wet sump solution 2

Got another call from a customer with a wet sumped Commando. The oil tank was empty and he was worried about starting it without oil pressure the first few seconds. I told him to add only a cup of oil and check the level later. Its also smart to add a 1/16" thick Oring between the sprocket and case so the main oil seal won't blow out. I'm running the O ring now in my test bike with no problems. Never use an anti sump valve unless its fool proof and connected to your ignition.

jseng1; Thank you for the o -ring suggestion. 56 years and never blew the crank seal but I like the 'belt and braces' idea. Mark

When ever I have done rebuilds and replace the main seal I put on a smear of JB weld to the outside of the seal has worked for me and I have only blown out a main seal once from too much oil in the crank while starting it, that was over 40 years ago and since doing the JB weld trick haven't had that problem since, but then my Norton has only wet sump 3x in the 49+ years of ownership, if it wet sumps I just drain it before starting it and I have never had any problems with pulling the seal out when its needs changing.

Ashley