Well, when i had my brushless lsp, i ran a 9xl with 16 cells on the Quark 125 geared 15/51 and NEVER EVER thermaled the controler. This is running for about an hour, under race conditions, in 85F+ weather too.....

Also, try and reprogram your controler.

Come to think of it, i have never had the Quark over 140F.............



Hope this helps.......

Bye :018:

*EDIT* BTW i am running heat sinks on my Quark..............