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Discussion Starter #1
Hello everyone I have a 2002 Honda rancher which runs great but but now I have noticed that there is some white smoke coming from the exhaust pipe when I accelerate to higher speeds any ideas on this. Also when I slow down or sitting at idle there is no smoke. Any help on this will be greatly appreciated thanks
 

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White smoke is motor oil burning. Your Rancher has a dry-sump oiling system with an internal oil tank that requires a unique procedure for checking the oil level.

So first step, check the oil level as the manual instructs to verify that the motor is not overfilled with oil. Briefly it goes like this: Start the motor and allow it to idle for 5 minutes. Do not blip the throttle just let it idle for 5 full minutes. Then turn the ignition off and wait for one full minute after the motor stops. Remove the dipstick on the right side of the motor, wipe the oil off of it and poke it back in until it bottoms (do not thread the dipstick in) and read the oil level on the dipstick.

If the oil level is above the top indicator line on the dipstick, drain it and refill to the proper level.

Also remove the air cleaner lid (under the seat) and look for signs of oil wetting or pooling in the bottom of the airbox. Clean or replace the foam air filter element if it is dirty. Let us know what you learn from these steps.
 

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If its not oil level then it is possible your oil scraper ring in your set of rings is bad or your valve guide seals may be bad. Check compression to see if its rings. If not then it will probably be valve guide seals.
 

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well maybe I am wrong here, but IMO< oil burning is more a blue ish smoke
WHITE< tends to be coolant burning off >
BUT I doubt this atv is a liquid cooled motor, so that rules out the coolant side of things LOL
so, then next for WHITE smoke, to me is water!
do you ride in deep water often?
if so, maybe water is pooling up in your exhaust! and then burning off when riding and hot! and lots of throttle just blows the water out closer to tail end and you see it burning off?

your spark plug will tell you if your burning oil, as well, a lower level on your dip stick, so, good to check both of them and see what there telling you!

IF atv was ever sunk, that opens a whole other reason your motor is smoking
 

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Discussion Starter #5
Ok guys just a quick update. I did check the oil level and it was fine. I also checked the air box for oil and I didn't find any oil spillage. I did find that the air filter was a little crunchy so I replaced with a new one I had. I haven't done a compression test yet. I'm going to get to that today hopefully.
 
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