I need some more insight!

[joe]

Hey everybody, I have a 90 Kat 600 that I'm trying to get up and running.

I have uploaded some videos that better depict what the bike is doing.

Here is what I have done so far:

valve adjustment, carb tear-down and thorough cleaning, factory pro jet kit (112.5 main, needles on 2nd position from top), ignition advancer, new o-rings and gaskets (as described in carbs 101), float height at 14mm (as per factory pro instructions), new ngk spark plugs, new o-rings on carburetor boots, new air cleaner. Oh yeah, a/f screws are 2.5 out. I also made sure that none of the clamps were overtightened.

I'll let the videos speak for themselves

[ame="http://www.youtube.com/watch?v=6pvW2T8a8YA"]YouTube - dscn1063[/ame]

[ame="http://www.youtube.com/watch?v=E-cPH5s0aaw"]YouTube - dscn1062[/ame]



Anyway, I hope that someone with more experience can pick up something from these videos and offer a suggestion or two. I honestly don't know what else to do.



EDIT: pulled the plugs and all are white........so, she's lean at idle right? I'm going to pull the carbs again and verify correct float height.

[Rowdy]

.

The URL contained a malformed video ID

[joe]

dang it
ok, let me see if i can fix it

ok, fixed.

[ICEG]

it sound like the idle is not set right thats y it dies or the floats
thats my guess but dont take my word on it i might be wrong

the top end of the rpm range sounds ok but its the bottom that sounds wierd

[Kreylyn]

If there isn't a vacuum issue, only 3 things really control the idle...

A/F screw setting
Float Height
Pilot Jets

If the jets are clean, and the floats are correct (needles working properly) then adjust the A/F screw settings out 1/2 a turn (3) and try again. Keep trying that till you get to 4.5 turns out. If it STILL won't idle at that point, you need to look at the floats/pilot jets again. Something isn't right there.

Krey

[joe]

well, i think i figured it out.....no i didn't....i guessed and it seemed to work. I pulled the carbs off and verified float height. The bike would not idle and I would get a serious bog when i tried to goose the throttle. In my desperation, I changed all the needle heights from the 2nd position to the 3rd position. I compared the FP needle with the stock needle and it appears the 3rd position is comparable to stock. So, essentially, I took it back to stock as far as the needles are concerned. I also removed some inline filters I had installed.

Now, she idles smoothly and I have smooth acceleration throughout the RPM range. There is still some hesitation when i romp on the throttle, but I have yet to complete a carb sync. First, I need to figure out what liquid to use that is heavy enough to prevent the carbs from sucking it up the tube. I was using 10-40 oil (in a tube that was approximately 24-36" long) but that didn't seem to work.


A quick prayer to keep me from setting the bike ablaze and some guesswork appear to have worked wonders. Now, I'm gonna

[Kreylyn]

well, i think i figured it out.....no i didn't....i guessed and it seemed to work. I pulled the carbs off and verified float height. The bike would not idle and I would get a serious bog when i tried to goose the throttle. In my desperation, I changed all the needle heights from the 2nd position to the 3rd position. I compared the FP needle with the stock needle and it appears the 3rd position is comparable to stock. So, essentially, I took it back to stock as far as the needles are concerned. I also removed some inline filters I had installed.

Now, she idles smoothly and I have smooth acceleration throughout the RPM range. There is still some hesitation when i romp on the throttle, but I have yet to complete a carb sync. First, I need to figure out what liquid to use that is heavy enough to prevent the carbs from sucking it up the tube. I was using 10-40 oil (in a tube that was approximately 24-36" long) but that didn't seem to work.


A quick prayer to keep me from setting the bike ablaze and some guesswork appear to have worked wonders. Now, I'm gonna

Use the dual bottle setup, instead of a single tube...

Krey

[joe]

darn it, i may have spoken too soon. I took the bike out for a spin around the block and, for awhile, it was very responsive and smooth through acceleration. Now, when i goose the throttle it is very sluggish to respond. I think I have fouled the plugs. I'll take them out tomorrow to confirm.

[scottynoface]

Runs great cold and gets worse as it gets warmer sounds like a rich condition.

http://www.factorypro.com/tech_tuning_procedures/tuning_carbtune,CV,high_rpm_engines.html

Oh and quit hitting the throttle with the choke on.

[Astro4x4]

For manometer fluid - go to the drug store and get some glycerin. Throw a little blue or black ink in it and you're good to go.