Cvk Keihin Carb Lines Id??

Hello all,

Cleaned my jets and replaced the carb bowl gasket. I have a fuel drip coming from somewhere above the float bowl. It was gathering on one of the bracket bolts and dripping on the starter.

I removed the carbs again and couldn't find the source. Center float bowl gasket is fine and not pinched. I need help figuring out what these lines go to? The swivel on some tube going in between the carbs (like the main fuel rail line). I circled them in red. Are these some sort of drain lines or do they recirc back to the fuel tank? I can't find any unused lines in the carb area. Any suggestions would be great.

Thanks,
Leo

 

Yes, found the Cal model and it looks like they are just vent ports for the diaphragm. I got a an upper leak and I am thinking it's the seals on the fuel swivel thing or a float needle not sealing. What do you think?

I hate that I can just find a full rebuild kit for the CVK. Like I said, I am new to triple carbs.

 

Went to the Triumph dealer during lunch. Tech said that possible float needle wasn't sealing, hence fuel going to the overflow (vent). Going to try that before replacing those fuel swivels, which they didn't have in stock anyways. Hopefully this resolves the leak.

 

Thanks for that. These are Keihin CVK carbs.

 

Ok all. Put in a new float needle on the center carb and ran a couple lines out from the 2 vents to behind the air filter box. No leaks while running. I left the petcock on last night and got leaks in the same area again this morning.

Is this normal for it to leak if the petcock is left on for hours?

 

Hmm, yes confusing on the wording on the petcock valve. I am used to them saying ON-OFF-RES. According to what you are saying, there is no OFF. So the vertical postilion, say RES (reserve) will always stay open? If so, the ON position is actually closed until vacuum is applied?

I only changed 1 needle as they are $25 each. Highway robbery, lol. When a normal full carb rebuild kit is about the price, which I cannot find for the CVK.

 

Hmm, yes confusing on the wording on the petcock valve. I am used to them saying ON-OFF-RES. According to what you are saying, there is no OFF. So the vertical postilion, say RES (reserve) will always stay open? If so, the ON position is actually closed until vacuum is applied?

I only changed 1 needle as they are $25 each. Highway robbery, lol. When a normal full carb rebuild kit is about the price, which I cannot find for the CVK.

Yes, mine was left in the vertical position all night and leaked. Now I am thinking the priming mechanism is faulty and letting fuel thru all the time. Ok, let me leave the "pointy" in horizontal pointing towards the rear of the bike as this position it never leaked.

 

Also, FYI, I didn't even know the petcock had this priming feature built into it. I really appreciate all these replies as I am learning something everyday.

 

No leaks this am. I am good to go now. Thanks for the assistance!

Leo

 

This weekend I am going to sync the carbs, then I can start putting plastics back on.