Carb questions, and anyone got a parts carb?

Ok, I'm in the process of cleaning my carbs so I can finally start riding again, and I ran into a problem. On the float bowl, there is a cast passage from the gasket seal down to a hole that opens into the bowl. (from the Haynes manual Im guessing this is the feed for the cold start enrichment jet) On my #4 carb, this passage is blocked. I tried shooting carb cleaner and compressed air through it, and even tried poking through with a very fine drill bit. However, the drill bit had some little metal shavings stuck to it when I pulled it out and it is still clogged. I'm confused now -- Is this a jet or a passage inside there? Should I just put the bit into the drill and run it through? Or is there some kind of metering involved?

Which brings me to my next question -- if theres a jet in there and I ruined it, can it be replaced or do I have to get a new bowl? And if I have to replace it, does someone have a parts carb that theyd be willing to sell me a bowl?

Thanks,
Matt

 

I believe it's a non replaceable jet that's built in to the bowl.
I've heard say not to poke around in there.
If you must put something in there to clean it use a bristle out of a nylon brush
Yes it is a metered jet. It's the starter jet passage.

 

Aaggg, that is one bitter pill to swallow Taz! I have a set off of a '81 Seca 750 with buggered air/fuel screw seats, but they are still packed away. I'll be a while getting to them. I hope somone else can pull out a unit for you.

 

Hmm, that sucks. Well, being that its the outer carb, it should be relatively easy to remove the bowl without having to take the whole bank out again, right? and since it's only the starter jet on one carb, and the main and pilot jets are fine, will I be able to run it as-is for now till I can get the new bowl? It wont throw off the synch or anything, right?

 

It should only affect the mixture while on choke.

Can you get air through the tube at all?

Nachoman

 

I don't know of anyone damaging this jet before so I don't know how it will affect the bike. I spectulate it may only be at idle that you have problems and that with the choke out. I would dip the carb bowl in carb dip and then blow out with compressed air. Then try it on the bike. The compressed air is the way you should have gone with the clog. When cleaning carbs , compressed air is your friend! When you place the bowl in carb dip make sure the gasket is off. If you have the rubber type it will eat it up. If you had the drill bit in a drill then the jet is most likely damaged. If you were just poking in there with the bit in your fingers then I would think it could be ok.

 

I did try compressed air from both ends of the passage with 150psi (and a rubber tipped blowgun to ensure a good seal) and no dice. I didnt have the bit in the drill, I just tried poking through. But I did wind up with some metal shavings which is why I think I damaged it. (It was only a .050" bit).

 

Get a length of copper phone wire and try poking that around in there. Just might work. Here's to hoping.

 

Well I have a float bowl, with the same problem.

Tried soaking in engine degreaser, paint thinner, and carb cleaner (not all at same time).

Tried the copper phone wire, too soft, too large in diameter too.

I found out that a wire pulled out of my wire brush, is stiff enough and is the right diameter to push through the nozzle from the top edge of bowl.

Hope this will help you with your problem, if not, I do have this freshly cleaned bowl available!