So I got a stock filter box installed today...

[Crage]

I taken the exhaust off 3 times now, no probs. (I replace the oil pan gasket)

I'm pretty sure my bike doesn't have manifold o-rings, just boots.

That explains what I'm hearing from the exhaust then.

 

[TheCafeKid]

I taken the exhaust off 3 times now, no probs. (I replace the oil pan gasket)

I'm pretty sure my bike doesn't have manifold o-rings, just boots.

That explains what I'm hearing from the exhaust then.

If you don't have those clamps on your carb boots it'll suck sir around them and that will also cause back popping when you close the throttle.

 

[Crage]

Got clamps on the list.

 

[7981GS]

No intake manifold O-rings just the tubes and clamps like the 1100 4-valve engines.

Eric

 

[Crage]

I have not actually taken the carbs off yet but the boots appear to be in good shape, I can squeeze them and feel that they are pliable

 

[7981GS]

Check for cracks under the clamps and where they cut into the rubber.

Eric

 

[Guest]

The rubber boots on your bike are 30 years old, if they have never been replaced just do it now. I'm doing it on my bike rehab now and my boots have been changed out though about 13 years ago. They have started to harden up and have developed some cracking as well again. I'm changing out the air box boots as well.

 

[ty998]

I am very interested in this post. Getting ready to put airbox onto my '81 GS650 GX. PO did not jet bike and had pods on it. Hope you are able to be riding soon Crage! I noticed that my idle was barely cracked open for the current setup (with pods)

 

[Crage]

The rubber boots on your bike are 30 years old, if they have never been replaced just do it now. I'm doing it on my bike rehab now and my boots have been changed out though about 13 years ago. They have started to harden up and have developed some cracking as well again. I'm changing out the air box boots as well.

Well I've finally gotten around to pulling the carbs. The intake boots appear to be fine. I'm pretty sure they have been replaced, as they are all 4 soft and pliable. The carb to airbox boots, on the other hand, are hard as rocks on the bottom ends of them. It seems that gas has hardened them on the bottoms. I'm going to try boiling them, if this does not revive them I'll be ordering new ones.

The carbs didn't appear to be very dirty inside. There was quite a bit of crud in the main jet though. They have definetely been pulled apart before, I had little to no issues getting any screws, jets, or seats out. I could also see that screw drivers had been used on the slots before.

Anyways I'm giving them all a 24 hour soak so I know I'm starting at ground 0 with them. Carb #1 is on soak now!