Carbs-Jet passages plugged

thomasgeorgi · Post by **thomasgeorgi** » Sat Jun 02, 2007 9:23 am

I have been doing a much needed carb cleaning. They are still in a bank, the floats, slide tops, jets, and etc have been removed. I really don't want to separate the banks. Spraying into the main passage of the number three carb accelerator pump produces a nice stream out the number three nozzle, but nothing out any of the others. I shrunk ( is that a word? ) some heat shrink so that I could slip it over the nozzle and thereby force the Berrymans out the other nozzles. I also used the same heat shrink to try and force the spray up stream thru the nozzles first. I only got the third carb to work. I sprayed thru the main passage and then thru each of the nozzles as best as I could; three times in two-three hours for a solid week. Then I tried the same with Marvel Mystery oil and PB Catalyst. Nothing has had any improvement. These passages may have been plugged since I bought the bike ( '79 ) in '83. Any help would be appreciated.

alimey4u2 · Post by **alimey4u2** » Sat Jun 02, 2007 7:14 pm

Welcome to the site thomasgeorgi, I'm no expert on Keihins but for stubborn blockages, soaking in Berrymans for a long time or use of an ultrasonic cleaner may work.....Failing that, you are looking at mechanical removal ( if accessible )

Chris · Post by **Chris** » Sat Jun 02, 2007 7:26 pm

And after a lot of soaking, maybe some compressed air. Compressed air and a rubber tipped blow gun finally fixed my stubborn clogged carbs.

daves79x · Post by **daves79x** » Mon Jun 04, 2007 6:26 am

100 lbs of compressed air will open them up. Are you sure you are have the right angle on your spray tip into #3 accelerator pump passage? You have to angle the tip just right to get cleaner to blow left and right. They may not be as plugged as you think.

Dave

thomasgeorgi · Post by **thomasgeorgi** » Tue Jun 05, 2007 7:04 pm

I am not sure that I had any angle on the spray nozzle, but I did shrink some heat shrink so that it barely fit over the #3 accel jet/nozzle. I thought that would force the berrymans out any other jet/nozzle. It didn't. Was my thinking wrong. Thanks for the input.