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How Do These Pistons Look?
- Just tore open the head to see.
started by ClassicCat76
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September 9th 2009 at 9:48 PM
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will_5
A.T.A.C.
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752 Posts 
Group: Members
Member Since: May 20th 2008
Location: Northwest Alaska, USA
Current Sled: 2003 F7
2008-2009 Miles: 1000
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Get one, or pull the cylinders off for a visual inspection. Looks like you are running just a little rich. If you want tip top performance out of your sled for the whole season, install two new piston kits..money pending of course. If you don't have the funds you'll be alright. 
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Site Supporter
Group: Site Supporters
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September 14th 2009 at 11:40 AM
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Offshore24
Dismember
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4604 Posts 
Group: Moderators
Member Since: November 30th 2002
Location: NOYDB, Confusion, Azerbaijan
Current Sled: 05' Gade
2008-2009 Miles: 2999
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There's no substitute for a compression tester, other than replacing the rings, pistons, and bearings. See if you can borrow a compression tester? Given that you took the head off already, I'd say a compression test is second to swapping in some new parts.
2005 Ski-Doo MXZ Renegade 600 SDI
Save your breath, you'll need it to blow up your date.
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September 19th 2009 at 8:12 PM
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cat-sass
Average Member
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581 Posts
Group: Members
Member Since: January 15th 2005
Location: Gladstone, MI, USA
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Quote originally posted by TriumphoverU
My Opinion on this...do NOT lean out your jetting. Being a fan or free air cooled engine, running a little rich will help keep combustion temps down and aid in keeping the motor cool. If you were running a liquid cooled engine I'd agree with everyone else, but since you're not, I would leave the jetting alone.
I was waiting for someone to mention this.
As long as you aren't fouling out plugs
by the boxfull, I wouldn't re-jet.
If you're not
livin on the edge,
Then you're
takin' up space!
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September 19th 2009 at 10:46 PM
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sledfreak139
Sled Junky
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368 Posts 
Group: Members
Member Since: March 12th 2009
Location: Derry, NH, USA
Current Sled: 05 Polaris Switchback 600
2008-2009 Miles: 400
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Quote originally posted by Offshore24
Don't use brake cleaner on clutches. They are aluminum and they ar porous. You will dissolve contaminants into the pore of the aluminum. Hot soapy water then scrotchbrite pad.
I'm suprised nobody mentioned checking the cylinder walls for wear or micing the pistons for wear. "How do my pistons look?" I guess the real question that's been asked and answered was 'How does my jetting look based on the carbon on top of my pistons?" Did you check compression before you popped the top?
You got it! As i was reading it i was thinking the same thing lol
Quote originally posted by ClassicCat76
I don't have a compression tester. What would you recommend?
buy one, $25 at auto zone. it's a great tool to have.
2005 Polaris Switchback 600: SlyDog PowderHound Ski's, SLP Air Box Mod, V-Force 3 Reeds, 144" track fully studded, Powermadd Pivot Riser and 4" block, Polaris Hand guards,
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September 22nd 2009 at 6:15 PM
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ClassicCat76
Vintage Sledhead
ClassicCat76 Sled day!
Updated Yesterday at 2:35 PM
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1392 Posts 
Group: Members
Member Since: June 2nd 2008
Location: Jordan, Minnesota, USA
Current Sled: '76 Arctic Cat Pantera
2008-2009 Miles: 450
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Whats the best way to tae off the gaskets? Do I need to smooth the deck?
'76 Pantera 5000 F/C Conversion
MODS to come! Newer sled first!
Dad's Sled: '94 580 EXT dropped two teeth
Old doesn't necessarily mean slow!!
Do what you can with what you got.
Give a man a fish he eats for a day, teach a man to fish he eats for a lifetime.
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September 30th 2009 at 8:43 PM
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ClassicCat76
Vintage Sledhead
ClassicCat76 Sled day!
Updated Yesterday at 2:35 PM
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1392 Posts
Group: Members
Member Since: June 2nd 2008
Location: Jordan, Minnesota, USA
Current Sled: '76 Arctic Cat Pantera
2008-2009 Miles: 450
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?
'76 Pantera 5000 F/C Conversion
MODS to come! Newer sled first!
Dad's Sled: '94 580 EXT dropped two teeth
Old doesn't necessarily mean slow!!
Do what you can with what you got.
Give a man a fish he eats for a day, teach a man to fish he eats for a lifetime.
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