Is the lubrication system on a single cam 4 stroke reliant on the strainer/magnet being in place in the gearbox or will it operate without, particularly the feed to the big end ?
It will probably work but you would be running your motor without any filtering & removing any magnetic particles. It's there for that reason. If yours is damaged buy another they were still available about 12 months back. But at the rate Husqvarna-BMW is discontinuing parts better get it quick.They have discontinued the kickstart shaft already which is not good.