I dont think it will hurt anything at all and I read a mag. where they did this for the KTM. When you turn each slider moves the SAME amount as the other slider because your fork tubes are connected together by the triple clamps and can only go up and down, one side doesnt go down farther than the other. So you shouldn't notice a difference when turning either direction.
I've been told both by suspension experts and local shops with experience that mixing springs is no biggy. Also recommended that the stiffer spring go on the brake side, as it sees more stress, or something to that nature.
I liked fmx novice's answer.:silly: That's why I've been hitting all those trees on the left side or was that the right side.:eek: ------- That one .42 spring helped my ktm 200 so much I've just got to try two. I know that is way heavier than what is reccomended for 145# skinny old men . I'll give a report after a couple of test rides on the little chopper.