Klx 110 started smoking grey smoke burning oil there is also oil on the end of the exhaust pipe. bike still runs good.

If the smoke from the exhaust pipe is either grey or bluish-tinged, it generally means that your engine is burning oil inside the combustion chamber. Burning oil could be due to a number of causes, from leaky valve seals to bad piston rings. take to reputable repair shop

Is the smoke white or black? If it's white head gasket black it oil .

IF you are running stock pipes (not "True Duals"), the right pipe exhaust ALL from the front cylinder, and SOME of the rear, and the left pipe only blows SOME of the rear alone.

The stock rear pipe splits, some going to the left pipe by itself, and the rest going to the right pipe WITH the exhaust from the front cylinder.

Now, white smoke usually indicates moisture.
Being a (non-VRod) Harley, that eliminates the liquid coolant, because there is none.

Next up that comes to mind is condensation.
BUT, this would burn off fairly quickly.

So is the white smoke only at first, or even when warmed up?
And if warmed up, is it actually coming OUT of the pipes, or OFF the pipes (like some oil burning)?

Is it condensation or actual smoke? White smoke is associated with diesel mixed in petrol and with quite strong smells. I suspect that it is condensation as water vapor is a by product of combustion and the motor/exhaust will have to warm up to clear it. Check for water droplets at the end of the exhaust to confirm condensation. Burning oil will cause a blueish smoke to emit from exhausts.

Blue'ish smoke is caused by burning oil. Sounds like you have hardened valve stem seals. When they get hard, they allow oil to seep into the cylinders while it sits over night. When you start the car it takes a little while to burn out the oil. In the early stages once you are running it will seal up OK, but as time goes by it will begin to seep even while you are running. Using full synthetic may help the smoke because the synthetic oil will not burn. You can also go 10,000 miles between changes. (Watch your oil level though since you will not be changing every 3000).

Hope this helps.

You are too lean. It is causing the engine to get too hot and allow blowby around the piston rings. You need a larger main jet. Hopefully there has not been too much damage to the internals.

Might be your miracle in a can fix burning causing the smoke. If its coming out of a joint where it clamps, try to tighten the clamp. Sometimes there is also an exhaust gasket where the one pipe slips into the other pipe that could be broke or missing.

IS THIS A 4 STROKE ENGINE? DID THE BIKE FALL OVER ON ITS SIDE FOR A LONG TIME? A PLUGED UP FILTER IN THE AIR FILTER BOX,OR A POSITIVE CRANKCASE VALVE PLUGGED UP? THE CRANKCASE VENTING,VAPORS NEED TO GO INTO THE AIR INTAKE AND BURNED IN THE COMBUSTION CHAMBER CYLINDER.

There are indeed traces of oil coming out of the exhaust. Blue smoke is burning oil. Grey or white smoke is usually coolant/water going through the engine. This can be caused by leaking head gaskets, valve guides depending on the engine, excessive blow-by, etc. Large amounts of oil are not good; and water is even worse. I would look at getting the head gasket replaced. The loss of power is because neither oil or water likes to burn, and once your engine clears it out, it probably runs ok for the rest of the day. Then I'm guessing the next morning, it comes back. This is an urgent fix, because prolonged leakage can damage the engine block, head, or both.

If it's liquid cooled, then that grey smoke is more than likely steam ( the head gasket is on it's way out). If it was burning oil, you would able to smell it.