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Carb sync - feeling a bit dumb.
- Thread starter mxg3
- Start date
pglaves
#13338
You should find a small tube with a screw into the tube end. It will be either on the bottom of the carb or on the side. Remove the screw and insert the carb synch instrument hose over the end of the vacuum takeoff stub.
Last edited:
Here's a couple of threads/pictures that show where the vacuum port might be:
https://forums.bmwmoa.org/showthread.php?78114-1980-R100-T-BING-Carb-Question
See the shots with the horribly stained floats in the next link...part way down the page? There are two screw heads. The larger one is the idle mixture setting. The smaller one is the vacuum takeoff port.
http://home.insightbb.com/~cdpumphr/the_carb_chronicles_page_3.htm
Here's a picture with the port on the side:
https://forums.bmwmoa.org/showthread.php?58386-Carburetor-vacuum-problem
https://forums.bmwmoa.org/showthread.php?78114-1980-R100-T-BING-Carb-Question
See the shots with the horribly stained floats in the next link...part way down the page? There are two screw heads. The larger one is the idle mixture setting. The smaller one is the vacuum takeoff port.
http://home.insightbb.com/~cdpumphr/the_carb_chronicles_page_3.htm
Here's a picture with the port on the side:
https://forums.bmwmoa.org/showthread.php?58386-Carburetor-vacuum-problem
pglaves
#13338
It is possible that the stubs are there but are covered with plastic or rubber caps. It is also possible that the stub is there, open, creating a vacuum leak.
dennisdarrow
#4869 Earned Lifetime mem
Can't find anything about the bike you are riding or possibly just talking about......Anyway, been a few nights of sleeping since I worked on my early /5 but seems that these did not have a port for you to hook up a hose/instrument to. If it's that way, you are stuck being handy with your ears and the shorting method. Which, actually are just as good as the high dollar tubing/ATF/yardstick instrument that I have down in the shop...…...maybe check out filling out your profile???????????.....Dennis
pglaves
#13338
Real OEM shows the carbs on this bike to be Bing 94/40/107 and ...108, with the take off port on the side.
This was what I found. I removed the screw and connected the syncing tool. Thanks for the help.
dennisdarrow
#4869 Earned Lifetime mem
Duhhhhh…..Golly Paul, what would I do without you there to edit and correct.....
...….there It was right there in his comment to us all about the bike that I needed to know...……..lol....Thanks Bud......
