Please read this very carefully, the problem and the solutions have several variations.
First, this new problem with tunnel protector installation, only applies to some MY08 and MY09 Polaris 121" and Switchback sleds with 'RAW' style tunnels, which have two full length cooling extrusions running the length of the tunnel. These cooler extrusions have an upside down T-rail as part of them, and the Tunnel Protectors are installed onto this T-rail, similar to how you install hifax on the sliderail.
If you don't have this type of tunnel, this post doesn't apply to you.If you or your dealer doesn't have some fabricating skills, don't attempt this either.
For MY09 2 stroke sleds, the front bulkhead heat exchanger was made smaller. It no longer will reliably stop the tunnel protectors from getting pushed forward and past the heat exchanger and down in front of the track. This is a bad thing, but it only occurs with: MY09 2 stroke sleds.
The Polaris part numbers that were intended to be used for tunnel protection on the RAW tunnel sleds are now all superceding to part 2877687 which at this time is not available until Dec. 16, 2008 or later.
Take a look at:
Nov 08 Inner/Outer studding Wear Strip 2877687 instructions and then print them out.
Basically follow the instructions on the sheet from Polaris, after reviewing these fabrication additons. My additions basically replace step 4 of the Polaris instructions. You will need the dart clips and rivets to put the closeoff and taillight together after installing these tunnel protectors. You will also need some nuts and bolts.
I will now break this into several sections:
1. Tunnel Protector LengthGet 2 pieces of THICK hifax (5521632 or 55216333), same as factory usage on your sliderails. You will have one end cut at a 90 degree angle, and the other cut at a 45 degree angle. This will face against your tailflap, remember it will be channel up when you install it, so angle appropriately.
If you have a 121" sled, cut the piece to 52" overall length
For a 136" Switchback, cut the piece to 62" overall length, (61" will be okay, if you have short hifax)
2. Stopping the Tunnel ProtectorIf you DON'T have a MY09 2 stroke, skip to Section 3.
If you Do have a MY09 2 stroke, or you just want to, use a grade 5 button head torx drive 1/4-20 that is 1 1/2 to 1 3/4" long. Drill a hole crossways 3 inches in from the angled end of the tunnel protector/hifax. This bolt will be a stop in the mounting channel, so that when you install the tunnel protector the crossways bolt will hit the back end of the T-rail in the heat exchanger, and prevent the tunnel protector from going further forward. This is shown in the instructions. Use a mechanical/crimped flanged 1/4-20 locknut on this bolt, to keep it from falling out. Don't install the tunnel protector yet.
3. IF studding on the Outside bands of the trackAs the instructions show, you will have to make the protector thicker at the tail end, to provide extra height. The instructions show the two bolts that make a sandwich of another piece of hifax below the long pieces you have already prepared.
You will have to fabricate a 'ripped lengthwise' section of tunnel protector (IQ Switchback Thick sliderail hyfax 5521632/ 5521633) to stack underneath the tunnel protector you already have. Black grade 5 Button head torx drive 1/4-20 1" long bolts are used with mechanical (not Nylok) locking flanged nuts to hold the stack together. They will need to be recessed or setin to the hifax on both the top and bottom pieces somewhat.
Your goal should be a total stacked depth top to bottom a minimum of 1 1/8" thick, 21 1/4" or more total length. Thicker is okay.
END of fabrication instructions.
Please notice that you do not drill new holes in ANY METAL. You are only fabricating slide on tunnel protectors, that are retained by the tailflap.