I am just working on my CO engine and the barrel needs a rebore. I am looking to put the engine back to standard and working on tracking down a piston. Can anyone confirm if the CO engine is the same as the Model G ? Thanks Richard

Yes Richard, The CO piston is the same as a post war Model G (#28593/+) and everything you need is at Hitchcocks.
https://www.hitchcocksmotorcycles.com/partsbook-pages/903#page-903-position-7

The Bullet pistons are slightly higher compression and I've fitted those to both my WD/CO and WD/G.

Ron

email (option): ronpier@talk21.com

Hi Ron thanks for the info I will drop Hitchcocks a line.

Cheers
Richard

Richard I have a brand new genuine Hepolite std piston in it's box and I'll be a lot cheaper than Hitchcocks!
REgards, Mark

email (option): trials59(AT)yahoo(DOT)co(DOT)uk

Hi Mark, did you receive my reply about the handbook?

Ron

email (option): ronpier@talk21.com

Ron, I missed it, sincere apologies. I am having a clear out of mostly post War Enfield parts (I've told you about the bits I have that might interest you,) and I have been inundated with emails! So yes, please Paypal me at the usual address.
REgards, Mark

email (option): trials59(AT)yahoo(DOT)co(DOT)uk