The Royal Enfield idea of running caged rollers directly onto the main shafts leaves a bit to be desired in my opinion. I've just rebuilt this 1938 500cc engine where the main shafts were badly marked. Darren supplied me with needle rollers and hard sleeves for the shafts and my mate John turned up the OD sleeves for the crankcases.

Jan gave me a specially made big end pin which again Darren provided the needle roller for.

I have also recently noticed that Hitchcocks are now offering needle roller main bearing conversions for C and CO engines.....Sounds like the way to go. Ron

email (option): ronpier@talk21.com

A PES Big End Liner pressed into a M20 Conrod.
The liner has been honed to suit the pin.
Also shown is the silver-plated hardened cage roller bearing and thrust washers.

https://pesltd.uk/?product=66-0483A



Mark

email (option): pes.sales@btconnect.com