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I NEED HELP
- cant get my sled running right
started by polarisripper28
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October 30th 2009 at 1:12 PM
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polarisripper28
Average Member
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777 Posts 
Group: Members
Member Since: February 28th 2007
Location: Ashby, MA, USA
Current Sled: 1996 Ultra SKS
2008-2009 Miles: 800
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it runs crappy throughout the whole range of power(low mid high) i cant get it tuned right. somebody havea any tips. its a 1996 ultra sks. the reason y it runs so bad is cuz last year i set it up for tripple pipes and i took it all back to stock so i didnt blow up my only sled. and it hasnt run right since. any tips? is tuning a sled a science or trial and error. what clip should the needle be on. i have the stock jets in. can i tune it w/o the air box on. how much would it cost for a shop to tune it.
1996 polaris ultra sks
*sweet red shock springs
*sweeter red vents
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Site Supporter
Group: Site Supporters
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October 30th 2009 at 1:15 PM
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tdgbigfoot
Certified sledaholic
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1277 Posts 
Group: Members
Member Since: September 12th 2008
Location: Albany, Vermont, USA
Current Sled: 99 SKS 700, 96 Mach Z 780
2008-2009 Miles: 500
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ALl i know is that your problem seems like it is baout jetting, because there would be a big difference with the pipes.
2000 Indy Trail Touring 550, 1999 Indy SKS 700, 1996 Mach Z 780, 1994 Wildcat 700, 1991 Formula Plus, 1990 Safari LX, 1989 Indy 400, 1988 Tundra Skandic, 1987 Citation, 1986 Indy Trail 488, 198? Bravo
1969 Corvette 350
2000 Cheroekee - 4 1/2" lift, & other goodies
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October 30th 2009 at 1:17 PM
[ Modified October 30th 2009 at 1:18 PM
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polarisripper28
Average Member
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777 Posts
Group: Members
Member Since: February 28th 2007
Location: Ashby, MA, USA
Current Sled: 1996 Ultra SKS
2008-2009 Miles: 800
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i changed my jets back to stock
everything on it is original. i just cant get it tuned. and im not sure what clip the needle should be on so i put it on the middle one. it bogs when i start then runs bad up to like 6000rpm
1996 polaris ultra sks
*sweet red shock springs
*sweeter red vents
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October 30th 2009 at 1:28 PM
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tdgbigfoot
Certified sledaholic
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1277 Posts
Group: Members
Member Since: September 12th 2008
Location: Albany, Vermont, USA
Current Sled: 99 SKS 700, 96 Mach Z 780
2008-2009 Miles: 500
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I dont have any experience from jetting.
Must be some sort of fuel issue, obviously, so maybe..... Fuel pump? carbs?
2000 Indy Trail Touring 550, 1999 Indy SKS 700, 1996 Mach Z 780, 1994 Wildcat 700, 1991 Formula Plus, 1990 Safari LX, 1989 Indy 400, 1988 Tundra Skandic, 1987 Citation, 1986 Indy Trail 488, 198? Bravo
1969 Corvette 350
2000 Cheroekee - 4 1/2" lift, & other goodies
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October 30th 2009 at 1:42 PM
[ Modified October 30th 2009 at 1:53 PM
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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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go to this thread http://www.snowmobilefanatics.com/forum/...splay.aspx and grab the polaris 96-98 manual, and look in the carburation section.. It will give you all the stock settings. BTW, the ultra's don't blow up because of the triple pipes, you could have left them on.
95 - Storm 800 - Modded - AKA: FrankenStorm - Totalled near 100mph at Tug Hill!
96 - XLT/SP with Storm 800 trip/trip and now EFI - FrankenStorm II lives...
95 - RXL -- Sale Pending --
05 - Edge 800 long track - Stayin' stock for now..
---------------------------------------------
It made me more compassionate, more empathetic, more nurturing...
I FEEL LIKE I'M TRAPPED IN MY OWN WORST NIGHTMARE!!!
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October 30th 2009 at 2:24 PM
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DoubleClutch
New Member
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91 Posts 
Group: Members
Member Since: October 11th 2009
Location: Alantic, Pa, USA
Current Sled: 97 Polaris Ultra 700
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Engines don't blow up because of the pipes. They blow up cause of wear - how it's ran and fuel being lean or lak of oil. Having trip pipes on will make a engine proform better.
When I Die I Will Be Going Threw The Pearly Gate's Backwords And On Fire And Yelling Where's The Women!!!
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October 30th 2009 at 2:29 PM
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Empire087
Dude wheres the snow?
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236 Posts 
Group: Members
Member Since: July 19th 2009
Location: Sault Ste Marie, Michigan
Current Sled: 2002 ZL 500
2008-2009 Miles: 475
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You might have bad fuel in it, check your plugs, simple stuff.
