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i got another new compression tester and this one didnt break in the prosess of testing
- i tested a couple of times just to make sure and i got around 82psi and 70psi
started by 87srvsnow
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November 30th 2008 at 2:31 PM
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87srvsnow
Average Member
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988 Posts 
Group: Members
Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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the 70psi is on the PTO side. im just wondering what you think this is. Rings, headgasket, or anything else? the reason im posting about this again is because first i used a push on compression tester and i was told those are not very accurate. then my next tester was a cheap one and broke while testing the PTO side. now i got a new one that i was told worked pretty good, so i got about 82psi and 70psi. sorry this is a lot to read.
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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Site Supporter
Group: Site Supporters
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November 30th 2008 at 2:43 PM
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blurdvision
Starting Member
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11 Posts
Group: Members
Member Since: November 22nd 2008
Location: Ontario, Canada
Current Sled: GT sno racer
2008-2009 Miles: 45
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I think you should make one topic and ask all of your questions in it, instead of making 5 topics a day ahahah
also that is very low compression does it even run on that?
'98 Polaris Ultra 680
-slp pipes
-144 studs
'77 Arctic Cat Jag 340
-clutched
-3" riser
-custom shorty seat
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November 30th 2008 at 2:47 PM
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2005 Fusion 900cfi
Dynoport Can
SLP Torque Arm
1" predator track
--------
Dads:
03' RX-1er
Custom Graphics
4th wheel + Custom wheel kit
--------
Moms:
2000 SXr 600 Sleeper ( 700 triple big bore with cut 600 heads )
Stock elsewise
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November 30th 2008 at 2:51 PM
[ Modified November 30th 2008 at 2:58 PM
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87srvsnow
Average Member
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988 Posts
Group: Members
Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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ya it runs supprisingly. runs pretty good i think. i know i do make a lot of threads. i just fugure differant stuff out at differant times and i dont have anything else to do when its raining so might as well spend time on fixing my sled
i have to take the heads off to check though right? and this isnt a problem that can wait until like spring?
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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November 30th 2008 at 2:59 PM
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blurdvision
Starting Member
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11 Posts
Group: Members
Member Since: November 22nd 2008
Location: Ontario, Canada
Current Sled: GT sno racer
2008-2009 Miles: 45
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Quote originally posted by 87srvsnow
ya it runs supprisingly. runs pretty good i think. i know i do make a lot of threads. i just fugure differant stuff out at differant times and i dont have anything else to do when its raining so might as well spend time on fixing my sled
ya thats cool are you sure the compression is that low it shouldnt run good or run at all if its that bad
'98 Polaris Ultra 680
-slp pipes
-144 studs
'77 Arctic Cat Jag 340
-clutched
-3" riser
-custom shorty seat
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November 30th 2008 at 3:02 PM
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TriumphoverU
The Sled Guru - Moderator
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2192 Posts 
Group: Moderators
Member Since: June 19th 2001
Location: Saint Johns, MI, USA
Current Sled: 2006 Polaris Fusion 700
2008-2009 Miles: 600
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did you hold the throttle wide open when you tested? and did you continue pulling the engine over until the reading stopped going higher?
Polaris is my way out - Other people just use a door.
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November 30th 2008 at 3:05 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 TriumphoverU
did you hold the throttle wide open when you tested? and did you continue pulling the engine over until the reading stopped going higher?
x2..
And i understand all the threads, except for this is atleast the second if not third one on the compression tester haha.. You could just put this in the other compression tester thread you made. But if its for another reason by all means start a new thread. 
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November 30th 2008 at 3:05 PM
[ Modified November 30th 2008 at 3:11 PM
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87srvsnow
Average Member
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988 Posts
Group: Members
Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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ya i have a thread on compression tester, i held the throttle wide open, and i pull it many times. should i take both plugs out at the same time? like when im testing one should i have the plug out on the other? and yes i do pull until the needle wont go any higher.
ok i dont really think that will change it either but i might as well go try.
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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November 30th 2008 at 3:06 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 87srvsnow
ya i have a thread on compression tester, i held the throttle wide open, and i pull it many times. should i take both plugs out at the same time? like when im testing one should i have the plug out on the other?
I dont think really that should matter, but i always take both plugs out at the same time..
