have both tried both my opinion the only difference i find is clutch engagement the pink engages more like stock spring but both pull hard through rpms even though my bikes modified for stock bike i think pink is best but with mods i dont think it matters one of biggest difference i found was to change camshafts

 

I changes would I expect to see with my KFX with the pink spring ?
1. About how much does it raise the engaugement point ?
2. Does it encrease the RPM at which the clutch the shifts out ?

 

pink spring engages about same rpm as stock spring if more not enough to really notice and yes shifts out at high rpm like red spring revs out good i think