02 ZL 500(apv)
91 jag afs 440
"if it snowed in the summer, I'd ride!"
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October 30th 2009 at 4:43 PM
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polarisripper28
Average Member
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777 Posts
Group: Members
Member Since: February 28th 2007
Location: Ashby, MA, USA
Current Sled: 1996 Ultra SKS
2008-2009 Miles: 800
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did both. i KNOW its the carburator tuning. i need help with tuning it.
1996 polaris ultra sks
*sweet red shock springs
*sweeter red vents
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October 30th 2009 at 5:35 PM
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di_99_2.7
Junior Member
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140 Posts
Group: Members
Member Since: January 2nd 2009
Location: RACINE, WISCONSIN, USA
Current Sled: 96 POLARIS XCR 600 SP
2008-2009 Miles: 205
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were was the stock pipe stored at? could it of had a new resident to make a home inside the pipe?
96 POLARIS INDY 600 XCR SP
W/PLASTIC SKIS W/8" CARBIDES FROM AN 06 FUSION, BELLY BUSTER 54 WEIGHTS, 21 TOP GEAR, PRIMARY & SECONDARY BLACK SPRINGS
COMING SOON: 39 BOTTOM GEAR "NEED TO FIND THE RIGHT CHAIN FIRST"
OVER THE SUMMER "2010" ITS GETTING BORED .30 OVER, SLP PIPES, 144 LONG TRACK CONVERSION.......=)
96 POLARIS INDY TRAIL BORED .20 OVER, AAEN PIPE, PURPLE SPRING.
91 ARCTIC CAT PROWLER CONVERTED TO A 550 L/C WITH RED/WHITE PRIMARY SPRING
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October 30th 2009 at 6:02 PM
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barney
Junior Member
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205 Posts
Group: Members
Member Since: November 23rd 2008
Current Sled: 2004 Arctic Cat F7
2008-2009 Miles: 2153
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Do you know if it is running rich or lean? And maybe you should try syncronizing the carbs.
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October 30th 2009 at 7:30 PM
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polarisripper28
Average Member
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777 Posts
Group: Members
Member Since: February 28th 2007
Location: Ashby, MA, USA
Current Sled: 1996 Ultra SKS
2008-2009 Miles: 800
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ya how do u sinc carbs the right way. i just stuck my finger in there and was like it feels about right.
1996 polaris ultra sks
*sweet red shock springs
*sweeter red vents
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October 30th 2009 at 11:09 PM
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XLT96rider
Other sports play once a week, but this sport is with us every day.
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942 Posts
Group: Members
Member Since: January 7th 2009
Location: Wausau, Wisconsin, USA
Current Sled: 1996 Polaris XLT Special
2008-2009 Miles: 1000+
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Quote originally posted by polarisripper28
ya how do u sinc carbs the right way. i just stuck my finger in there and was like it feels about right.
To sync:
Leave the key out!! (So somebody doesn't try to start it on you.)
Insert the roundslides, snug the top retainer that the cable goes to. Do not install them on the motor yet.
Operate throttle to wide open and make sure slides are opening all the way. Just enough that the slide isn't seen in the venturi when looking straight through. (Also make sure the slides move smoothly)
Put a zip-tie on the throttle to hold the slides open approx. 3/8-7/16" (on the engine side).
Using GOOD drill bits, find one that just rubs between the bottom of the venturi and the slide (again on the engine side)(You may have to adjust zip-tie to get a perfect fit)
Adjust the other to match by using the adjuster on the top of the carb.(Make sure you aren't pulling on the cables or it will be off)
Make sure slides open and close all the way again and are still smooth.
Take zip-tie off. - Very important!!!
Mount carbs.
The rest is done on the air box side of the carbs.
Again, using drill bits,
Adjust slides so both are at the same height at idle position.(Adjust using idle speed screws on the side of the carbs.)
You may have to adjust the idle again after you start it. (At idle position, there should be just a very small opening through the carbs. Better to start off low then over-rev and have clutch engage and run through wall.
Your idle mixture screw on the side of the carb---start at 1 1/2 turns out from seated.
If you get a bog when snapping the throttle, start turning in the idle screws 1/8 turn at a time until it clears. Ir you are under 1 turn out, you need to get a size larger pilot jets. (1/2 turn for flatslides)
As you adjust your idle mixture screws, the rpm's will go up or down. Re-adjust idle speeds.
Adjust to get smooth idle quality.
Make sure when you are adjusting the idle speed, you turn both screws exactly the same or the sync will be off.
Have patience, as it may take a while and you may have to re-do it a couple of times to get it perfect.