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November 30th 2008 at 3:22 PM
[ Modified November 30th 2008 at 3:26 PM
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87srvsnow
Average Member
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988 Posts
Group: Members
Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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nope i checked with both plugs out and it didnt change at all.
and i just started it im pretty sure it runs fine.
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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November 30th 2008 at 5:25 PM
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440_jag
450 horse ditch bannger
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1488 Posts
Group: Members
Member Since: July 30th 2007
Location: Galesville, wisconsin, USA
Current Sled: 2002 zr 500 cce
2008-2009 Miles: 500
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well why dont you check to see if its the head gasket. start the engine and spray starting fluid on the head where the gasket is. if its runs faster you will need to get a new gasket. but it dosen't hurt to just go put in new rings anyways. there not very exspensive.
2002 Zr 500 CCE
D&D pipe ported polished y 6 inch riser Acerbis Handguards Chrome winshield Pro-glider Rack Rsi pad Ripped graphics Fox snow pro shocks clickers
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November 30th 2008 at 5:40 PM
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87srvsnow
Average Member
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988 Posts
Group: Members
Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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is it hard to put new rings in though?
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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November 30th 2008 at 6:44 PM
[ Modified November 30th 2008 at 6:45 PM
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Raptor700rBronson
Advanced Member
Raptor700rBronson gettin modern warfare 2 and fallout 3 tomorrow!!!
Updated Last Sunday at 7:20 PM
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1087 Posts
Group: Members
Member Since: February 28th 2008
Location: Ohio, NY, Cuba
Current Sled: 2002 ZR 500 Cross-Country
2008-2009 Miles: 708
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You need to have the right tools, torque wrench and a ring compresser is all, they are real easy.
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November 30th 2008 at 6:47 PM
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87srvsnow
Average Member
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988 Posts
Group: Members
Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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i have a torque wrench, but as ring compresser? never heardof it. ill have to look it up. im planning on getting a service manuel, so it wouldnt be to hard would it?
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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November 30th 2008 at 6:49 PM
[ Modified November 30th 2008 at 6:52 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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You dont need a ring compressor, ive done it a few times without that, ive never even seen what one looks like haha. Its not hard, just use your hands to squeeze the ring in the groove and push the cylinder on. Its not hard at all.
If you do end up doing this, replacing the rings. You want to put some 2 stroke oil on the pistons/rings before putting it back into the cylinder, to lube it up so it doenst scratch or anything, and so it goes on more smoothly. You will need a new base gasket and head gasket most likely, so be prepared for that, You previously stated before that you needed new exhaust y-pipe gaskets, or thought you did. I would just look for a top end gasket kit that should have all the stuff you need for it. Check ebay, i got both for my sleds on there from the same guy for a pretty decent price.
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November 30th 2008 at 6:59 PM
[ Modified November 30th 2008 at 7:00 PM
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87srvsnow
Average Member
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988 Posts
Group: Members
Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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this is something that i need to get done before riding it right? i have a neighbor who used to own a car shop so he would probibly be able to help me out, but is this a hard thing to do? i have never taken apart an engine before, but im planning on buying a manuel to help me out.
also thisis the right thing right?
http://www.harborfreight.com/cpi/ctaf/di...mber=97709
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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November 30th 2008 at 7:13 PM
[ Modified November 30th 2008 at 7:24 PM
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Raptor700rBronson
Advanced Member
Raptor700rBronson gettin modern warfare 2 and fallout 3 tomorrow!!!
Updated Last Sunday at 7:20 PM
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1087 Posts
Group: Members
Member Since: February 28th 2008
Location: Ohio, NY, Cuba
Current Sled: 2002 ZR 500 Cross-Country
2008-2009 Miles: 708
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Ive never used one outside boces so i dont know on sleds if you need one but i did a stihl demo saw rings by hand and it was not fun (i was 13 to so that didnt help)
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November 30th 2008 at 7:21 PM
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Quote originally posted by 87srvsnow
is it hard to put new rings in though?
putting new rings is easy as cleaning carb, or changing a clutch, or even changing a track. its just a matter of time and making sure all part is clean + taking some measurement. Also, be sure to torque to spec.
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November 30th 2008 at 7:30 PM
[ Modified November 30th 2008 at 7:33 PM
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87srvsnow
Average Member
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988 Posts
Group: Members
Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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well since ive never changed a clutch or a track haha. but i have cleaned a carb before and that wasnt hard at all.
uhh and a manuel says all the torque specs and everything so im definitly getting one of those.
