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Carb rubbers question

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JezzaPeach:
I did mine recently and had taken out the filter box to move the air box back slightly. I took off the clamps at either end as it helps the rubbers squish, a trace of red rubber grease in the rubbers, and worked the front on first then upwards at the back bit by it. Pushed all on firmly (rubbers were soft) and clamps back on. Fired up instantly!

Oddjob:
Fit new orings on the manifolds. Bitch to find they leak after fitting.

exvalvesetdabbler:
If there is some doubt if they leaking on the engine side of the carbs, spray some WD40 on the joints with the engine running, you will hear a change if they are sucking in more combustible material.

Regards
Dave

Gromitdog:
Hi Pete
I have found If you put some lube on the engine inlets as suggested then put the air filter box in you can gently slide the carb bank in from the R/H side of the engine and up onto the rubbers on the inlet sides its not easy  ( charioteer building is how I describe it 😂 ) when they are on put a towel under the carbs to hold them up in place but the towel still gives you some up & down movement then move the air box fwd and starting with he middle rubbers squeeze them in half and tease them in to place. I then slave in the air box bolts in to give the correct height then fit the inlet jubilee clips and nip them up then fit the air filter to carb jubilee clips and nip them up. Then nip up the airbox to ensure it's in place with a tiny bit of movement .
Double check the rubbers are all sitting nicely if so do them up fully and then do the same to the air filter box.

Its certainly not easy when fitting new rubbers, But its easier the next time as the will have shaped themselves

Good luck Nige

deltarider:
Since I had 4 new OEM boots (carbs<->engine) lying around in their plastic bags for decades, I did something against my principle* and have removed the 4 that have been on my bike since 1976 and have served over 140.000 kms. All 4: no cracks and all 4 100% still airtight. Carbs have been of 3 to 4 times in 45 years. This is proof that if you have no indication for airleak, you can reuse these boots. They are robust and quite thick.

* which is: don't fix what isn't broken. I had no indication for any airleak.

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