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October 30th 2009 at 11:42 PM
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Jeremy78
Starting Member
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17 Posts
Group: Members
Member Since: October 28th 2009
Location: Gresham, Wisconsin, USA
Current Sled: 2000 Arctic Cat zr 600
2008-2009 Miles: 2,000
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might be water in the gas. Clean everything! carbs, gas tank etc. if that don't work, your jetting must be wrong.
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October 31st 2009 at 9:06 AM
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Luke
Snowmofile
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903 Posts
Group: Members
Member Since: November 27th 2005
Location: Rotterdam, NY, USA
Current Sled: 1998 XC 700
2008-2009 Miles: 410
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If it ran good with the pipes on it, just put them back on.
Who tuned it for the pipes. Is it possible they changed more then just the main jets? Maybe they messed with the pilots or needle/needle jets.
1998 XC 700
SLP pipe, boost bottle, power packs, VForce, clutched, Ripsaw 1.25, M-10 susp, 2 in riser, handlebar hooks, third testicle, and good brakes.
"I have not failed, I've just found 10,000 ways that won't work." - Thomas Alva Edison
Amsoil dealer
http://www.galushascottages.com
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October 31st 2009 at 3:12 PM
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polarisripper28
Average Member
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777 Posts
Group: Members
Member Since: February 28th 2007
Location: Ashby, MA, USA
Current Sled: 1996 Ultra SKS
2008-2009 Miles: 800
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i did everything. ive changed everything back to original. gas is good. pipe is clean. carbs are spotless.
1996 polaris ultra sks
*sweet red shock springs
*sweeter red vents
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October 31st 2009 at 3:42 PM
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ultrawillie
sledhead
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170 Posts
Group: Members
Member Since: February 24th 2009
Location: virginia, mn
Current Sled: 96 polaris ultra
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Quote originally posted by XLT96rider
Quote originally posted by polarisripper28
ya how do u sinc carbs the right way. i just stuck my finger in there and was like it feels about right.
To sync:
Leave the key out!! (So somebody doesn't try to start it on you.)
Insert the roundslides, snug the top retainer that the cable goes to. Do not install them on the motor yet.
Operate throttle to wide open and make sure slides are opening all the way. Just enough that the slide isn't seen in the venturi when looking straight through. (Also make sure the slides move smoothly)
Put a zip-tie on the throttle to hold the slides open approx. 3/8-7/16" (on the engine side).
Using GOOD drill bits, find one that just rubs between the bottom of the venturi and the slide (again on the engine side)(You may have to adjust zip-tie to get a perfect fit)
Adjust the other to match by using the adjuster on the top of the carb.(Make sure you aren't pulling on the cables or it will be off)
Make sure slides open and close all the way again and are still smooth.
Take zip-tie off. - Very important!!!
Mount carbs.
The rest is done on the air box side of the carbs.
Again, using drill bits,
Adjust slides so both are at the same height at idle position.(Adjust using idle speed screws on the side of the carbs.)
You may have to adjust the idle again after you start it. (At idle position, there should be just a very small opening through the carbs. Better to start off low then over-rev and have clutch engage and run through wall.
Your idle mixture screw on the side of the carb---start at 1 1/2 turns out from seated.
If you get a bog when snapping the throttle, start turning in the idle screws 1/8 turn at a time until it clears. Ir you are under 1 turn out, you need to get a size larger pilot jets. (1/2 turn for flatslides)
As you adjust your idle mixture screws, the rpm's will go up or down. Re-adjust idle speeds.
Adjust to get smooth idle quality.
Make sure when you are adjusting the idle speed, you turn both screws exactly the same or the sync will be off.
Have patience, as it may take a while and you may have to re-do it a couple of times to get it perfect.
Great step by step,drill bit is the best feeler gauge made that every one has.If a guy doesn't want to pull carbs I've used the make up mirror off the passenger side vizzer of an old car I had.It just seemed easier to see all 3 carbs move.With the air box off the mirror will rest against the steering rod.
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October 31st 2009 at 4:07 PM
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barney
Junior Member
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205 Posts
Group: Members
Member Since: November 23rd 2008
Current Sled: 2004 Arctic Cat F7
2008-2009 Miles: 2153
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Yep I use a mirror to sync my carbs.
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October 31st 2009 at 5:47 PM
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bushwacker
Junior Member
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347 Posts
Group: Members
Member Since: January 2nd 2008
Location: Deer River, Mn, USA
Current Sled: 2000 XC 700 SP
2008-2009 Miles: 600
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Get rid of all the old gas. The new gas won't store for more than a few months. Put in premium fuel and run it. Also, check color of plugs.
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November 1st 2009 at 5:03 PM
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plowking
Starting Member
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41 Posts
Group: Members
Member Since: January 12th 2005
Location: nottingham, n.h., USA
Current Sled: 06 Rage,03 Edge
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Another thing to check is your clutches,if they aren't shifting properly on takeoff, you'll get a bog. plowking
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