Marks or UFO?

[KDIMD]

I will try all 3, but am in the Philippines so not planning on shipping them back to the states.

 

[Mr. Max]

So I got the shims, I decided to go straight with thickiest (purple coloured, .03"(?) about 0,8mm) because plug tips were white. Like scary white. How much I should ride before checking plugs again? So they have taken this "new" colour of new mixture?

Sorry for the OT.

 

[Traumahawk]

Well you should notice a difference right away with how the bike feels when you ride. When I did mine....I went off of feel, and then just look at my plugs when it crossed my mind.