So this 98 mach z 800 triple is driving me crazy. The thing won't idle on the pto cylinder. It fires on the other two but the pto pipe stays ice cold. If you rev it a bit or run it on a stand it screams on all 3, but as soon as you let it idle the pto cylinder quits. It has excellent compression, about 130 on all 3. The spark seems sort of weak to me but is the same on all 3. Carbs have been cleaned spotless. Air screws are at 4 1/4 turns out (I saw on a post somewhere) adjusting it makes no difference. Have sprayed carb cleaner behind the clutch, no change in idle (thought maybe it was a bad crank seal). The sled runs good and strong when you ride it but will not idle on all 3. It seems like its not getting fuel on that cylinder. Anyone have any ideas, crank seals, piston skirts, anything? I would like to get pointed in the right direction before I tear into this thing. Any help is greatly appreciated. Thanks in advance.