Oil Color

[71Twister440]

What range are those? You should be taking the cad of about a thread down for pump gas. You are at the tread. So that's a bit cold. You should see an improvement with 1 range hotter plug and you should be able to pull a little timing out.

NGk FR4, darker pluga next to the new plugs are before i cleaned the carbs and was at about 14 initial timing, the 1,7,8 plugs are also FR4 but after with 18 initial timing

 

[yellow rose]

That's a bit strange. 4 is a hot plug yet they look a bit cold.