Spark plug oil?

Is these oil?

Looks more like rich carburation.
Is the engine consuming oil? How many mpg do you get when ridding?

Nessism wrote: Looks more like rich carburation.
Is the engine consuming oil? How many mpg do you get when ridding?

Thank you.

Its a friend of mine, will ask him.

He says he need to replace spark plug all the time because the sylinder 2 stop firinc because of these.

Could be oil fouling from a faulty valve guide seal.
The usual symptom is the plug fouling when the bike has been stood overnight which allows enough time for oil to seep into the cylinder.
Once a fresh or cleaned plug is fitted and the bike started the oil in the cyl is burned off and is usually ok for the rest of the day until left to stand again.
Smoke from the exhaust on acceleration after deceleration (which creates a momentary partial vacuum in the cylinder and draws oil down the guide and then burns it ) would back this up.

zed1015 wrote: Could be oil fouling from a faulty valve guide seal.
The usual symptom is the plug fouling when the bike has been stood overnight which allows enough time for oil to seep into the cylinder.
Once a fresh or cleaned plug is fitted and the bike started the oil in the cyl is burned off and is usually ok for the rest of the day until left to stand again.
Smoke from the exhaust on acceleration after deceleration (which creates a momentary partial vacuum in the cylinder and draws oil down the guide and then burns it ) would back this up.

These is exatct symtoms he has experience!

He have not control over the oil consumtion...

He plan todo a compression test to compare the cylinders, if the are close to identical his planis to replace the valve seal...