Where is the CARB vent tube on a bike?
Where the tube passes through the bottom of the air box I used a 90 degree fitting that was left over from the canister plumbing. Then I used a piece of 5/16″ automotive fuel line, that seems to be kink resistant, and ran it to the left side of the bike then down the side near the clutch hose.
Where does the CARB vent go on an adventure rider?
My box-stock* early model has clear carb-vent tubes that run out and down. The left side one goes right down next to the clutch slave cyl. The right side goes…uh…down the right side. These tubes just vent the float bowls to atmosphere, so gas can move, and provide an exit for overflow therefrom.
Why do you need a carb vent hose?
The carb vent hoses are necessary I think cause they let the float bowl air pressure stay at atmospheric level rather than at the partial vacuum levels inside the air box. This helps the bowls fill up and also probably affects how much gas is drawn up through the jets.
How are carb vent lines sensitive to gas?
These carb are very sensitive to venting. We placed no filters on the lines as they do not breath (constantly suck) and as far as gas spilling in bottom of box we he did not see this as anymore of a problem than the stock vent lines on 03 spilling directly out bottom of box.
Where the tube passes through the bottom of the air box I used a 90 degree fitting that was left over from the canister plumbing. Then I used a piece of 5/16″ automotive fuel line, that seems to be kink resistant, and ran it to the left side of the bike then down the side near the clutch hose.
My box-stock* early model has clear carb-vent tubes that run out and down. The left side one goes right down next to the clutch slave cyl. The right side goes…uh…down the right side. These tubes just vent the float bowls to atmosphere, so gas can move, and provide an exit for overflow therefrom.
Why does my carb vent tube not work?
Some riders have reported that under certain conditions, (high speed following a semi ) turbulant air can upset the jetting. Our theory is that a increase in pressure around the vent tube can upset the fuel mixture.Has anyone else has anyone experienced this, and can comment.
These carb are very sensitive to venting. We placed no filters on the lines as they do not breath (constantly suck) and as far as gas spilling in bottom of box we he did not see this as anymore of a problem than the stock vent lines on 03 spilling directly out bottom of box.
Is there drain in bottom of CARB vent?
We placed no filters on the lines as they do not breath (constantly suck) and as far as gas spilling in bottom of box we he did not see this as anymore of a problem than the stock vent lines on 03 spilling directly out bottom of box. There is drain in box if it became excessive and it does drain directly onto exhaust.
The carb vent hoses are necessary I think cause they let the float bowl air pressure stay at atmospheric level rather than at the partial vacuum levels inside the air box. This helps the bowls fill up and also probably affects how much gas is drawn up through the jets.
We placed no filters on the lines as they do not breath (constantly suck) and as far as gas spilling in bottom of box we he did not see this as anymore of a problem than the stock vent lines on 03 spilling directly out bottom of box. There is drain in box if it became excessive and it does drain directly onto exhaust.
What causes CV carburetor to not spray fuel?
4) Accelerator pump weak or not spraying. Check that fuel sprays from the accelerator pump nozzle when rolling on the throttle (test with engine off). The accelerator pump diaphragm will wear or crack over time or if left to sit in a fuel filled CV carburetor for extended periods and will eventually deteriorate.
What do you remove from a Harley CV carburetor?
Remove the Harley carb pilot jet. Remove the mixture screw, spring, washer, and o-ring. Spray a small amount of mild carburetor or fuel injection cleaner into the pilot jet passage and mixture screw passage.