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Discussion Starter · #1 · (Edited)
I am having trouble getting my KDX220 tuned and need some advice.....In 1st, 2nd gear etc. I am getting a bog yanking the throttle off idle, and it will it when I twist to 1/4-wot mostly when I twist it quickly. I have tried the DEK needle on the 2nd, 3rd and 4th clip from top. I have tried a 40, 42 pilot with no changes. It felt rich with the 42 with the needle on the 3rd and 4th clip. I’m thinking the low vacuum at low rpm combined with higher throttle positions is not providing a good source of fuel. I have FRP porting, rb head mod and carb. Any tips?
 
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