So I got the OKO on the GG tonight. I'm not sure what the hell they expected me to do with the throttle cable... it's way too long with the OKO top, since it doesn't have the long collar that the Keihin has, so I just used the top off the Keihin. Aside from that, it looks pretty well made... it's almost an exact knock off of the Keihin with a few small observable differences (although permit me a moment to relive how much of a pain in the ass it is to get the throttle cable attached to the slide). The only real 'feel' difference is with the slide spring. It feels like all the TRS's I've ridden, which is to say, heavy, or at least heavier than I'm used to. As for jetting, first off, I'm amazed at how sensitive this carb is to air screw adjustments. Very small changes make a huge difference. It's jetted 120/52/JJH. At 3/4 of a turn out on the air screw, it runs pretty well most everywhere. The one exception is putting it in fifth and grabbing a big handful, it'll bog a little. I'm tempted to go up to the 55. What say you?