how to adjust float level

[26667]

Is there an explaination somewhere, or can someone expalin to me how to adjust the float level?

The left (extremely carboned plug side) is obviously lower than the right(slightly carboned plug side). The fuel left in the float is 1/8" lower L than R.

[20774]

Lower fuel level in the left would mean a lean running condition. When you pop the float bowls after shutting off the petcocks, the height of the fuel in the bowl (measured from the center of the well) should be around 22-24mm.

There's a tang on the float assembly, between the two outside arms. Bending the tang will adjust when the float pushes on the needle and then shut fuel off. Experiment with the tang to get the right amount of fuel in the bowl.

The tang can probably be bent with the floats in place...don't get too hamfisted. Otherwise, you'll need to remove the float. There's a pin that holds the float in place. It's got a knurled end to it...it should only go out one way...I can never remember which wat:dunno

Also if you remove the pin, be careful not to put too much pressure on the carb body tangs that hold the pin. Don't want to break them off...that'll ruin your day!

[26667]

one more try. I thought that was about the deal but a little afraid to just jam a screwdriver in there.
Maybe I can get them adjusted till new alchohol-proof floats arrive from KS. I bet they're soaking up alchohol. We didn't chg them when we rebuilt the carbs.
Now i'm going to go soak up some alchohol.:bottle

[James.A]

This picture illustrates the method to set the float level on a Bing carb with the removeable float bowl on the bottom. The feature line of the float should be parallel to the bottom of the carb body where the float bowl would be fitted. The fuel level in this carb, as shown, would be a little low. This is a 26 mm mechanical carb (1-26-114) from an R50/5 that I mocked up and later installed on an R27.

[20774]

one more try. I thought that was about the deal but a little afraid to just jam a screwdriver in there.
Maybe I can get them adjusted till new alchohol-proof floats arrive from KS. I bet they're soaking up alchohol. We didn't chg them when we rebuilt the carbs.
Now i'm going to go soak up some alchohol.:bottle

I've heard mixed reactions to the alcohol proof floats. They take a bit to set up correctly...they were really designed for an aircraft application in which extreme angles were involved (ie, the aircraft banking). They're costly as compared to the regular floats. You lose the overflow tube on the new float bowl.

Here's some links to various articles:

http://bmwmotorcycletech.info/bingcv.htm
http://bmwmotorcycletech.info/bingcv-2.htm

http://www.gunsmoke.com/motorcycling/r100gs/carb_rebuild/index.html

On this last link, he shows the new and old floats. Bing claims increased fuel economy but I don't think anyone actually sees that. He also makes the point that without the overflow, fuel could leak into the combustion chamber and create hyraulic lock if you try and start it...that could bend a rod.

And for even more FUN!!

http://home.insightbb.com/~cdpumphr/the_carb_chronicles.htm

I've adjusted the tang with everything installed. You just need some needlenose pliers to reach in and put a bend on the tang.