just make sure you use a proper spring tuning site like to dial in the suspension....600 is way too much for that bike....email me your weight...i can tell you exactly what spring you need//i assume it has an rc4 on it or dhx 5.0
haven't gotten to ride it ride it, but just pedaling it around its Wayyyyy stiffer, need a 600lb spring as well but that will be here this week, the 400 in there just isn't cutting it