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XC longtrack help
started by polarissnowX921
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May 10th 2009 at 2:20 PM
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polarissnowX921
Starting Member
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27 Posts
Group: Members
Member Since: November 5th 2007
Location: Oak Creek
Current Sled: 99 500XCSP
2008-2009 Miles: 0
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I have a 99 XC 500 SP that I want to make into a long track. I can get a rear skid (136") from a ski-doo (2002 Renegade MXZ). How much work would it take to get this skid and the ski-doo track to work on my machine?
Is there any other advice anyone can give me about this conversion?
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Site Supporter
Group: Site Supporters
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May 10th 2009 at 2:29 PM
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ferntfernt
Average Member
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693 Posts 
Group: Members
Member Since: October 23rd 2005
Location: minnesota, USA
Current Sled: 1983 cross country 600
2008-2009 Miles: not enough
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just buy the long track conversion kit from TracksUSA.
1971 Puma big mouth single
1976 MERC ICE TWISTER, 340, piped
1975 KITTY CAT
1983 CROSS COUNTRY, 660 triple
1998 XC700 RMK, piped, clutched
1998 XCF440
may not able to fix stupid, but you can modify it.
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May 10th 2009 at 2:32 PM
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Xx08BRAAAPPP22xX
Loving the pro-x!!!
Xx08BRAAAPPP22xX nights are getting nice and cold but now it's got to stay like that through out the whole day on into December!
Updated Tuesday at 4:59 PM
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6669 Posts 
Group: Members
Member Since: January 20th 2005
Location: Taberg, New York, USA
Current Sled: 04 Pro-X 600
2008-2009 Miles: 1,960
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I agree it's a lot easier and better than swapping another skid in just because it's a 136.
Polaris Pro-X=Sledgehammer, and every bit as tough as one!
NATIONAL WEATHER SERVICE...Getting it wrong since 1870
"There might be a foot of ice but there is 400ft of water, let me take my helmet off so I can swim." -ACM
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May 10th 2009 at 3:03 PM
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polarissnowX921
Starting Member
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27 Posts
Group: Members
Member Since: November 5th 2007
Location: Oak Creek
Current Sled: 99 500XCSP
2008-2009 Miles: 0
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I think I'd like to buy a new rear skid. The one I have on now is almost shot, although I think it is just the springs. The sled doesn't come back up after I sit on it. Any ideas?
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May 10th 2009 at 7:12 PM
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westman995
Advanced Member
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1927 Posts 
Group: Members
Member Since: February 22nd 2008
Location: St. James, Minnesota, USA
Current Sled: 98 rmk 600 - zx mod
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Quote originally posted by polarissnowX921
I think I'd like to buy a new rear skid. The one I have on now is almost shot, although I think it is just the springs. The sled doesn't come back up after I sit on it. Any ideas?
Shocks are prolly due for rebuild or replaced. Springs may be worn out too. If thats all it is, im sure new shocks or springs will bring it back to life.
Unless something is sticking holding it down, like not being greased or something. More then likely what i said above tho.
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May 11th 2009 at 12:35 PM
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old_school
Junior Member
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145 Posts 
Group: Members
Member Since: December 25th 2008
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If the width is right on the ski-doo skid mounting locations, it shouldn't be any more difficult to install than an edge suspension. The tough part would be determining where to locate the mounting plates. Unless you can get the ski-doo skid for really cheap or for free, I would look for a 136 xtra 10, xtra lite, or edge skid if I were you instead of using the ski-doo skid. I've seen some 136 x-10s go for great deals on ebay in the last couple months, and I saw a 136 x-lite go for around $150 plus shipping (I got great deals on both a 144 x-lite and a 144 edge).
I would say that the probability is 95% that the problem you're describing with your skid is one (or more) of the pivot points on a torque arm binding up from not being greased often enough. Once it gets that bad, it's probably beyond the point of just greasing it to solve the problem. At that point it probably needs to be taken apart, clean the corrosion and gunk, and then reassembled and greased.
Quote originally posted by Xx08BRAAAPPP22xX
I agree it's a lot easier and better than swapping another skid in just because it's a 136.
Rail extensions might be easier than swapping skids (but not by much IMO), but better? Maybe I have a vision problem because I just can't see how a short track skid extended out to 136 could possibly be "better" at anything than a 136 skid. The geometry/dynamics are completely different. They put the torque arms farther apart on longer rail skids for a reason.
