Bought this skid from an e-bay deal thinking it was a 136 but now I am not so sure. Found some part numbers but they dont show up on any polaris list at my disposal. Found 5131231-06 stamped on the rails. It would help a ton if I knew what sled these rails were intended for.

Measuring from the center of the most foward shaft (that the front limiter straps attatch) to the leading edge of the rear bogie wheel tension adjusters it measures exactly 6.125" longer than my 121" skid out of a 2000 xcr 800. Doing some quick math it would take approximatly a 12.25" longer track to fit the skid therefore making this a 133.5" skid. Eh? End to end measurment of the skid is roughly 4'-7". This is actually fine with me as I shouldnt have to add a tunnel extension using this.

Anyone have a 133.5" extra 10 skid laying on the bench that can measure and compare? Id really hate to buy the wrong friggn track.


Regarding mounting the skid into the tunnel:
Preliminary measurements confirm everything from the foward rail tips to the front torque arm mounting are identical to the original 121" skid. Front torque arm dimensions identical in height, width, location etc. IE, this new skid is a direct fit on the front bolt holes in the tunnel with no modifications required. Thinking I can just add 6.125" of distance away from the original holes to compensate for the additional 6.125" of skid length. However, I still need to figure out the elevation of the rear holes to obtain the correct attack angle. Any thoughts?




As always, any help is greatly appreciated.

I think what you have there is an Xtra-10/136 from a GenII SKS/RMK. If so, you're correct on the front mounts, but the rear you'll have too far back the way you're thinking. Should be more like 2" or so to the rear of your original 121" susp. mounting point. To get it exact, measure the difference in the distance from where the front arm mounts to the rail to where the pivot arm mounts on the rear - 121 vs. 136.

For height, level the sled or set the rear bumper at it's original ride height. Make sure the front of the sled isn't squatting if your hanging the back of the sled. Then measure from the ground to the original hole in the tunnel. New hole should be at same height to guarantee no geometry changes anywhere.

Shit man i wish i would have seen this post before, I just got rid of my 133.5" skid and track, long gone now, i just installed it in a guys a sled..

If it is indeed a 133.5" the mounting holes, if you have brackets mounted on the sled for a 121" you move the brackets back, and it goes right to the side of the other bracket, i dono how to explain it, But here check these pics, it was 121 to 133 conversion, the front plates are for the 121 and the rear drop brackets went for the 133 i measured it off the sled the skid came from, im not even sure this is what you are asking but i thought i would let you know atleast.

Tomorrow, ill help you figure out how to mount the rear, it will depend on what holes your skid mounts to in the front, and if you use drop brackets in the rear. Ill measure tomorrow for you.

If its a 133 i can help you out lots with mounting it. Check the pics out and PM me if you want me to help you get the right mounting places.. There is a pic of the 133.5 skid i had, not that it really helps but ya..

As a side note, look that front arm over good. The top tube cracks often on Xtra10's.