2 entirely different circuits, employing separate fuel/air paths. A transition area exists between the 2 as well.The only thing left to clean is the pilot jets. I just don't understand why I can get the bike to pull from the main jets if the pilot jets are clogged.
absolutely YES you are wrong. you obviously have some mechanical knowledge. but none as to how CVK carbs work. they are not like an ordinary carb. you need to bone up on this as explaining in detail would take two hrs. I don't have. besides it so boring you would be asleep before the end.My question is, would a single plugged pilot jet or even 2 plugged pilot jets prevent the bike from sucking fuel from the main jets because I can run it on 50% throttle if I spray fuel into the carbs but it won't continue to run its self at 50% throttle. Seems to me like if I can get it to run at 50% throttle it should be pulling fuel through the main jets and should continue running, but that is not the case. Am I wrong in assuming that?
I took apart the pilot jets and cleaned them with a guitar string. Turns out I use 12s on my acoustic so I was all set. Can see light through them. Shot carb cleaner through all the holes on the circuit. Put it back together and now it's doing what it was doing the day it happened. Starts, idles to a crawl over a several seconds. Dies. If I give it throttle it dies immediately. If choke it, I hit 3krpms for a second, then it dies.2 entirely different circuits, employing separate fuel/air paths. A transition area exists between the 2 as well.
Limiting the efforts to pulling the pilot jets leaves out a lot. To TRULY clean the entire pilot circuit, the pilot adjust screws MUST be removed as well. Take note of the spring and tiny washer and oring. REPLACE the pilot orings with new, it'll be deformed, flat or rock hard or all 3. Replace the bowl orings with new as well.
If you continue having difficulty, consider a full, pro refurb from that Crab Service guy on here. These EX's getting old, more extensive carb service becoming a requirement.
Forgot to add....the spray "priming" procedure direct into venturi bypasses all the above mentioned circuits....
Any intentions of clearing the fuel pick up points in the starting (enrichening) circuit?
No I'm just blasting carb cleaner through it.Varnish and corrosion in carbs is not selective, it invades everywhere, clogging circuits deep within, not visible. In your case more effective methods are required to produce genuinely positive results. Nothing unusual, some carbs worse than others due to varying conditions, maintenance history, storage conditions, dormancy....requiring different levels of aggression using varying methods....some more effective than others. Example, are you using actual compressed air? (not from a can)
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there is a filter in the petcock, on the tank side. that's the first thing that gets clogged when you see that much corrosion on the fuel lid.Bike starts if I force fuel in via carb spray ect. I know this is just a fuel delivery issue but I just can't seem to figure it out.
Backstory: pulled in the driveway after a ride and bike was bogging. Made sense, I was low on fuel. I fill it up, it starts but bogs and dies after seconds. If I give it throttle it does immediately. Obviously its beyond being low on fuel. Now it won't start at all unless i spray in fuel or blow in the carb vent which forces fuel ro run out into the carb
Petcock: FINE. Press starter with fuel line detached and fuel sprays out
Carb: Also seems fine. Blasted out jets with carb spray. Needle and diaphragms look fine. Everything moves fine. Floats both move together fine. I have fuel in the float bowl BUT WHY ISNT IT GOING INTO THE ENGINE??
I have never been so stumped on what should be so simple. The fuel is in the bowl, the jets are open why isn't it sucking in fuel?????? HELP
Vacuum lines all seem to be fine.
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Got an air compressor. Blasted the **** out of every passage way with air compressor and carb spray back and forth. Everything has to be good. Start it, she runs. Barely.Copied from OP's 1st post..................."Backstory: pulled in the driveway after a ride and bike was bogging." "Bike starts if I force fuel in via carb spray"
Clearly a carb/fuel issue. And OP's efforts at a carb clean without the use of genuine compressed air went (understandably) unrewarded.
Sure, he can play with compression/spark tests, but the starting when direct priming is the big telltale leading to a fuel issue.