Just my 2¢
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May 11th 2009 at 6:51 PM
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polarissnowX921
Starting Member
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27 Posts
Group: Members
Member Since: November 5th 2007
Location: Oak Creek
Current Sled: 99 500XCSP
2008-2009 Miles: 0
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Last summer or the year before I had the shocks rebuilt, and it made no difference. I know I need to put in heavier springs because I am a bigger guy (6'5" 240) and I like to jump and ditch bang with it. At the same time, I pulled it all apart and cleaned /regreased. All of this had no effect
In August of this year I am moving up to Houghton, MI. I need a new track anyways, and have always wanted one longer. Can anyone give me advice on whether I should go 136" or 144"? What are the pros/cons? I think I would like to get a skid off of a two up because it will be longer as well as stronger, right? But then I'd probably have to go 144"...
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May 11th 2009 at 7:28 PM
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dtmmil
Senior Member
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3182 Posts
Group: Members
Member Since: January 27th 2007
Location: Hawley, MN, USA
Current Sled: 99 xc700
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This is my 99 xc700 with a 144 kit from tracksusa. I used there rail extensions, the tip up ones, got a used 144" track and a custom built tunnel extension. In my opinion I think the 144 works very well with the tip up extensions, I would absolutely do it again.
Clutched
Jetted, boyesen reed petals, boost bottle, 98xc carbs slides, 1371 needles, gutted air box
Homeade 7 1/2" riser
Homeade suspension drop brackets
shortened and blackened windshield
powermadd handguards
144 conversion, tracks usa extensions, custom tunnel extension and rear bumper, IQ flap, 1.25" track
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May 11th 2009 at 10:06 PM
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polarissnowX921
Starting Member
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27 Posts
Group: Members
Member Since: November 5th 2007
Location: Oak Creek
Current Sled: 99 500XCSP
2008-2009 Miles: 0
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did you re-do clutching/gearing or anything like that? I defiantly like the way that looks, good job
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May 11th 2009 at 10:15 PM
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dtmmil
Senior Member
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3182 Posts
Group: Members
Member Since: January 27th 2007
Location: Hawley, MN, USA
Current Sled: 99 xc700
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I am running the same clutching as I had in before, not the stock setup. And I am going to be messing with the gearing, more of an RMK setup, I don't need to go over 100 anyway. It pulls good now though, so I wouldn't need to do any gearing.
Clutched
Jetted, boyesen reed petals, boost bottle, 98xc carbs slides, 1371 needles, gutted air box
Homeade 7 1/2" riser
Homeade suspension drop brackets
shortened and blackened windshield
powermadd handguards
144 conversion, tracks usa extensions, custom tunnel extension and rear bumper, IQ flap, 1.25" track
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May 12th 2009 at 10:27 PM
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polarissnowX921
Starting Member
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27 Posts
Group: Members
Member Since: November 5th 2007
Location: Oak Creek
Current Sled: 99 500XCSP
2008-2009 Miles: 0
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I found a rear skid from a 98 700 polaris. Not sure exactly which model, but I would guess a two up machine. It is a 144" skid. He is asking $100. Is there anything I should be looking for? How can I test it? Will my stock fox shocks that I have on my sled right now directly fit onto it? Would it even be worth it?
Also, do I need to re-clutch, or could I get away with only re-gearing?
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May 12th 2009 at 10:49 PM
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dtmmil
Senior Member
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3182 Posts
Group: Members
Member Since: January 27th 2007
Location: Hawley, MN, USA
Current Sled: 99 xc700
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I don't believe the 144 will bolt right in, you will have to move mounting points in your tunnel. I would suggest clutching it first, then gearing, like I said, on mine gearing wasn't necessary, but it was an improvement in low end. I don't need to go over 100mph anyway, I would rather it pull to there faster though, which it does when I can get traction.
Clutched
Jetted, boyesen reed petals, boost bottle, 98xc carbs slides, 1371 needles, gutted air box
Homeade 7 1/2" riser
Homeade suspension drop brackets
shortened and blackened windshield
powermadd handguards
144 conversion, tracks usa extensions, custom tunnel extension and rear bumper, IQ flap, 1.25" track
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May 13th 2009 at 11:49 AM
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old_school
Junior Member
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145 Posts
Group: Members
Member Since: December 25th 2008
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Quote originally posted by polarissnowX921
I found a rear skid from a 98 700 polaris. Not sure exactly which model, but I would guess a two up machine. It is a 144" skid. He is asking $100. Is there anything I should be looking for? How can I test it? Will my stock fox shocks that I have on my sled right now directly fit onto it? Would it even be worth it?
Also, do I need to re-clutch, or could I get away with only re-gearing?
Pushing a 144 track with a 500, I would think that you will need to gear down some. Stock gearing for a 99 500 XC SP (with a 121 track) is 22/40 or 22/41. Stock gearing for a 99 500 RMK with a 133 x 1.25 track is 17/41. Gearing also depends a lot on the type of riding you're going to be doing and the weight of the track you're going to be spinning (longer paddles make the track heavier). 144 is a lot of track to turn with a 500 IMO.
