The pipe rub is not big deal. I would like the newer shock just because I think it would allow the main jet to be changed without removing the carb. Anyway, here is my high tech fix
I see you have a RaceTech spring. I was on the site and it instructed me to call for proper application, in this instance, instead of listing whats available. I suppose I'll do that if I can't get proper function. Bill did say spring rates are good for a 140lb individual(on the bike). I'll see. I think dealers like doctors will give answers greatly considering what there liability maybe in case of complications. ie: cut requiring stiches across several fingers near palm, dr says I will have considerable weakness in it, not at all. Broke leg, dr says I"ll walk with limp, yeah right! Dealer says suspension not suitable for weight of individual, that person crashes, dealer gets to talk to lawyers. We'll see, although 125's are marketed toward younger riders. Disclaimer, I would never sue because I happened to bail on a dirtbike.