carb question

[walker70]

Hi,just got thru sticking another set of carbs on my bike but I am going to have to pull them again cause one of the float bowls is leaking,could this be why I could not get them synced up,three of them will but the one leaking fuel will not,thanks.

[walker70]

Hi again,got the fuel leak fixed but still can't get a vacuum reading on that carb so I am going to swap that one since I have spares and see if that will fix the problem.

[ekvh]

Are you sure you have decent compression in that cylinder? A compression tester is nice, but holding your finger over the spark plug hole and comparing it to the one next to it would be easier than switching the carbs. Also check spark? Swap the spark plug to another hole and see if it follows the plug.

[walker70]

Hi,got it figured out,one of the carbs was acting up,now all I am doing is resetting float levels cause they must have gotten some trash in them as well,thanks.

[walker70]

Hi,just curious,has anyone on here ever measured how much fuel should be in each carburetor as well as setting the float level???

[ekvh]

Yes. Use a piece of tubing to catch it can yield somewhat accurate results, but what’s the correct amount? Most have pretty good luck just setting by the book.

Examine each needle seat with a magnifying glass and you might see something causing the leak. (A nick or a manufacturer glitch) Make sure each plunger of the needle tip is working freely. If not soaking in fuel and working it free with repeated spring compressions can help. (C.P.R. lol) Others take a q-tip with polishing compound and work on the seat a while.

Check your offending float by seeing if it stays floating after being submerged a while. Then check the flap the float valve hangs on for wear marks or a groove or something to cause it to stick out of position so the valve is getting wedged open.

Did you torque the seat down on the aluminum washer? I thought I had good “wrist” torque wrenches but after chasing a leak a few times with brand new OEM floats. I put an inch torque wrench on mine and it tightened quite a bit. It could be leaking past the washer and not the float.

Others buy a new OEM.