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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November 30th 2008 at 9:04 PM
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crazyzrt600
Average Member
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674 Posts
Group: Members
Member Since: October 17th 2008
Location: st. johnsbury, vt, USA
2008-2009 Miles: 400
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ive done alot of motor jobs on sleds. its easy. just take your time and stick the bolts and nuts for everything were you can find them. its plobly simpler than the carbs bigger parts.
current sleds 1992 indy 400,1979 excel v,1973 tx340,1990 yamaha ovation 340
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November 30th 2008 at 9:06 PM
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mackinsaw
Born to Fertilize..
mackinsaw Thinks it's mighty convient for the neighbor to wait untill there's snow on the ground and to ask me if I would do him a massive favour and cut his firewood for the winter for money as he is incapable. Dang I got some work cut out for the next few days.
Updated Last Sunday at 9:30 PM
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2064 Posts 
Group: Members
Member Since: December 1st 2004
Location: Avola, B.C., Canada
Current Sled: garbage bag
2008-2009 Miles: 780
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I have never used a ring compressor because once you slide the cylinder on, you can't get the ring compressor off. I was also told to use non synthetic oil to lube the cylinders when you change the rings. You will also need a topend gasket kit. Search for topend rebuild in the how-to's and you will get everything and more you need to know..
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December 1st 2008 at 3:02 PM
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Raptor700rBronson
Advanced Member
Raptor700rBronson gettin modern warfare 2 and fallout 3 tomorrow!!!
Updated Last Sunday at 7:20 PM
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1087 Posts
Group: Members
Member Since: February 28th 2008
Location: Ohio, NY, Cuba
Current Sled: 2002 ZR 500 Cross-Country
2008-2009 Miles: 708
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Quote originally posted by mackinsaw
I have never used a ring compressor because once you slide the cylinder on, you can't get the ring compressor off. I was also told to use non synthetic oil to lube the cylinders when you change the rings. You will also need a topend gasket kit. Search for topend rebuild in the how-to's and you will get everything and more you need to know..
You obviously dont know how to use one.
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December 1st 2008 at 3:35 PM
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MaxTrax
Junior Member
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332 Posts 
Group: Members
Member Since: March 9th 2007
Location: Lowell, Michigan, USA
Current Sled: 1996 Polaris XCR 600
2008-2009 Miles: 325
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I've never used a ring compressor on a two-stroke. It just seems like too much of a hassle. +1 on oiling the parts when you reassemble.. it will kill your motor instantly if you don't and then start it. If you've cleaned a carb this will be just fine. There is nothing more rewarding than knowing that you can work on your own ride. Just keep your parts in order when you take it apart, old babyfood jars/ziplock bags work great for this.
1996 Polaris XCR - Triple SLP Pipes, Clutch Kit
*Try making fun of a purple and pink sled... see how far it gets you!*
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December 1st 2008 at 3:38 PM
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87srvsnow
Average Member
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988 Posts
Group: Members
Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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ok thanks, now i just need to make around $150 because i know that im goin to need new pistons too, just my luck.
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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December 1st 2008 at 9:56 PM
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BC_Dan
Advanced Member
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1739 Posts
Group: Members
Member Since: January 31st 2003
Location: USA
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Quote originally posted by Raptor700rBronson
Quote originally posted by mackinsaw
I have never used a ring compressor because once you slide the cylinder on, you can't get the ring compressor off. I was also told to use non synthetic oil to lube the cylinders when you change the rings. You will also need a topend gasket kit. Search for topend rebuild in the how-to's and you will get everything and more you need to know..
You obviously dont know how to use one.
The ring comprpesser that was pointed to on the thread was for a 4-stroke piston where there are multiple rings (usually 3) and the piston/connecting rod slides down into the cylinder to bolt onto the crank. In a 2-stroke, the piston/connecting rod is already attached to the crank via a ball bearing. You slide the cylinder ON to the piston in a 2-stroke, if you used the tool shown, you would NOT be able to take the tool off once the cylinder is on the piston.
There are compression tools that are specific for 2-strokes, that wasn't one of 'em.
I have never had a problem just using my fingers to install cylinders onto pistons, the rings aren't hard to compress and that gives you a chance to make sure the ends are on each side of the locating pin.
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