Well, I hope it provides some reading entertainment for you Gents. Afraid a simple 'Oily Rag' refurb has escaped me again Norm.
The cylinder had to have the various bits removed from it. Luckily, the completely blocked Decompression Valve relented ok and the bypass tube plug in the head undid,
but the eroded exhaust flange nuts had to be cut and split-
While still dealing with the Cylinder bits, I had to start searching for somewhere to have new Rings made. A few hours interweb searching later, I'd found reference
to a restoration of a 1922 CWS Federal Motor bicycle. It had the same engine as this one and reference was made to an engineering firm that did all the work including making new Rings!.
So I fired off an enquiry and received a good reply with price estimates for each item of work, i.e, a cylinder hone and 3 piston rings to fit.
Long story short, I built a strong protective box to transport the parts and to return them in it-
Disappointed to say the least after receiving an email saying 'all done' and sorry for the cost/charge as was more difficult than he expected!.
When it arrived, all they had done was to make one piston ring!.
They left the 2 old rings on which I sent for their pattern reference, did not hone the bore and charged double for one ring.
So with fingers burnt again (as some here will know) from remote commission work, despite endorsements, my faith in British engineering firms has diminished completely and will now only deal with 'face to face' arrangements.
No option but to proceed and have faith that the wear, although greater than stated limits, will be ok for it to run ok. The point being that it has been fully de carbonised and so loses some assistance the carbon can offer in compression retention.
Onward's we go, and started the servicing of the De-Comp valve. Solid with carbon and parts rusted away. Cleaned up and made new clamping screw for the lever pivot collar and pivot pin-
Valve seat and face cleaned up ok and only needed lapping with scrapings from p600 emery and 'T' cut. New valve nut, 1/16" cotter/split pin and will have new copper washer.
Lever pivot hole egg shaped, so bored it out larger and fitted a bronze bush (not in pic).
Next job was to obtain the correct type of bronze rod for the small end bushing................................... T B Cont'd