Reply To: Spark plugs burning rich. – GT125R
2.5 turns out each pot. Leave it there forever & ever. If there is issues , the bike needs attention elsewhere (meaning leave mixtures alone after this)
Factory is around 3 turns out each. I would NOT try to go below 2.5. Jetting is easier than messing with mixtures.
If the plug is “oily” with oil drops , consider the valve head seals like this one
Engine Valve Stem Guide Oil Seal (x4 Seals) – Various Hyosung Models
But inspect the plugs first , then fit a NEW set of CR8E , as old plugs that are fouled won’t make full power anymore.
Service manual says plugs are that are fouled (either too soon or ages go) must be changed right away.