I'm driving myself crazy with this bike. No matter what i do, i can't seem to get it running right. The main issue is the idle. While it does idle, it sounds as if it's going to die at any time. i've played with the mix screws, carb balance, and idle adjustments. I've completely taken apart and cleaned the carbs twice (Wanted to make sure all the passages were clean the second time!) The repair manual I have says 2 turns out for the mix screws, and idle between 1000 and 1100. At that speed, there is no way that I have found to get a smooth idle. sounds very bad (like rattling gears). I need a step by step guide to properly adjusting the idle mix screws and carb balancing. I have the mercury tool to balance the carbs, but the engine seems to sound worse when the tool indicates the carbs are balanced. The top end has been completely redone (Valves and piston rings). Compression is good. If anyone can walk me through this, i would be so happy! The bike is totally stock. I just want it to run right! If anyone can provide factory specs, that would be a help to. BTW, does the octane level of the fuel matter....I have herd that premium gas makes these bikes run poorly, but my repair manual says to only use premium...does it matter?? I tried both and didn't notice much of a difference. Thanks in advance for any help!