When I just barely touch the throttle, it revs up from its normal idle of 1200 rpms to 4000 rpms. If roll on the throttle, the bike stalls. I made sure I gave it plenty of time to warm up, and I tested it for vacuum leaks but found none.
A few weeks ago I found 2 of the carbs and the petcock dripping into a puddle of fuel under the bike. It turned out the petcock vacuum was malfunctioning and ruined those two float needles which leaked gas through the cylinder and eventually into the oil and overfilled my oil.
I have since cleaned the carbs, replaced O-rings and float needles in all 4 carbs, replaced the petcock, changed the oil, sync'd the carbs, and replaced the spark plugs. I also did a compression test just to be sure and they are all within specs.
I know it's not the petcock because the bike does the same thing with an aux tank on.
UPDATE: I changed the spark plugs. Opened up all 4 carb bowls and blew compressed air into all the jets. I took out each pilot jet and they all look good. I adjusted the pilot screws back to 2.5 turns out.
I actually got to ride the bike! First time in weeks! The bike doesn't stall now, but at about half throttle it bogs down to low rpms.
Suggestions?
A few weeks ago I found 2 of the carbs and the petcock dripping into a puddle of fuel under the bike. It turned out the petcock vacuum was malfunctioning and ruined those two float needles which leaked gas through the cylinder and eventually into the oil and overfilled my oil.
I have since cleaned the carbs, replaced O-rings and float needles in all 4 carbs, replaced the petcock, changed the oil, sync'd the carbs, and replaced the spark plugs. I also did a compression test just to be sure and they are all within specs.
I know it's not the petcock because the bike does the same thing with an aux tank on.
UPDATE: I changed the spark plugs. Opened up all 4 carb bowls and blew compressed air into all the jets. I took out each pilot jet and they all look good. I adjusted the pilot screws back to 2.5 turns out.
I actually got to ride the bike! First time in weeks! The bike doesn't stall now, but at about half throttle it bogs down to low rpms.
Suggestions?
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