So I have been trying to chase down a hanging idle in my 2001 YZ426. I inspected the cables & found a spring installed by the previous owner on the throttle pulley to help force the throttle closed. I removed the spring & adjusted the cables to get 3mm of free play but still had a hanging idle. I removed the cables, cleaned & lubed them, tested the pulley without the cables in place. Cleaned & lubed the throttle tube. I found the pulley snaps shut fine without the cables. After installing the cables & noticing the throttle snapping shut fine with the bike off so I ran the bike & disconnected the TPS switch. I didn't notice any difference with the TPS on or off. So the throttle snaps shut when the bike is off perfectly but while running I noticed it will still hang at high idle unless I physically force it closed. After losing the entire riding day yesterday (more than likely our last up here) I decided to mess with the AP timing. What I found was that if I back the AP timing screw two turns out from it's previous position I no longer have the hanging idle concern. I rode the bike up & down the block & did not notice any bog & my idle did not hang. It seems that maybe while the throttle cables were closed that the AP was still engaged due to a very tight tolerance on the adjustment? Is this even possible to maintain steady pressure on the AP linkage allowing a steady shot of fuel at idle or close to idle which would somehow cause a very high idle? In other words directly off idle it seems like my bike was getting a full squirt vs. allowing you to roll the throttle on slowly increasing the squirt/power? My bike felt like the throttle was a "light switch" making it extremely hard to ride intermitantly when the idle would just jump sky high, on or off. So now I have a few questions, first what is the PROPER way to set the screw length, I have checked the factory service manual & Clymer to no avail. Also, does this seem like the right way to go? There was no bog after my adjustment but am I covering up another problem by using this adjustment? Everything I research says that there should be a bog as I back the screw out & delay the shot of fuel from the AP? My bike seems to like the delay from the AP. In other words it allows me to turn my throttle a few mm BEFORE the AP squirts, does this make any sense? It sort of seems like what the G2 throttle tube does if I understand the concept correct?