed passion 10.5t motor and a speed passion cirtix stock club esc.
I have recently started having a problem with the car cutting out after about 5 mins running. I can then turn car off and back on straight away and it will run fine for about another 5 mins. Battery fully charged, gearing is 81/27, No excessive heat from motor or esc.

Any help or advice gratefully received