EDIT: Brain fart.... these part numbers are the REAR Springs
So just because i've been thinking about this and had a theory, I had to put some numbers to it and found something interesting.
OME992 = WK MD = XK LD = 13.6" free height, 7.2 coils, 240 lbf/in, 17mm wire
OME993 = WK HD = XK MD = 13.6" free height, 6.6 coils, 280 lbf/in, 18mm wire
OME992 with 1 coil removed:
11.7" free height, 6.2 coils, 280 lbf/in <---Note that this is like running the OME993 spring rate and 2" less pre-load in the assembly
OME993 with 1 coil removed:
11.5" free height, 5.6 coils, 330 lbf/in
Based on this, I think I'm going to try an OME992 with 1/2 coil removed:
12.7" free height, 6.7 coils, 260 lbf/in <---- This will give a spring rate in between the OME HD/MD springs, and an inch less preload in the assembly. So it should ride good, and if needed I can always cut another half coil off.
Note that free heights are estimations due to the fact that the top side of the coil closed/ground. But their relative differences to each other should be maintained for comparison purposes.
But still need to know whether kmax/phunk used the OME992 or OME993 spring. I have a feeling, based on the "stiff ride" comment that they cut down an OME993 spring and ended up with a 330 spring rate.