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VM carbs

  • Thread starter Thread starter John W
  • Start date Start date
J

John W

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My 1979 GS850G is fitted with the vm carbs.According to the manual it has two fuel feed pipes going to the carb bank.On mine I find only one.On the sides of carbs 2,3 and 4 there are inlets for vacuum pipes???.I presume the one on number 2 is for the petcock diaphram,what are the
other two an 3and 4 for.???.The manual says no1 carb is on the left when sitting on the bike facing forward.
Please can someone help clear up my confusion.
Thanks
John
 
Those might be bowl vent hoses and not vacuum lines. If the bike runs at all that would be easy to tell, there's no suction on the vent hoses. Use the search feature to find more discussion on bowl vent lines, they can sometimes cause turbulence in the bowl and upset performance. I have a twin so this is justl from what I've read here. I have one fuel line, one vacuum line for the petcock and two vent lines on my carbs.
 
For the VM carb nipples #2 is a vent, #3 vacuum for the petcock, #4 vent
The T fittings between carbs 1&2 3&4 are vents/ overflow for the carbs
T fitting between # 2&3 is fuel inlet
 
Gentlemen,
thank you for the info,it clears up the confusion.

Regards
John W
 
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