wheel spacers

i think there 3" and a body widing kit 3" i didnt buy them yet on friday im gonna buy them off someone i just want to know if there safe and if that body widing kit is safe to put on can they take jumps just dont want to waste my time and money on buying them if i cant jump
 
my bud had +2 on each side spacers on back and after a lap of hard jumps the axle bent

front spacers are fine i think as i have them and my friend also..we do all sorts of sh*t and there fine
 
Ive had +3 spacers on the rear for half a year and they have held up great. I do some jumping but nothing more than a 10 foot length. I have those $60 swingarm extenders and even those have held up to the little jumps that I do. I dont know that I would try anything over a 10 foot length jump with these parts....Ill save that for the KTM.