Spark plugs burning rich. – GT125R

[Brian]

Appolagies for all the questions, I am learning as I go. If my plugs are burning rich, which way should i adjust the air mixture screw? Should there be less air or more air to correct this issue? Thanks in advance!

[♠️ M77]

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.

[Brian]

Appreciate the feedback Marcel, I will be seating the valves this week when my head gasket arrives, I ordered it from your shop. Thanks again.

[Brian]

I think there is just carbon on the plugs. Will try this

[Author]

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