Just changed mine, read somewhere (may have been a post on here), dismantle the clutch assembly, screw the clutch to a work bench or similar. I tried with long nose plies but it was hard work, far easier to use a piece of string to stretch the springs. Once you've got it screwed down tight, put the string through the hook end of the spring so you can wrap the string around your hands a few times to get a good grip, simply pull on the string to stretch the spring sufficiently to either remove or re-fit, really easy to remove and re-fit springs this way, you can get much more leverage than you can with pliers.
or search for all the other threads the same as this.. you will NEVER get blue/red springs in a 125 clutch, bearly get greens in there... strip the clutch, put the springs on the shoe's... put the shoes bit by bit on the pins wiht grips.. only way really.. 50's you can lever them on, but FUCK all that noncing about.. can get hardcore ring opening plires that make the job eaasy peasy but the easier it is the more likely you are to bend the springs.
i use brake spring pliers to put mine in (you can get cheaper 1's) http://buy1.snapon.com/catalog/item...&group_ID=1676&store=snapon-store&dir=catalog but becarful hurts like fuck when you trap your fingers inbetween the levers and wear goggles, oh an with these you can get blue springs in without dismantling clutch
considdering the blues are THICKER than the holes in the clutch i doubt this verry much.. you physically have to REAM the spring into place... unless your talking 50 clutches... at bare minimum the powdercote gets scrapped off the 125 springs befor they even go in the hole
dont get me wrong it wasnt easy to get them in a little encouragment with hammer was needed but it was done i promise only for me to change back to green springs cause the blues are a bit of a twat on the road
so you recomend mangeling a spring in with a hammer? these hit 40,000rpm..... probably bent your backplate while fitting them this way aswell as the springs themselves.