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Not running like it should
- 99 500xcsp not getting peak performance
started by 1999polaris700xcsp
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October 24th 2009 at 7:52 PM
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1999polaris700xcsp
New Member
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66 Posts 
Group: Members
Member Since: January 25th 2009
Current Sled: 1999 polaris 700 xcsp
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Ok last season was my first time out on my sleds and I noticed that my 500 was pretty much a terd. It has a little over 5000 miles on it and I checked the compression. When I checked it it came out to 90 in one and 95 in the other but I did not know I had to let it warm up first so it probably not accurate. The plugs are oil soaked, it has trouble getting over 70mph and every once in a while it will take off and run much better but for only a minute or two then back to terd status. Most of my riding was when it was warm out.
My question is does this sound lke bad compression, two rich, two warm, carbs need cleaning, any ideas would be much appreciated.
Also should my 99 500xcsp be faster than a 2004 ski doo 500 two trail sled? They are close but the doo passes me up by a smidge.
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October 24th 2009 at 8:06 PM
[ Modified October 24th 2009 at 8:14 PM
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xcr440
Sundowners Trail Coordinator
xcr440 icefish's because having feeling in your fingertips is overrated.
Updated Over an hour ago
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12582 Posts 
Group: Members
Member Since: February 1st 2003
Location: St.Germain/Edgerton, Wisconsin, USA
Current Sled: 03prox700/97xcr440
2008-2009 Miles: 610
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Isn't the doo a 600 with lower porting and smaller carbs????
Edit:
With comp that low you atleast need to rering it. Clutch springs may need to be refreshened also.
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2003 Pro x 700 almond/blue,10-66 black/red team 719 T-flow, 440 mains
1997 xcr440 my clutch kit, 380 mains,T-flow
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October 24th 2009 at 8:13 PM
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feebles
Junior Member
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163 Posts 
Group: Members
Member Since: January 2nd 2007
Location: butternut, wisconsin, USA
Current Sled: 1979 yamaha exciter
2008-2009 Miles: like 10
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that is still low compression it should only change a little bit between warm and cold
'93 buick... 1000w 15" pyle,
1600 watt pyle amp,
rockford fosgate ported box, 2 8" jensen mids.
pioneer cd player
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October 24th 2009 at 8:18 PM
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1999polaris700xcsp
New Member
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66 Posts
Group: Members
Member Since: January 25th 2009
Current Sled: 1999 polaris 700 xcsp
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I am not for sure that the year is correct but he did tell me that the doo was a 500.
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October 24th 2009 at 10:16 PM
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CRASHSKIDOO
Starting Member
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27 Posts
Group: Members
Member Since: April 28th 2009
Location: SouthWindsor, CT, USA
Current Sled: 2004 MXZX 600
2008-2009 Miles: 350
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Is your 700 an early or late year? I had similar problem with my 2000 600 xcsp and it turned out to be a bad throttle position sensor which is next to carbs. Unplug the sensor and it runs great. The dealership told me this sled did not have this TPS but it actually does and it shares it with the Arctic Cats of similar years.I still have a MBRP can for your sled if you want a little more performance and Im selling it cheap.
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October 25th 2009 at 12:27 PM
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1999polaris700xcsp
New Member
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66 Posts
Group: Members
Member Since: January 25th 2009
Current Sled: 1999 polaris 700 xcsp
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Not sure if either of my sleds are early or late models.
Can I just do the rings on it or do I have to change the pistons? Do I need to hone the cylinders or should they be fine?
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October 25th 2009 at 12:33 PM
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jonny_little94
New Member
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61 Posts
Group: Members
Member Since: March 15th 2009
Location: I Falls, Minnesota, USA
Current Sled: 2000 mxzx 440
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just do the whole tune up. clean your carbs, check your compression again when its warm. and change out the spark plugs. if it still runs bad then you know its not one of those 3 things. (only if all three things were done right and your compression was good.)
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October 26th 2009 at 8:31 PM
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motorheaderr
Junior Member
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129 Posts
Group: Members
Member Since: April 16th 2009
Location: marinette, WI, USA
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i have a 2000 500 xc sp and it did the same thing took my ves off cleaned did a total carb clean job.. eliminated the air bix and put air filter on the back of carb instead and she ran like a champ.. just gotta do your maintenance
ITS TIME FOR SNO!!!!
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October 27th 2009 at 4:36 AM
[ Modified October 27th 2009 at 4:37 AM
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Ugly_old_Poo_kid
techno-bumpkin
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1079 Posts 
Group: Members
Member Since: March 18th 2007
Location: Walworth, NY, USA
Current Sled: 05 Edge & Frankenstorm II
2008-2009 Miles: 165
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When you check the compression, you need to hold the throttle wide open, are you doing that? Also, pull all the plugs and only have the compression tester in the holes.
If the plugs are black and wet, it's too rich, adjust your carbs. If they're oily/stucky, adjust the oil pump.
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---------------------------------------------
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October 29th 2009 at 10:14 AM
[ Modified October 29th 2009 at 10:16 AM
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ACEXLT
THREE FOR ALL
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5668 Posts
Group: Members
Member Since: September 17th 2002
Location: Greenfield, WI, USA
Current Sled: '01 XCR 800
2008-2009 Miles: 1326
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Being that you said it was warm out, it was running real rich. If you jet it for warm weather,you will be too lean when its cold. Took my Xcr 800 out on a 42 degree day last year on a lake. That didn't last long........ran like a dog and I am jetted down 2 steps from stock.
'01 XCR 800
'00 Indy Triumph
TRIPLES RULE!!
TWINS HAVE NO BALLS!!
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October 29th 2009 at 4:39 PM
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1999polaris700xcsp
New Member
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66 Posts
Group: Members
Member Since: January 25th 2009
Current Sled: 1999 polaris 700 xcsp
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I did not hold the throttle open or warm it up before checking. I didnt know how to check it properly but when I go home that is going to be one of the first things I do. I did you stable in the gas tanks of both sleds and ran them once over the summer but I am sure they need to have the carbs cleaned also. I think the 500 was not very well maintained just ridden. The carbides were worn completely out and the ski was being chewed up by the roads. The suspension was squeaky needed grease.
When I get home my plan is to take a quick ride on my 700 for about an hour then go home and rib the carbs off and clean them on both sleds. One at a time so I can put it back together properly though. lol I cant wait to get that ripsaw track i some deep powder out on the power lines.
I'm putting together a tool kit/emergency kit for my sled. A gerber, colapsable shovel, chem lights "glow sticks", my sure fire flashlight,duct tape, 550 cord and some rope that I can tow with. I hate to doit cause I dont want the weight but I know if I dont I will need some day.
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October 29th 2009 at 4:49 PM
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sledcrusher
Junior Member
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379 Posts
Group: Members
Member Since: August 10th 2009
Location: Maine, USA
Current Sled: 2003 Rev 600
2008-2009 Miles: 1400
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Buy new rings for your sled, and re-ring it. Clean your clutches, and make sure your airbox is free of dirt etc... If you have VES valves, CLEAN THEM!!! If you still have the bottom end as before, but no top end, then your valves are dirty. It takes 10 minutes to clean them, and is more than worth it.
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