Been reading a few different posts.
I am setting up an 136'' 700 04 xc, with mods.
Is 420719 still the proper helix # when ordering?
What is the spring number/tension??

I keep reading conflicting info..

I'd say that 719 is still the helix to use, over the 720 version. With the 136, the motor wont to be loaded too much. The 70/46/42 side is still pretty aggressive. I really like the red/black secondary spring...Think its 240-140. Clutch backshifts much better than using the red/blue 200-140. FWIW, I'll be running the 719 and red/black in my 136 Fuse 660.

Last season I ran the 719 in my 136" lightly moded 700. The red/blue spring is ok but it doesnt have a bang out of the corners like I wanted so I picked up a black/green and a black/red spring for testing. I think the black/green is what I will end up with , it shouldnt load the motor as hard on the steep angle and back shift harder. I am talking about Ti springs not steel , steel springs didnt have the same ratings .