[tonysmac10]

 

[boostenlebaron]

If you get them to cycle you may be able to see the edges enough to see if it's burned but bear in mind you can only see part of the sides so the burned side could be out of view.
What is your problem leading you to think it's burned?

 

[BillV]

Do a compression test.

 

[SparkyMJ]

The valves and intake as a whole looks nearly spotless to me compared to others I've seen on bikes that run fine. So based on the pic I'd be inclined to think there is nothing wrong here.

Inspect the spark plugs and +1 compression test if something is awry, but if the bike runs fine just leave it.

-Mike

 

[TwistedMister]

the valve edges will be burnt away, gone