Steve
GS Whisperer
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Z
Zero260
Guest
I sprayed carb spray through the air jet on all carbs and it did come out by the pilot, I also took the pilot screws out and sprayed back through and it came out the air jet. So I don't think to pilot is plugged, unless there is something I'm missing.
Steve
GS Whisperer
Did you see anything come out the FUEL port? :-k
The air passages seldom get clogged by dried-out fuel deposits. :-\\\
.
This is one of those situations when I wish I lived nearby and could just go over and fix it.
Trust us, it's a problem in that area and once you find it you'll say ah ha.
See the black arrows? makse sure it's clear from the main jet well to the pilot well. fuel goes in there, mixes with air and the foamy mess ends up where the white arrows are to the mixture screw. That's why it's called a mixture screw.
there is a micro hole in the pilot jet, it needs to be clean and not damaged. The hole is in the thread end. If it's on the tip you have the wrong style ( ask me how I know that
)
Trust us, it's a problem in that area and once you find it you'll say ah ha.
See the black arrows? makse sure it's clear from the main jet well to the pilot well. fuel goes in there, mixes with air and the foamy mess ends up where the white arrows are to the mixture screw. That's why it's called a mixture screw.
there is a micro hole in the pilot jet, it needs to be clean and not damaged. The hole is in the thread end. If it's on the tip you have the wrong style ( ask me how I know that
)
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Zero260
Guest
Which fuel port should it come out. I had it come out the needle jet.
For one thing, even if the pilot screws are open too far it won't cause a black and smokey exhaust. If that's happening something else is wrong. I'd open up the pilot screws to 3 turns and perform a vacuum sync. Also check fuel level not just float level if you haven't already done so.
Z
Zero260
Guest
So far since starting thread. I made sure pilot air passages were unplugged(after reading your comments iI will probably need to check the fuel passages). Checked fuel level and had to raise my floats to lower my fuel level between .5mm to 1.5mm across the carbs, apparently I didn't do this to will before. That helped the idle a bit, it would respond to pilot tuning better. But I than ran into a lack of fuel at 1/2 to 3/4 throttle. So tonight I raised my needles about 1mm and went for a test ride. She runs great but still hangs for about a second at 2k when coming to a stop. I will try to mess with the pilots more and get it tuned in. Thanks for the help and support
L
langit
Guest
This seems like an interesting thread, hopefully get learning gained enlightenment
S
Sand_fiend
Guest
This is exactly what i am going through right now. what is the pilot jet your talking about ?. i thought all pilot jets sucked fuel up the threaded end and exited out the tip and the sides ? I know there is a micro hole at the tip. Should these jets on these carbs not be there ? This read has given me more to look at. i too have bought new boots, re set the valves and a complete rebuild kits on the carbs. 3 of the 4 carbs also make the plugs Black with soot so i am assuming that 3 have still clogged pilot jet passages..
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Zero260
Guest
The pilot jets ate the small jets you access with the fuel bowl off. The are under the rubber plug. You say you rebuilt the carbs did you do them?
S
Sand_fiend
Guest
Yes, i did it twice.. now three times. i dipped them in carb cleaner apart for 24 hr then used a lot of carb cleaner in all the ports. new gaskets, o-rings, mains and pilot jets. I took the carbs back off about an hour ago and looked at things i read on this thread.. I took them apart and found one, that the hole at the bottom of the air screw was plugged. by spraying carb cleaner with the straw tube down in the screw base. 3 were clean, one didn't flow any cleaner. on the other two using compressed air, i blew in to the air jets on the back of the carbs. two were plugged, two were flowing air through. i let them soak in cleaner for a few then tried to plug all the holes that connect with that air port with my fingers. i used the air back up the pilot hole and blew a chunk of something out of both those carbs. they flow free now. im hoping to put them together in the morning and see if it will idle without having to turn up the idle screw to 2000 rpms.. So what i thought was clean twice was not after reading the thread..
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JJ
Guest
You say you have done it three times. Wrong.
You still haven't cleaned them correctly. If you follow the tutorial and do it correctly, using the chemicals and tools called out, it takes only once.
You still haven't cleaned them correctly. If you follow the tutorial and do it correctly, using the chemicals and tools called out, it takes only once.
S
Sand_fiend
Guest
First of all.. sorry for the Thread jack zero260.. this thread has helped me find my problems.. so if i can do it, so can others. just hang in there when you see no end in sight..
No twice wrong. I never thought to clean out the passageways because i thought soaking them for 24 hours would be enough. i did blow air through the passages after cleaning them but never knew how the passageways worked. with that new info i was able to find 3 restricked areas. after cleaning them again it runs great even without syncing them yet.. I was about to through in the towel on these carbs. i knew they were the problem from the start. now i can finish the project.. my friend Marco said it will never run with these carbs.. the bike has a wisco 635 bigbore kit and Mega cycle street/race cams among other new goodies..
here is a Video of starting it... https://youtu.be/7G2ZnbbvI4Y
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JJ
Guest
Congratulations on finally getting it running better. Sync those carbs and take it out for a test ride.
Z
Zero260
Guest
I know this thread is aa little old now. But my problem ended up being the po used vm carb pilot jets instead of cv pilot jets. Bike no longer has sooty plugs.