How much compression should a Polaris Sportsman 500 have?
The overall compression should be between 210 and 250 psi per cylinder.
How much compression should an ATV have?
An ATV will run with low compression so long as the engine’s compression is at a minimum of 100 PSI. Depending on the engine, most ATVs have a compression ranging between 100 and 250, while others could go up to 300 PSI. However, an ATV whose compression falls below 100 PSI will not run well.
How much compression should a Polaris 250 trailblazer have?
that compression reading you have is very low. your atv needs at least 120 psi to properly combust the air fuel mixture.
How much compression should a 4 stroke ATV have?
Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes should be around 110-130 PSI.
What should the compression be on a Polaris?
I was looking thru my service manual last weekend and found that the stock compression, while doing a compression check, should be in the 95-100psi range. sounds like yours is in the ball park.
What does low compression mean on an ATV?
Low compression is a warning sign that other issues may be happening with your ATV’s engine. A lack of performance in an ATV can be caused by a number of issues, and a compression test can be an important step in diagnosing problems in your engine. Here’s how to do a compression test on a Polaris Sportsman 850 XP.
Why does my Polaris bike not run well?
The bike hasn’t been running right the last couple of times I’ve taken it out. It idles fine, but as you start to give it gas, it falls on its face and backfires too. Once you get to higher rpms it runs well again. Does that indicate a rich condition in the mid range? How much of that could be due to the compression?
How much compression should I have on my sportsman 500?
How much compression should i have? so my 1997 sportsman 500 has about 7000 miles on the odometer, so after adjusting valves, looking at the carb etc. we did a compression test for the hell of it. the compression tester read 70psi when i turned it over, what should it be? Over 100.
How much compression should I have on my Polaris ATV?
It needs to be cranked good and fast with the throttle wide open to get an accurate reading. Then pour about a table spoon of oil in the plug hole and try it to see what you get. I believe 60 is the minimum on a cool 4 stroke,w/ throttle held wide open,less than that and you start having issues. You have good compression.
Are there any problems with the Polaris engine?
The engine itself is more or less bulletproof. Camshaft, and magnets coming off the flywheel are basically the only engine related problems. Search this forum for camshaft issues. Last year or ealy spring someone posted a pic of a bad camshaft and you can see what the cam looks like when scored.