I purchased a used 400ex a few weeks ago and it has a 416 big bore kit.
It also has a new edelbrock qwik silver carb. An atv shop has told me that the ATV is "running with 50% of the power it’s supposed to". They recommended I go back to the stock carb. What does everyone think? (They didn’t know about the big bore kit)
Also the main issue currently is my head cover screws are stripped. I bought heli coils but now I’m reading through out the forum about GT Thunder? What should I do?
In case I got the name of the screws wrong, I included a picture. It’s the little screws where a few are missing (the others are a bit loose)
