colortune and its nothing but blue.

well since i rebuilt the carbs been waiting on the colortune to come in from europe, and well i got the bike running lil lean and pretty well i might add.. well i tried colortune and well i screw up the whole sync of the carbs, they all blue whether i turn clockwise all the way in or ccw and it almost coming out of the carb. now the bike and running like shyt and stumbling severly and i cant get it back down.. what is the general set to place the carbs mixture to find a start point again.. oh and for the 411 the carbs have pods and not been rejetted.. please any info on getting this thing back on the road.. before i got the colortune and cleaned the carbs the bike ran rich till i screw in a lil till plugs showed it was running slighltly lean.. so i know it does burn rich but the colortune did not show accordingly. please help PM or respond here. thanks

 

Okay, check this out.... I had the same crap happening to me. First thing is you have to make sure you sync the carbs then you have to make sure that you are idling at around 1200rpm or a little lower. If you are idling higher then you will not be able to colortune because the other jets will kick in!!! You only want the pilot jets operating for colortuning. If you are idling at 1200rpm then you may have a torn o-ring from the mixture screws and it or they are clogging a passage. Anyway, stop and take a breath and think about things. Both of these happen to me so I know that if you are idling to high you can't colortune and if you have a plug up in the passage of the mixture screws you can't colortune. First though you want to get your sync set close at least then bring down the idle to 1200 or even a little lower, then colortune. After that sync again and colortune again and boom you're done.

 

Once you get the colortune to work for you then you make it turn orange (rich). Then turn it in until it is just blue and stop. You want it right on the edge.

 

The Prep to getting Colortune to work for you is how welll the Rack was Bench Synced.
Use Strips of 3X5 Card or Resume' Paper.
Bench Sync the Carbs with the Throttles as CLOSED as you can get them.
Set a working Idle of 1,100 and adjust it to a slower rpm as Fine Tuning progresses.
Then, the Colortune will show you the Change in Air / Fuel.

 

well i i bench sync them using small zip ties, since didn't have neither index card or paperclips.. rick the thing was running like a sewing machine prior to color tune.. granted it doesn't idle below 1250 on near 1000 rpms but she idle fine if set at 13-1500.. i wanted to colortune to do it right... right now i think i was better off leaving well enough alone and stayed confident in my tunning abilities. hell i was getting 34+ mpg but brand new day brand new start

 

Did you adjust valves before attempting to sync carbs? If the valves don't open at the correct position, the vacuum will be off, and therefore syncing will never be correct.

 

Sounds to me like a lot of stuff kinda got skipped over.

First off: VALVE CLEARANCES. As related above, you can't get a good sync with out-of-spec valves. Synchronization is a vacuum thing, and out of spec valves produce wonky vacuum at different revs.

Then: Bench sync; but that's just a preliminary sync, like dry setting floats is just a starting point.

Once back on the bike; BEFORE you break out the ColorTune, you need to do a running vacuum sync. This is done using some sort of a manometer (vacuum gauging device) which can be anything from a hunk of clear tubing hung from a yardstick to two baby bottles to a vacuum gauge or a Morgan CarbTune. If you have a YICS motor, that needs to be blocked off for this process as well.

Once the carbs are synchronized THEN you break out the ColorTune to fine-tune the mixtures. You don't use the ColorTune to sync with.

You skipped a whole bunch of steps which is why it's not running right for you.

 

okay, maybe its absent mindness or i wasnt clear... everytihng needed to do was done, number 3 intake and number 4 intake and exh. vales replaces everything is good, comp, spark and fuel.. the question was proper colortune, not how to get to colortune.. if i got this far must have meant i have done certain things to have bike purring and producing 35+ mpg.. never knew you had to vacuum synce before colortune.. first for me.. as stated above only thing not done was the manometer and colortune.. i am slowly but surely realizing that the dead horse gets beat over and over, it forces me to figure it out without worthy advice to compensate the time it would take. im gonna go back to what i knew was working, no need to create a problem if there is isnt one.

 

I just vac synced my carbs and tried the old girl out for a spin, comparing performance to standard paperclip bench synch, vs Vac sync. Revs and acceleration is so much better. I am still to colourtune which i will do eventually, as No 4 pot is running slightly cooler than 123. possibly a bit rich?

MPG on most recent fill up came out at 38mpg It will be interesting to see if mpg improves, however accelerating now to 7000 + methinks fuel consumption is likely to drop..! a little

But the bike can certainly shift..

 

We are trying to help you however it seems as though you may not understand what some of us are trying to tell you...
#1 You need to vac sync the carbs before you colortune because this will change the results of the colortune.
#2 You just said that you are idling around 1500rpm.... This is to high to colortune! You can't colortune properly when you idle to high! This is because the other jets are starting to kick in and this is why you found you couldn't get the colortune to change color! Idle no more than 1200rpm and you probably will be able to colortune unless there is a blocked passage in the carbs. If after you sync and bring down the idle, you still can't change the colortune color then you probably have a blocked mixture passage. This can occur from dirt or debris or possibly one of the idle mixture screws o-rings has broke and is now lodged in a passage.
#3 Once you are able to colortune, you will need to do #1 and #2 twice (sync, colortune then sync colortune again) This will get you where you need to be.