carbs leaking air?

Ok well I have not had time to mess with it in awile till now. I found that the carb boots are leaking. You can feel it if you stick your hand around the boot. I also shot it with some B-12 and it reved the engine up. My question is, is there any tips to getting the boots on really well? I had a friend clean the carbs and put new boots on. I have never pulled carbs off before and I am going to attempt it tomorrow. Also which one is the main carb?

It might be sucking air in where the boots and the head meet. You need to use some kind of sealent between the two. I'm sure some other members will let you know what kind. As for a "main" carb there isn't one I don't think. It is pretty easy to work on them.

so these boots are new??? I had the same exact problem with my boots but they are old and cracked... what I did was use high temp joining compound I picked up at the local harware store... it sealed the cracks and I put some between the block and the boots... vwalah like new.. at least until I get new ones. If they are new boots then it sound like the surface between block and boot may be dirty or the boots may be loose.... if not check your radiator clamps that go on the boots that hold the carbs they also may be loose.. my advice is don't worry about the carbs and how they work until I get the vacuum leak fixed

Yeah the boots are new. I was going to try and just tighten down the screws that hold the boots on to the block but You can not get to them with the carbs on. I am thinking that when the guy put them back on he just didnt get them to sit right. Hence why I might just pull the whole thing off and clean everything and see if I can just get everything on straight.

sound like a good place to start

I hope he didn't do what the PO of my bike did. He didn't quite get the #2 carb into the boot, and bent the lip of the boot over. So it naturally leaked.
Then he iced the cake by syncing the carbs, and adjusted the #2 carb to accomodate the leak.:pinch:

I installed new carb holders and had no problem. It's possible they are not tight enough but don't over tighten! Make sure you have a clean flat surface to seal to. Usually they are installed with vacuum ports down, with NEW holders the raised lip should seal ok.



Post edited by: Bluemeanie, at: 2007/10/18 11:03

Yeah I am up drinking my morning go juice. I am going to give this a shot today. Hopefully that will be a simple fix. I really don't want to get into synching since I have no Idea how to do it, nor do I have any tools for that.

ok I have pulled the carbs off twice now, im starting to be a pro at it. It is sill leaking but not at the boot to engine seal. it is leaking at the boot to carb seal. It is a new boot and i cleaned everything last time i put it on. Any suggestions?. I am thinking about going to the hardware store and buying new clamps to see if that would help.

Yes, you do have to clamp them! I'm still using the factory clamps, you can use normal hose clamps.

Oh I clamped them down everytime. I just went and got some new clamps. I am going to try a whole new boot since I have two extra and the new clamps. If that doesnt work I am going to set it on fire.

Is it possible that wrong carb holders are on? I believe 750's or at least 900-1000's have bigger carb opening so would have larger holders. Would LOOK the same but leak! On my new carb holders the carbs went in pretty snug!

Post edited by: Bluemeanie, at: 2007/10/18 18:16