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After the Air Clearner its now the carbs - should I re-build

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keithtraffic:
Thanks all for the advice - will definitely see if I can get away with not separating them!

keithtraffic:
The saga continues!

On closer examination, as well as weeping fuel from the bowl seals it became clear that there was a major issue with the seals for the fuel tubes between the carbs - the tubes were really loose and the seals were hardly doing any sort of job, so I decided I would have to separate the carbs to check them out and I have now confirmed that the seals are badly perished and will need to be replaced.

So now that the carbs are separated I have taken the opportunity to have them vapour blasted prior to reassembly and have brought the aftermarket refurb kits from David Silver as mentioned in my earlier posts (https://www.davidsilverspares.co.uk/parts/by-part-number/partnumber_PCRKCB550K3/)

But it seems nothing is ever simple with these carbs :-[

The kits have arrived and the packaging identifies they are for the original carb part number 16100-404-004 which is the part number identified in the K3 parts list as being fitted to the K3 (so a good start). Having done a close visual inspection and a dimensional check as best I can, the parts seem to be the same as the original except that the hole pattern on the emulsifier tube is different to the original - does anyone know if this is critical - the patterns look quite specific so my first thought would be that they are there for a reason and should be the same? (I can post a pic if that would help).

The second problem is that, now the carbs are apart it seems that there are rubber 'O' rings fitted in groves as shown below (one each side of each carb), but I can't find any reference to them in the documentation I have - nor do they seem to appear on CMNSL or the K3 parts list - does anybody know about these - their sizes and a source (Once the carbs come back I can take one out and measure it but if there are no replacements available I don't really want to do this - although at least a couple of them look in a poor shape!

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Any further help on this welcome!

Bryanj:
The only way to sort that is by measuring one im afraid

Johnwebley:
Keith.

There is an engineering store called Hayley Group.

They supply O rings

Various sizes and qualities.

Check if you have one locally.

The Hereford branch is very helpful.

Used to be able to get stock over night.




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