Sent an email to MB1 this morning about getting the correct springs for my weight, (2011 kx250f) as well as several other companies to try and get an idea of where to start on getting it setup for my weight with my stock valving (for now). Not sure how much I can trust the racetech calculator (did send them a direct email with some questions though). I was emailed back by Mike Battista from MB1 (owner?) and he suggested 5.4 for rear spring and .46 for front spring. In my first email I specifically noted my weight, ability, what riding I do, and make and model of my bike. When I responded I specifically stated I had the sff fork and the .46 couldn't be correct. He told me it didn't matter that the forks only had one spring, that's what I needed, and made me feel like I was an idiot for thinking otherwise. Emails were very unprofessional and he "lol"'ed at my lack of knowledge about MY suspension. The last email I sent him was asking where a spring that light for my fork could be found, since I believe .80 is the lightest made? I am by no means a suspension expert, but I understand the basic idea behind how everything works, and I understand somewhat how spring rates work. The 5.4 he recommended for the rear is nowhere close as stock is 5.2 and I can't get a decent sag number from it. Racetech's calculator called for a 4.8 I believe. (I'm 160-165 geared up). Is he just having an off day, or did he just feed me a bunch of bull for no reason? I have no faith in dealing with someone who has no will to help, or lack of knowledge. Is this standard practice for him? I have read some good reviews on here about him, and I was surprised to be treated this way by a reputable company. Also if anyone has any recommendations for spring rates that will get me closer into the ballpark of where I need to be for an intermediate mx rider weighing in about 160 on a 2011 kx250f feel free to post it up lol.