Ive been running the pink spring for about a year and I think it is a good all around spring. When you hit the throttle it engages right away. I do mostly trail riding with the occasional drag race. I think it is an excellent spring for someone that does alot of trail riding. Just my two cents worth.
Probably the biggest seller here as a general purpose spring and recommended.
Some of the pavement guys dragging say it delivers the best top end performance and yet tame manageable out the gate.
Oval track dirt track guys swears its a must.
Gncc proven favorite also.
Works well with all weights of these bikes and any type of cut on the clutch or setup.