Re: 1980 CB750K Carb Issues
Posted by
rhinocb750k on
May 29, 2013; 12:24pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/1980-CB750K-Carb-Issues-tp4041372p4041435.html
Thanks for the reply,
I have stock air box, although some of the air box rubber boots are cracked from pulling carbs in and out, not sure if that has an affect or not. I don't have SOS, I don't think I have a vacuum teat either? Plastic T is open. I was able to get spray out of the pilot screw port and small hole inside the carb body in front of the butterfly.
I'm not sure what to try next...
On Tue, May 28, 2013 at 9:23 PM, seestheday [via Honda CB750'S]
<[hidden email]> wrote:
This reads like you read and followed the carb cleaning manual well.
Backing out the fuel/mix screw should fix this if your idle jet is truly clean. Sucks that it is pressed in on your model.
Are you running the stock airbox? Did you bypass the SOS and made sure to have the vacuum teat plugged, but the breather open (plastic "T" in between 2-3)?
Also, to confirm - you held one finger over the mainjet hole, another over the lower air cutoff hole, and then sprayed cleaner through the slow speed emulsion tube. When you did this you got bubble out of the pilot screw tube and the little tiny metering holes? The carb cleaner spray straw will have to be wrapped with electrical tape to get a snug fit.
There is a way to drill and pull the pressed in slow speed emulsion tubes out, but damn, that is some tricky stuff I wouldn't want to try if you don't have a spare set of carbs.
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
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