I've searched archives and found intructions on the KL mod but I was unable to find intructions on the Taffy mod (only lots of posts on results). While I am familiar with all the parts of the carb they reference, I have neither the skill or tools to perform these mods. While I am reading the KL intructions, I'm just not picturing the procedures. So I am reluctant to start drilling out holes in my carb. So correct me if I am wrong please. What I am gathering is the fuel squirt is way too long on the 99s. (I never timed mine but I seem to remember it being at least 3 seconds if not longer on my carb. That is with a full bowl, carb off and manual AP manipulation). I don't remember it actually hitting the carb slide though. So do I have to actually trim the rod? (My idle screw is all the in so the slide is pretty open already. Since I went to YZ timing a while ago, I have to have the idle set very high just to keep it running). So am I reading correctly that you want to shorten the rod only if you need too? But won't that just delay the time the rod hits the diaphragm? See what I mean, I just am not understanding what is getting accomplished here. So what you are doing here is drilling the AP cover out. Putting a screw through the cover that is adjustable. So you drill from the inside of cover out but you put the screw from the outside in? Is that correct? Any one in CO actually perform these mods? If so, maybe I can talk you into giving me a hand.