:bash: i have a 1997 storm 800 this sled runs mint starts first pull every time i was working on a friends sled he had a compression tester so for the fun of it it tested mine it only had 120 psi per piston i called my local dealer they told me it should have 140 my question is why does it run mint start mint what should i do also the sled only has 2000 miles please help the season is right around the corner

Originally posted by INDY STORM@Dec 12 2004, 10:06 PM
:bash: i have a 1997 storm 800* this sled runs mint starts first pull every time i was working on a friends sled he had a compression tester so for the fun of it it tested mine it only had 120 psi per piston i called my local dealer they told me it should have 140 my question is why does it run mint start mint* what should i do also the sled only has 2000 miles* please help the season is right around the corner
374505


Just wondering if the test was valid.
The engine needs to be warmed up for at least 5 minutes, all plugs removed, and the throttle held wide open to achieve max compression, and about 3 fast pulls on the rope. Tester may not be accurate either.
On another note. If it runs good... don't worry about numbers. Enjoy. :wink:

no it wasn't even started before i tested it but i did hold the throttle open my tester directions said to pull it till the needal no longer climbed i ride close to my house but this year we have two rides 5 hours away and im a worry wort i should have not tested

Ride it. 120 cold is fine - as long as they were all within a couple pounds of each other.

just add a few drops of oil to the cylinder and retest, to see what ideal compression should be. mike