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01-07-2013, 07:13 AM
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#1
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Junior Member
Join Date: Dec 2005
Primary Sled: '94 xlt sp
Where I sled: lake simcoe area
Posts: 11
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11100 mile (17863km) club - 94 xlt
That's allot of miles!
I'd like an opinion about what to do with the motor... Compression is 100, 100, 98. Should I throw some new rings in or pistons and rings? I'd like to keep the cost down as I want a new sled next year...
And, should I replace the head gasket with a new one?
Thanks for the opinions!!
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01-07-2013, 10:36 AM
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#2
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Member
Join Date: Feb 2008
Location: Kaslo
Primary Sled: 2001 RMK 800 153 track, new engine with 0 miles!
Where I sled: Kootenays
Posts: 70
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i had one with that many miles, the bottom end went
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01-07-2013, 03:12 PM
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#3
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Senior Member
Join Date: Mar 2003
Location: Upstate, New York
Mileage: less than 200 (bad winter)
Primary Sled: '01 XCR800 / '06 Fusion 600
Where I sled: Upstate NY
Posts: 318
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With that many miles - a nice complete rebuild would be the way to go. Crank seals, pistons and rings. (as long as the crank / cylinder are in a good shape) You should have trouble-free running machine for the year - WL
__________________
'06 Polaris Fusion 600HO
'05 Polaris Sportsman 400 4x4
'01 Polaris XCR-800 (VF2, clutched and cut heads)
'00 Polaris XCR800 (VF2, dynoport pipes, HTG billetheads, clutched)
'99 Polaris XCR800 (shimkit with stock pipes)
'98 XC700 (reprogrammed CDI, powerpak, boost bottle, clutched - 824 version)
'98 XC700 (clutched, VF - 220 version)
'95 XCR600 (PSI heads, pipes and clutched)
'94 Indy Trail
'89 Indy 500 (PSI single pipes - clutched)
'89 Indy Sport
'88 Indy 400 (owned twice)
'88 Indy Sprint
'88 Indy Sport
'78 Polaris TX440
(and many more)
Last edited by White Lightning; 01-07-2013 at 03:14 PM.
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01-07-2013, 03:15 PM
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#4
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Senior Member
Join Date: Nov 2002
Location: Oregon
Mileage: 0 miles
Primary Sled: 07 Dragon RMK 700 EFI
Where I sled: Oregon
Posts: 775
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Pistons and rings, at least. The potential for piston skirt failure is high with that many miles. Definitely replace the head gasket any time the head is removed. It's cheap insurance. Most gaskets don't work the second go around, even if they look fine.
__________________
2007 RMK 700, 2008 RMK 600, 2006 RMK 600, 1990 Indy 650, 1995 AC Prowler 2-up
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01-08-2013, 02:13 AM
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#5
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Junior Member
Join Date: Nov 2012
Location: Northwest Wisconsin
Primary Sled: Polaris Rush
Posts: 4
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Yep, probably due for rebuild. Definitely got your moneys worth out of that motor. Personally haven't seen many with that many miles.
Sent from my Desire HD using Snowmobile.com App
Last edited by polaristech; 01-08-2013 at 02:16 AM.
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01-16-2013, 05:11 AM
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#6
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Junior Member
Join Date: Dec 2005
Primary Sled: '94 xlt sp
Where I sled: lake simcoe area
Posts: 11
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Thanks guys. I'll put new pistons and rings in.
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02-01-2013, 01:19 AM
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#7
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Senior Member
Join Date: Mar 2008
Location: Alaska - 63North, 162West
Mileage: More than the knees can take!
Primary Sled: Arctic Cat T570
Where I sled: Bering Sea coast
Posts: 471
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As long as you have it open, I'd do a crank inspection and, assuming the journals and inside bearings are good, replace the seals, for sure, and outer bearings as needed.
Many times these engines can wear the journals that enclose the outer bearing race. You can make some remedies work, but too much play means replacement time. I intended to re-ring (and piston) my old '97 488 fan when it was around 10,000. I ended up putting it off until it was up to over 13,000. The cylinders were still within wear spec so I didn't oversize, and the pistons showed nothing to indicate stress so I kept them. I ran that engine to over 25,000 before it spit the rings. One piston was beginning to show skirt cracking - but hadn't dropped anything yet. The other piston was still intact in the skirts. Polaris really dropped good fans when they quit those old 340s, 440s, and 488s.
__________________
Formerly known as 63November, and before that as Golsovia.
Riding since 1983.
-Scorpion Whip
-Ski-Doo Skandic
-Yamaha Enticer LTs
-Polaris Trails
Current:
-97/98 Polaris Trail RMK hybrid with over 40,000 combined miles
-99 Arctic Cat 550 Panther 14,000+ miles
-01 Polaris SuperSport 5 rebuilds
-340 eBay Edge from AK, and 10+ other states
-'11 AC T570 brand new...1700 miles
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