Can anybody give me information on the journal sizes for a 340 engine please both main and big ends, original sizes and sizes once re-ground so I can measure mine and order the correct size bearings. +10/+20/+30 etc.

Just want to make sure I’m right, not trusting myself without confirmation. Many thanks 👍

 

the specs are in the MK-2 or S type factory service manual.

download either free from my website:

https://classicstypeparts.webstarts.com

 

Jim it is always good to hand a copy to the machine shop. With compliments from the WSM.

 

Thank you 🤗

 

Hi Friends
Well I have now measured my crankpin diameter at 52.95mm the book says it should be 52.98mm with a +0.015 / -0.00 next shell size 0.25mm / 0.010” question regrind or not? Regrind means total dismantling of engine but of course I will do this if required.