2001 Sportsman 500 HO No start
#21
#23
Check compression,should be between 55-90 psi on average. May help to to pull the valve cover and check the valve clearance.Tight valves can cause fuel to spray back into the air box as well as needing a good carb kits also.Polaris Sportsman 500 Carburetor Repair Kit Fits 2001-2002 Carb: Shindy 03-408 One other thing to check is if the flywheel key may have sheared.Just remove the recoil cover and flywheel nut and you can see if it has or not.
#25
Yes sounds like combustion chamber may be flooded and fuel leaking out the exhaust. Again this can be carb related,valve related or possibly a sheared key. If you take a carb off rebuild it,don't just clean one.Plus a sheared key can cause problems like this by not being able to burn fuel correctly or at all if the key has sheared to where timing is way off.Just a process of elimination. Check the valves and compression then check the flywheel key. If these check out,you still have good spark,then head towards the carb.Hard carb to set float level right,but this may help on this BST40 carb.The BST-40 Bible | Adventure Rider
Polaris Sportsman 500 Carburetor Repair Kit Fits 2001-2002 Carb: Shindy 03-408 | eBay
Polaris Sportsman 500 Carburetor Repair Kit Fits 2001-2002 Carb: Shindy 03-408 | eBay
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#29
Hopefully you did replace the air filter. Still sounds like carb related especially if you don't have the float adjusted properly.Hard carb to get right.Here's how to adjuts one,plus you can use a clear tube on the carb drain bow nipple to see if fuel rises above the bowl.Also check the oil tank ad see if it's overfull or smells like gas. Change the oil and filter if needed.
#30