KE-4 cylinder question

[PikefisherKent]

I'm concerned about what I'm seeing in this borescope pic of a cylinder in my 1951 Kiekhaefer 7.5hp KE-4. What is the jagged stuff in the picture? Carbon buildup?

 

[RCO]

Looks like carbon buildup in the exhaust ports to me. You have to remember these things were run for years burning 30 weight non detergent oil . It shouldn't cause a problem unless it is built up to the point of blocking the passages .

 

[PikefisherKent]

Thanks RCO. So it'd be ok if I poked around inside and knocked loose what I could?

Kent