'79 KZ650B donor bike, looks like PO tried to change out carbs and realized that a mechanic, he was not.A good cleaning should be all they need,bike has 21K miles on it and the barrels and slides appear to be gunk-free. Choke works smoothly, these look just like the later model famous Mikuni 29's with 3 phillips screws on top, just 3mm smaller bore. A good machine shop can bore these to 29 or over, no problem. I want $250, I'll pick up shipping charges in lower 48 using FedX, these are awesome carbs and on a warmed over motor will run like STINK(and, a LOT EASIER to adjust). Thanks, Tory, [email protected], or call, 512-535-8685, I'll have pix up soon.