Need Compression Info For ZL600 - I think My motor is blown started by thebaer237
	March 9th 2009 at 7:53 AM Post #1
	thebaer237 Starting Member 27 Posts Group: Members Member Since: September 29th 2008
	My 1999 ZL600 efi has 8500 miles on it iand i believe the motor is blown. It feels like i need crank bearings and top end work. One cylinder had 80psi and the other had 90psi and if i turn the crank it gets harder to rotate in some spots even with the plugs out. Does anyone know what it should have for compression? I was thinking atleast 125PSI Rating: 0 Quick Edit Edit Topic

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	March 9th 2009 at 10:22 AM Post #2
	bobp53916 Looking for Sno Pro motor mounts 890 Posts Group: Members Member Since: December 14th 2008 Location: Gwinner ND/Waupun WI Current Sled: 99 ZR600/2000 Sno Pro 2008-2009 Miles: 500+
	Quote originally posted by thebaer237 My 1999 ZL600 efi has 8500 miles on it iand i believe the motor is blown. It feels like i need crank bearings and top end work. One cylinder had 80psi and the other had 90psi and if i turn the crank it gets harder to rotate in some spots even with the plugs out. Does anyone know what it should have for compression? I was thinking atleast 125PSI Your compression is way too low...In my opinion, less than 110psi and I would be looking at rebuilding the top end. Rating: 0 Quick Edit Full Edit

	March 9th 2009 at 3:45 PM Post #3
	thebaer237 Starting Member 27 Posts Group: Members Member Since: September 29th 2008
	Quote originally posted by bobp53916 Quote originally posted by thebaer237 My 1999 ZL600 efi has 8500 miles on it iand i believe the motor is blown. It feels like i need crank bearings and top end work. One cylinder had 80psi and the other had 90psi and if i turn the crank it gets harder to rotate in some spots even with the plugs out. Does anyone know what it should have for compression? I was thinking atleast 125PSI Your compression is way too low...In my opinion, less than 110psi and I would be looking at rebuilding the top end. Ya thats what i figured. Ill just take it apart this spring and rebuild the whole motor. I think my crank bearings are part of the problem also so ill just inspect the whole motor. thanks, Rating: 0 Quick Edit Full Edit