vacuum

On Friday, noticing that the bike was running lumpy at low revs with a very erratic idle, and unable to establish any obvious cause I took it off to my local Yamaha dealer to do the necessary. The diagnostics computer revealed nowt wrong so, as the guy said, "it's down to spanners and spotting...

Hi, i have problem to sync my carbs. The screw with withe paint is original all way in(closed) that mean max vacuum. The middle carb(screw) is also full in, closed. And the 3rd carb is 1 turn from full closed. By turning the screew in(closing) the level of liqiud in tube is growing up(higher...