Do it yourself shock rebuilding

Most of the fox are at 5" down from the edge of rim.
5.25", 4.98" on so on.
On big shocks like those, small change doesn't make much different.
I call Fox dist in Canada (H2R dist.) and with the shock #, I get the IFP depth.

You have to hunt around fox website but they have alot of info for DYI rebuilding. Have done my Mountain bike shocks but not snomo.

http://service.foxracingshox.com/powersports/index.htm



IFP Depths - ARCTIC CAT


Ski Front Track Rear Track
Part Number Part Number Part Number Year / Model IFP Depth IFP Depth IFP Depth 1995 ZR 440 0603-627 N/A N/A
1.360" N/A N/A 1995 ZR 580 N/A N/A 0604-768
N/A N/A 0.765" 1995 ZR 700 0603-560 N/A 0604-768
0.730" N/A 0.765" 1995 ZRT 600/800 0603-560 N/A 0604-768
0.730" N/A 0.765" 1997 ZR 580 N/A N/A 1604-164
N/A N/A 0.720" 1997 ZRT 600 N/A N/A 1604-164
N/A N/A 0.720" 1997 ZRT 800 N/A N/A 1604-164
N/A N/A 0.720" 1998 ZR 440 Sno-Pro N/A N/A 1604-399
N/A N/A 0.720" 1998 ZR 500/ZR 600 (2nd Run) N/A N/A 1604-382
N/A N/A 0.720" 1998 ZR 500/ZR 600 (January) 0603-904 N/A 1604-164
0.950" N/A 0.720" 1998 ZR 600 EFI LE 1603-027 N/A 1604-382
0.950" N/A 0.720" 1998 ZR 600 EFI CC N/A N/A 1604-382
N/A N/A 0.720" 1998 ZRT 600/ZRT 800 1603-027 N/A 1604-382
0.950" N/A 0.720" 1998 Thundercat/Thundercat MC 1603-176 N/A 1604-382
0.800" N/A 0.720" 1998 Powder Special 1603-176 N/A 1604-382
0.800" N/A 0.720" 1998 Powder Special EFI LE 1603-027 N/A 1604-382
0.950" N/A 0.720" 1999 Z 440 Sno-Pro N/A N/A 1604-485
N/A N/A 1.360" 1999 ZR 440 Sno-Pro N/A N/A 1604-485
N/A N/A 1.360" 1999 ZR 500/500 EFI 1603-027 N/A N/A ZR 600/600 EFI 0.950" N/A N/A 1999 ZR 700 1603-027 N/A N/A
0.950" N/A N/A 1999 ZRT 600 1603-027 N/A N/A
0.950" N/A N/A 1999 ZRT 800 1603-027 N/A N/A
0.950" N/A N/A 1999 Powder Special 600 EFI/LE 1603-027 N/A N/A Powder Special 700/LE 0.950" N/A N/A 2002 Z Sno-Pro 1703-030/031 0704-744 0704-749
2.000" 2.800" N/A 2002 ZR Sno-Pro 1703-040/041 0704-744 0704-749
2.000" 2.800" N/A 2003 Z Sno-Pro 1703-282/283 0704-911 0704-910
2.000" 2.800" N/A 2003 ZR Sno-Pro L/C 1703-260/261 0704-960 0704-959
2.000" 2.800" N/A 2003 Firecat 500 Sno-Pro 1703-208/209 0704-930 0704-932 Firecat 700 EFI Sno-Pro 2.000" 2.000" 2.000" 2004 Sno-Pro L/C 1703-538/539 1704-188 1704-189
2.000" 2.800" N/A 2004 Firecat Sno-Pro 1703-484/485 1704-140 1704-141
2.000" 2.000" 5.700" 2005 Sno-Pro L/C 1703-790/791 1704-349 1704-350
2.000" 2.800" N/A 2005 M6/M7 1703-783 1704-318 1704-321
1.250" 0.650" 0.900" 2005 M7 LE 1703-716 1704-318 1704-322
6.680" 0.650" 0.900" 2005 Kingcat 1703-494 N/A N/A
5.940" N/A N/A 2005 Firecat Sno-Pro 1703-684 1704-308 1704-362
6.790" 0.621" 5.700"

Been DIY rebuilding since '93. Might get flamed for this, but don't need to be overly worried about exact IFP depths.
Couple things a person can do, all have worked well for me over the years.

1- you can see where the IFP has been riding in the bore before you clean it up.... and sometimes after you have cleaned it.

2- If you can, measure the depth (from fill valve end always) before you disturb it. Sometimes this won't work if the shock is trashed and has a bunch of nitrogen in the oil.

3- Upon assembly, have the nut on piston rod on about half a turn and shove the IFP down the bore with the piston rod and screw bearing cap all the way down (I like to take the oring off the bearing cap to do this). Depending upon if shock has a bump-stop on the rod, try it both ways to find it's happy place.

All you are trying to do is make sure piston doesn't get personal with the IFP.

Proly other tricks out there but in most cases, one or more of these tricks have never let me down.

.02

shock'n

4z is right on the money. The floating piston depth is not ultra critical. Fact is its another shock variable you can mess with to get better ride. the more room for gas you have in the shock the softer the ride , if you don;t have gas room as your rod is shoved into the body the floating piston can bottom in the shock and or the nitrogen being compressed hits big pressure and acts to lock up the shock.