Carb connections

Steven58 · Post by **Steven58** » Fri Oct 12, 2007 2:22 pm

Have a CB72 1962. From the cylinder between the carbs are two pipes (Air vents, pos 23?) connected to the inlet filters. On the top of the carbs ("Pipe, Power Jet pos 1?"), there should be some pipes going somewhere, but I only have two nozzels screwed in there, connected to nothing. Can anyone tell me what should be the real thing? Have had a 2 bad lockups on motor and are concerned about my future riding...

Edit; this should be on another thread, but it is Friday late night here i Sweden... Sorry.

LOUD MOUSE · Post by **LOUD MOUSE** » Fri Oct 12, 2007 5:09 pm

The CB72 had Power Jet Carbs which had a rubber hose to each of the air filters and the Head has 2 vent parts which went to a plastic "Y" then to the second metal tube on the Right Air Cleaner. ..............................lm

Steven58 wrote:Have a CB72 1962. From the cylinder between the carbs are two pipes (Air vents, pos 23?) connected to the inlet filters. On the top of the carbs ("Pipe, Power Jet pos 1?"), there should be some pipes going somewhere, but I only have two nozzels screwed in there, connected to nothing. Can anyone tell me what should be the real thing? Have had a 2 bad lockups on motor and are concerned about my future riding...

Edit; this should be on another thread, but it is Friday late night here i Sweden... Sorry.

Steven58 · Post by **Steven58** » Sat Oct 13, 2007 3:41 am

Thank's for info lm. Will do some re-piping now. However, my air filters, both the original very old and the new from Apex Cykle, only have one connection each. Can I simply let the vents from the cylinder end where the pipes from the carb floats end? Have seen this on another Swedish bike.

LOUD MOUSE · Post by **LOUD MOUSE** » Sat Oct 13, 2007 6:19 am

You can do that or just put a tube from one to the other.
You really do need the carb tubes to the filters though. ....................lm

Steven58 wrote:Thank's for info lm. Will do some re-piping now. However, my air filters, both the original very old and the new from Apex Cykle, only have one connection each. Can I simply let the vents from the cylinder end where the pipes from the carb floats end? Have seen this on another Swedish bike.

Steven58 · Post by **Steven58** » Sat Oct 13, 2007 10:22 am

OK and thank's lm. By the way, what is the purpose of the air vents, i.e. ventilating what? Never seen this on any motor before.

LOUD MOUSE · Post by **LOUD MOUSE** » Sat Oct 13, 2007 4:05 pm

Something about removing moisture from the intake valve guides.
HONDA deleted them with the (1967???) CB/CL77 engine issue. ..................lm

Steven58 wrote:OK and thank's lm. By the way, what is the purpose of the air vents, i.e. ventilating what? Never seen this on any motor before.

danielmoto · Post by **danielmoto** » Sun Feb 12, 2012 1:00 pm

now i know cheers LM.

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Carb connections

Carb connections

Re: Carb connections