... unfortunately one of our members used them and consequently had a blow out of the head gasket.
The issue has since been resolved and he thankfully provided a link to reliable (aka OEM) service manual based information of same.
Some may remember the "cease and desist" note I once got from RE lawyers for having uploaded manuals to the forum directly (or to my own google drive account) so I won't do that, but there is a link to said manual from elsewhere:
read this thread and scroll down to "Veloman":
www.royalenfieldforum.com
The issue has since been resolved and he thankfully provided a link to reliable (aka OEM) service manual based information of same.
Some may remember the "cease and desist" note I once got from RE lawyers for having uploaded manuals to the forum directly (or to my own google drive account) so I won't do that, but there is a link to said manual from elsewhere:
read this thread and scroll down to "Veloman":

Classic 350 factory service manual
Considering buying a 2022 Classic 350. I have seen some discussion threads saying that the factory service manual is not available from the dealer or from Royal Enfield itself. Is this true? I do all my own work on my motorcycles and always buy the factory service manual for that purpose. No...