Gsx 1100 Gasket and surface Help

[akronos]

I'm about to reassemble the cylinders and the headboard, removing the old original Suzuki seals I noticed that they left like a paint (I think it's a sealant primer) on the surface between the planes(pictured you see silver). Should it all be removed completely? How can I do that?
 

[Gixer1460]

It's not critical - rocks, debris, bits of old gasket - remove. If you are OCD about stuff then some thinners or acetone should get it off but it won't hurt to leave it!

[Dezza]

If you want it gone a good way to target the thinners or acetone is to use a cotton-wool bud so you can get the sealant off without damaging the case paint. This also works for removing overspray after painting engine cases.

[akronos]

I tried with acetone and also with a specific product to remove paint, but it doesn't come off ...if I leave everything as it is, then I risk losing oil?

[Swiss Toni]

No you won't!!! It's just a mark! You can't feel it with your fingernail, can you? Just button it up, and worrying! It won't leak!

[akronos]

I noticed while I'm reassembling all an abnormal coloring inside the exhaust collectors , here's the photo. The valves and the game valves in the cylinder 4 were perfect , the carbation equal and adjusted for all four cylinders...

The exhaust valve in 4# cylinder are whiter than other,spark plug too. 

[Captain Chaos]

1 hour ago, akronos said:

the game valves 

i suppose you mean "valve clearances"?

[akronos]

Yyes  sorry, Valve Clearance. i Set between 0.08-0.13

[Gixer1460]

Lighter colour means hotter burn. That isn't that bad - i'd say almost ideal. The other cylinder though ! ! ! either too rich or not burning efficiently! I've had heads with exhaust valves that come out white and whilst fairly extreme it's just a lean burning tune for max. fuel economy, not lean enough to burn / melt valves or seats. I'd be looking at #3 cos looking at the plug it's almost at the point of misfiring!