What is the advantage of a stronger spring ,does it make a difference,if so what can of difference??
Gauth I am no expert but after reading, I believe the different clutch springs allow the clutch to grab at different RPMs. Do you want the bike to rev up high and then grab and go or grab right away at low RPM's.
I think the adjustable clutches do something similar .
If you ride in on long straight roads with no stop and go, you may want one type of spring.
If you do a lot of city stop and go you want another type.
If you race you will want one type of spring also. You will most likely want to really rev that bike up then shoot off the starting line.
If you get a stiff spring that causes the bike to rev up a lot before engaging, and you drive stop and go in the city a lot, you will find your self having to keep revving up the bike just to get going.
I am not sure what springs or adjustable clutch setting are ideal for hills or what rpm's the stock springs are.
For popular clutch springs (there are exceptions) I believe
yellow=1000 rpm
blue=1500 rpm
red (racing)=2000 rpm
But this is my interpretation and please anyone correct me if Im wrong.