Hey loud (aka kz550 god) Or anyone else who knows

OK so I have spent like 2 weeks reading the forums and there is an amazing amount of info here but it still does not give me the info i need, I'll explain.

1981 KZ550 LTD
TK-22 Carbs
Pods (i know i know)
dunstall style megaphone dual exhaust (slip on's)
Pilot Jet drilled to 36.8 ((#79 bit)
Main Jet drilled to 96.5 (#62 bit)
Aftermarket Needle (also known as 4D93 The Canadian adjustable needle) at Clip position 3
Vacuum lines blocked, and valve cover vents looped, verified petcock works at prime setting and on setting with the motor running. new fuel line at a steady smooth bend and vacuum lines checked for cracks (replaced when cracked of course) made sure the plug wires was not touching any part of the motor or frame/tank/etc the plugs looked ok not sooty but not white. I r confused.

I've gone thru these carbs with enough cleaner to degrease a car engine and followed it up with air that is ran thru a water and a oil separator and bench sync'd them

Once she warms up she takes off from a line pretty nice not to much lag in the throttle and can rev out to about redline in 1st and 2nd, 3rd it bogs about 7 grand 4th-6th thou it won't get much over 6 grand Also 1st and 2nd will let me WOT 3rd will to sometimes.. bit 4th-6th.. no. It reallly needs to be coaxed up to 60mph and when you let off the throttle it pops a little sometimes, it is my understanding that the popping is lean but I've got my air screw only 1/2 out any further it pops like mad when you let off also it seems to run better at 1/2 then say 1/4 out, The baffling part is it acts the same as it did when i had the main jet at 94. The RPM and power seem to be unchanged about 1/2 throttle to WOT and it kinda bogs and playing with the choke does not seem to effect it much if any at all besides full choke makes it want to die. To be honest I'm growing tired of pulling these carbs, I've done it so much now I've got it down to a science lol

Any help here would greatly appreciated and praised greatly.

Thanks!
Phreak

My purple kaw (moo)

u say it runs better with the needle 1/2 ,out than 1/4 out. not sure what u mean by this. do u mean clip 3 runs beter than clip 2 ? this would mean u made it leaner, and got less poping.if so try 3/4's out, clip4.
i would not recomend drilling out jets. i know guys do it but not me.they have a venturi in them, so when u drill them larger u get less or no venturi efect. this would cause less vacumm .

The air screw sorry i'll correct the post

I've been thinking maybe go up in main jet to 99.1 (bit #61) which is as high as my bits go, but i don't know, i had like 113's in it with stock (32) pilots with no air screw access and it ran like crap and fuel fouled the plugs and i pulled the carbs and cleaned the plugs and slapped the 94's in it

TIP for future readers..
I was scared to drill the caps out until I had a great idea with a 1/8' bit and a variable speed air die and go slow it's about 1/4 thick stick ya a micro screw driver in there ... POP it's out no worries this can be done with a dremel to the same effect

the air screw wont help u at full throttle, just the mains.

So you think i should move my clips to the 4th position?

This will make the throttle richer right?

wait no, that should make it richer yea but not much on the end of the throttle more on the start

Do you have a timing light? Can you verify the timing on all 4 plugs? That is, from F mark to double line mark and back, and at the RPMs specified in the manual. To get marks on the 2-3 side, just draw a line from the 1-4 mark, through the center of the advancer, to the other side. You'll have to estimate a little bit.

It sounds like a possibly frozen advancer. That will stop a motor from developing any power, but it may rev fully with no load. Have you tried moving the advancer by hand? It should easily move forward to a stop, then snap back... like a well oiled gun.

Even with stock jetting, it wouldn't run that bad just from having pods on it. If it was a lean main jet, you would initially be able to go WOT in high gear, as that is when it would be rich. As the RPMs go up, then it would start hesitating (from leanness). But if you can't go WOT in higher gears, it's not likely the main jet. A retarded advance would cause that symptom, and would be very sputtery, as if the ignition was failing.

Other possibilities, but not nearly as likely: Weak coils, weak igniter, plug gaps too big (way too big), .... probably others I'm forgetting.

ugh ignition stuff lol
I don't have a timing light

i verified plugs at .28-.30

I have power up 2 second, good power once it's warm, i'm 270 and it'll put me back a little bit. higher speeds i seem to lose power.. over say 40. Also i forgot to mention once in a great while i get a pop from the carbs

(edit) reading about the advancer now...

little background

This bike ran kinda crappy when i got it the guy never cleaned it, stock exhaust with baffles removed, i put the dunstall's on it new seat cover, turn signals and kept on trucking without to much issues besides it being a kinda a gas hog i think. then it started to run like crap and i looked in the air box, and all the foam was gone around the filter and it had clogged up the carbs, i had been reading your stuffs about pods and such so i got pods and went thru the carbs... with a stock kit, and it ran like crap... started jetting... here i am

OK so i'm not exactly sure what should spin inside this thing, but nothing moves by hand... i've seen posts about the oblong lobe lobe spinning clockwise but the pictures always show it out of the bike, do i need to remove the unit in order to see if it spins?

OK i took the plate off and even the levers wont move and there is bits of rest kinda everywhere but not covering it, and what looks like corrosion? white substance inside it but not on anything else, the plate and mags are nice n clean n pretty, almost like they are newish... i hit it all pretty good with 3-3-6 and i'll see if anything else moves in the morning.


Phreak

This would not be good: :pinch:



Good Fortune!

is that collar supposed to spin?