Honda-SOHC
SOHC.co.uk Forums => CB500/550 => Topic started by: Maax1200 on July 22, 2021, 03:01:17 PM
-
I have a quick question regarding the emulsion tube on a CB 500 -74. I was watching Classic Octane and the episode where he rebuild a set of carburetors (very helpfull).
There was one thing that confuses me though. When he installed the emulsion tube he said that the end should be flush with the carburetor body. Thats not how it looked/looks in my case (see pic). So witch is correct?
/Magnus
-
Perhaps he was referring to the seating face on the emulsion tube that must fit flush with the carb body inside the alloy turret, ie out of sight, underneath . I'm sure that needs to be a perfect seal .
-
I checked again and he was talkin about the other end, where needle meets the jet insider the bore. Wierd thing is that the emulsion tube can be mounted either way, either fully seated like in the picture or flush with the carburetor body like Classic Octane say. On the other hand, he says "basically flush", what ever that means.
-
Make sure if you are changing the emulsion tubes you also replace the needles as they are matched. Took me ages to troubleshoot this problem on mine.
-
What works for me, is just use the main jet to push the needle jet in position. BTW, I've lost all interest in Classic Octane's videos since he managed to post a vid about setting the ignition timing without mentioning the importance of first adjusting the breakerpoints gap.
-
Magnus, there must be a bit showing through in the choke area, like the photo, as it is the air/fuel mixing chamber. To tell which way up, most of the emulsion tube holes should be towards the lower end and the thick end of the needle should just fit in the jet at the top of the emulsion tube.
Hope that helps .
Regards from East Yorks.
-
Second that advice. My carbs where a virgin rebuild and the emulation tubes have orientation as described in the previous post.