a buddy of mine is loking at building a mod quad for his son and has come across a 250r rolling chasis he got real cheap/ Does anyone know how much these things way without the big motor/ and would they run good with a 65 motor that has been pushed to a 70. Thanks for any help. I know they make frames to do these quads with for the small motor but he is not a rich man but his kid keeps destroying the small quad frames.