How to replace FLOAT VALVES on motorcycle CV carburetors

Float valves I used (please double check fitment for your carbs): https://amzn.to/2BgaxAi

Have a rough idle? Carbs running rich? You suspect the float valves? Here's a quick little how to diy video showing you how to replace the float valves on a set of motorcycle cv carburetors.

The first thing we need to do before changing or replacing anything on the carbs is to drain the fuel from the float bowls. This is super easy to do and all you have to do is undo the fuel drain screws at the bottom of the float bowls and let all the fuel out.

Once that is done we can flip the carburetors over so that we have good access to the float bowls. Undo the screws holding the float bowls and remove the float bowls. This will give you access to the float and the float valve. Before going any further you can inspect the operation of the float and float valves by tapping the floats a bit. The floats have to move completely freely and have to be a bit bouncy towards the end of their travel.

To replace the float valves we need to remove the floats. The floats are held in place by pins. The pins need to be pulled out and then the carburetor floats can be removed. However, often there won't be enough of the pin sticking out so that you can pull it out. In this case the pin needs to be pushed out from the other side. I did this with a little screwdriver with a tip that I ground away to make it thinner and narrower so that it can fit into the pin hole.

Once the pin is out simply lift the floats up. The float valve will remain in the float in it's little groove, and you can simply slide it out of the float. This is a great opportunity to inspect the float valves and sets. The part of the float valve that needs to be looked at is the float needle which is the black rubber cone at the top of the float valve and it seals against the float seat. If you see any sort of ring worn into the float needle, even a very slight one, it's time to replace the float valves. When it comes to the float seats they need to be shinny, smooth and without any damage or scoring.

Once everything has been inspected the install is the exact opposite of the removal.

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