been runnin TUBED weathermans on the vespa for a while NO problems whatsoever , love 'em .... BUT before you go down the Tubeless weatherman route there have been issues with schwalbe tyres ...you might want to check this out before you make up yer mind
been running weathermans and sip tubeless rims for the last 2 and a half years. not had any issues so far but remember tyre pressure is different to normal. Mull - club shop has both sip rims and af rims and have weatherman sportsman raceman tyres.