Needsome help with a question. - Compression on ext 580 started by polaris21
	August 9th 2009 at 3:14 PM Post #1
	polaris21 Have fun while you can, cuz lifes real!! 338 Posts Group: Members Member Since: August 30th 2006 Location: Dakota, IL Current Sled: sold the mxzx 440 2008-2009 Miles: 25+
	My friend has a ext 580 and he just rebuilt it and it only has 105 Compression. all our other sleds have 120 and we were just wondering if 105 is ok. Rating: 0 Quick Edit Edit Topic

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	August 9th 2009 at 9:43 PM Post #2
	700wildcat Official Heat Hater. 158 Posts Group: Members Member Since: January 2nd 2009 Location: Hazelton, North Dakota, USA Current Sled: '08 Arctic Cat M8 153" 2008-2009 Miles: 1100
	How many miles has he put on it since the rebuild? It could be that its not broke in yet. 2008 Arctic cat M8 153''Stock >current 1996 Arctic cat Wildcat 700 136x2x15 challenger finger track, 3'' riser, Powermadd mountain bar.sold 1980 Arctic cat Jag 3000. sold Dad's 2003 Arctic Cat Mountain cat 800 144''. 1999 Arctic Cat Powder Special 500. sold 2000 Polaris Indy 550 Trail. Rating: 0 Quick Edit Full Edit

	August 10th 2009 at 5:01 PM Post #3
	theword Junior Member 134 Posts Group: Members Member Since: December 8th 2007 Location: Spring Lake Park, MN, USA Current Sled: 1996 Polaris Ultra SKS 2008-2009 Miles: 425
	well you can tell if the issue is rings by adding oil to the cylinders and then do the compression test. The other thing that it could be is the compression tester. Try your tester on another motor that you know that is good. Rating: 0 Quick Edit Full Edit

	August 11th 2009 at 10:53 PM Post #4
	TeamNFG Advanced Member 1458 Posts Group: Members Member Since: February 22nd 2006 Location: SomeSno, Ab., Canada
	What was done to be "rebuilt"? 105 psi for a rebuilt engine is NOT good period! If you are getting 120 on other sleds with the same tester then rebuild is not good, answer the first question and we will go from there Fix it till its broke! Rating: 0 Quick Edit Full Edit