What suspension is that 98 144 skid? I didn't know Polaris made a 144 skid before they came out with the xtra lite in 99 or 2000. Was there a 144 version of the xtra 10?
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May 13th 2009 at 2:03 PM
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polarissnowX921
Starting Member
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27 Posts
Group: Members
Member Since: November 5th 2007
Location: Oak Creek
Current Sled: 99 500XCSP
2008-2009 Miles: 0
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I'm not sure on the exact model of the sled. They did make a 144" before 99. Now that I think about it, my dad has at least 1 2up on our trailer right now that is 144".
I know it is not going to bolt right up. I'll re drill holes and such to make it work.
I am going to do deep powder riding. I would like to do at least a 1.5 inch lug. Would I be better off getting a 136" with a 2" lug?
I really don't care if my top speed is 60mph. I'd just like to get up and moving fast. What kind of mods will I have to do to my clutch? What gearing would be recommended?
I will also be looking into a 700 engine, but I'm going to hold off on that for now. Please don't suggest buy a new sled. I know that option is out there, but it really isn't what I'm looking to do
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May 13th 2009 at 5:21 PM
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dtmmil
Senior Member
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3182 Posts
Group: Members
Member Since: January 27th 2007
Location: Hawley, MN, USA
Current Sled: 99 xc700
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I would say that its up to you if you go 136 or 144, and look at the 500 rmk gearing and get close to that if you can, should be no problem.
Clutched
Jetted, boyesen reed petals, boost bottle, 98xc carbs slides, 1371 needles, gutted air box
Homeade 7 1/2" riser
Homeade suspension drop brackets
shortened and blackened windshield
powermadd handguards
144 conversion, tracks usa extensions, custom tunnel extension and rear bumper, IQ flap, 1.25" track
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May 13th 2009 at 6:41 PM
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old_school
Junior Member
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145 Posts
Group: Members
Member Since: December 25th 2008
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Is that 98 144 skid a 8" suspension or an xtra 10? Does it have straight rails or are they up-tipped in the back? I'd bet it's a lot heavier than a xtra lite or edge suspension. If it's a fully coupled skid, I'd think you wouldn't be real happy with it in deep powder. Personally, I would look for a xtra lite skid from a 2000 or 2001 RMK, or possibly an edge RMK skid. It really comes down to personal preference though.
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May 14th 2009 at 1:34 AM
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polarissnowX921
Starting Member
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27 Posts
Group: Members
Member Since: November 5th 2007
Location: Oak Creek
Current Sled: 99 500XCSP
2008-2009 Miles: 0
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My most recent plan is to get a 99 Polaris 500 RMK clutch, skid (136), and gears. I will also be buying a new 136x15x1.5-2.0. Any recomendations on lug hight? I will be doing about 50/50 on/off trail riding, 99 percent of which will be up in Houghton, MI. Any locals care to give their opinion?
Does anybody know how different the RMK clutch is from my XCSP? Do I need only the primary, or both?
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May 14th 2009 at 8:18 AM
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dtmmil
Senior Member
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3182 Posts
Group: Members
Member Since: January 27th 2007
Location: Hawley, MN, USA
Current Sled: 99 xc700
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If you plan to do that much trails I would go with the 1.5" instead of the 2", many people say that the 2" will be fine, but some say they will break the lugs off, or fold them over, the shorter track will be more trail friendly, and it will still be a much more noticeable difference off trail. I went with a 144" by 1.25 and it was a huge improvement over stock! You also don't need to buy the entire clutch from the rmk, just the internals, the primary spring, weights to keep you in the correct rpm range, secondary spring and good helix. I wouldn't necessarily stick with stock clutching from a 500 rmk either, ask what works for others with a similar combination that you plan to go with and buy the parts separately, ebay or here are both very good places to get stuff like that.
Clutched
Jetted, boyesen reed petals, boost bottle, 98xc carbs slides, 1371 needles, gutted air box
Homeade 7 1/2" riser
Homeade suspension drop brackets
shortened and blackened windshield
powermadd handguards
144 conversion, tracks usa extensions, custom tunnel extension and rear bumper, IQ flap, 1.25" track
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May 14th 2009 at 11:57 AM
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old_school
Junior Member
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145 Posts
Group: Members
Member Since: December 25th 2008
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I plan on riding about 60% off trail next year, and I've pretty much decided on the 1.75 challenger track (also considering the 1.5 crossover). I have to use 8 tooth drivers to run a 1.75 track, and I think I'd need 7 tooth drivers to run 2 inch paddles.
I think the biggest problem with running taller paddles on packed trails is that your hyfaxes might run dry and overheat because they don't get enough snow on them. I've read that using ice scratchers on packed trails helps a lot with that problem, so I'll be adding those this summer as well.
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