is a 2900kv motor system anygood and what kind of buggy would you use it in?

Pretty broad question

What brand of motor ?

What batteries do you plan to run with it ?

What size buggy do you want to put it in ?

Do you have an ESC to use with it ?

Cheers

its the hobby people one.

Lipo 2-3 cell

Ofna hyper 7....if possible

yes i do have an esc it is 2-3 cell capatible

Probably not too good of an idea to put it in the Hyper 7. I believe the motor you are refering to is better suited for 1/10 scale or light 1/8 buggies. That would be the hobby people Outlaw or the Losi 810.

Ok cool to bad bigger motors are so expensive