help needed with my kelhin 40mm arb (650sx)

[mattchappell2002]

hi i have just recived my 40mm kelhin carb i ordered i just have a query about it. i have fitted the low and high fuel lines like for like off the old one., but on the front of the carb(facing hull) i have a mounting point for anotehr pipe. the same thickness as the fuel line can anyone shed some light on what goes on this .., many thanks matt

 

[Waternut]

The line fitting that points aft is for the pulse line (the fitting is actually the fuel pump so if you had an external one you won't need it now)... It goes to the engine crankcase. You should have an identical fitting sitting right behind the carb on the engine itself.