CL77 carbs just flooding, Plugs back and wet

[CFL]

Perhaps someone out there can help me. I have tried everything to set the carbs. I rebuilt the carbs with to keyster kits. 130 main and 39 idle jets. I even reset the floats a 25mm, I changed the needles to the highest point. No change, Bike starts without a choke and when moving the choke there is no effect. I checked that the float valves close when I lift the floats. Still no effect. I have read all that there is on the forum too. Timing is OK as far as I can set them. Any help would be a life saver, Many thanks, CFL

[Snakeoil]

I'm struggling here to understand how the plugs can be wet and the bike runs. Is it running on both cylinders? Are both plugs wet? I ask because there is no way the bike would run and the plugs would be wet.

Unless your problem is oil and what you see are oily soot deposits, not unburned fuel.

That said, if you are running very rich, make sure your floats are not hanging up. They can drag on internal parts or the bowl gasket.

If you are running rich, you should have black smoke coming out the exhaust. If you have, you might have a worn needle jet. Keyster kits by the way can have parts that are not properly sized. I've not run into this, but others have reported this.

You need to post more details on the symptoms. Hard to figure out a problem if the symptoms don't make sense.

regards,
Rob

[CFL]

Thanks a million Rob, I rebuilt the engine, it was rebored. I measured the cylinders and rings. Their in specs. There is no blue smoke. This morning there is gas coming out of the overflow tube on one carb. When I run the engine, the exhaust gases burn my eyes. I am going to tear down the carbs today and go through them completely again. The choke has to effect on the engine when it is running. I can see wet cylinders when I pull the plugs. I understand excessive gas it not good for the cylinders oil coating. I'll post again after I go through the whole thing . Many thanks, CFL

[Snakeoil]

Gas coming out the bowl overflow tubes means the floats are either not set correctly or they are sticking.

Floats sticking will cause the bike to run excessively rich and chances are that the choke, which controls fuel to air mixture by regulating the air flow, will probably have little effect since the gas is being pushed into the carb by head pressure from the tank.

Shut off the petcock and I'll bet you it clears up and runs well until the float bowls run dry.

I suspect that you are seeing wet cylinders when you pull the plugs because when you shut the bike down, for the last few revs with no spark that gas continues to pump into the cylinders due to that same head pressure. It really has nothing to do with actually carburetion. It's the float setting, the floats leak and are sinking or the floats are sticking.

So, you could drop the bowls with the carbs in place, but it's a bitch to get the float valve back in place with the carbs mounted. So, it might be worth it to remove the carbs and remove the bowls. Remove the floats and listen to see if there is fuel in them. Could be just one side of the double float. I had this problemm on my CL77 and only one side was leaking. I went the extra step to weight the floats from both carbs to compare and needless to say, the leaker was heavier than the non-leaker.

If the floats are not leaking, install them and make sure they do not rub on anything in the bowl. put the gasket in place to check it for float interference as well.

Check the float height, too. I'm better you have this right it is is either a leaker(s) or sticking.

Just had a similar problem on only one cylinder on another site with a Brit twin. It appears it was crud up in the float valve seat that was preventing the valve from sealing.

regards,
Rob

[CFL]

Sir, Rob, thank you for the advice and the reply. I changed to needle to the float valves. The spring in the rebuild ket was stiffer than the old ones. Ran the bike and no change. Still putting out too much gas. Got a new problem. Forgot to put in a cotter pin to the holding arm on the rear hub. Hit the brake and broke the hub and the cable. I will learn not to rush the job. Many thanks for your advice. Sincerely, CFL