Drive clutch springs

[m8snowman69]

I would like to change the primary clutch spring so that the it engages between 2500 & 3000 RPM's. My current spring is yellow/white, which engages around 4500 RPM's. Can someone tell me what the clutch spring options are for a 2007 M8 162" track and at what RPM they engage?

 

[sledsrock]

Might get more involvement/help on your question if you repost in a specific sled category and not the new members intro area.