It should be fine. The Mamba max is a very capable esc, and that motor is only going to push 105amps in short bursts, if ever.

MM used to run our truggies and MT with no issue - for 3/4s use you need to use an external BEC and I always like to add an extra cap to.

ok the max amps draw of a brushless motor like 105a it is not continuous ? only in short bursts for a few second right ?

Its a guide - on average you'll probably be running at 20-30 amps

ok cool! and now my last question if I bought this medusa 36-60 2000kv do you think I can run it on my other rc's ? 1/8 brushless truggy @ 4s ....

Definitely! the 36-6-2000 is a good choice for a buggy on 4 or 5s, geared appropriately. You can even run that in a MT like Emaxx or Revo...

do you think a medusa 36-60-2000kv @ 4s on my crt.5 would be alot overpowered ? do can hold up fine ?

It would work, overpowered and overweight maybe... You could probably get away with a smaller mAh lipo and still have good runtimes while losing weight.