Recently I rebuilt the trans in my 00 426 and as I tore it down I noticed it has an aftermarket clutch basket (vortex). As I removed the clutch basket I see that it has some springs in the base. My question is what are they there for? I have torn apart smaller two stroke motors and I never noticed springs in any of the other clutch baskets. Also when I lug the motor down I hear quite a bit of chatter which I am assuming is the chain, but the chain seems tight enough. Can anything else cause that noise, or is it normal?