Right,Miguel.But these are definitely different from a Minarelli or Franco-Morini,which are very similar.These expand a rubber washer like the Garelli of olden times,I think.That's how the starter clutch engages.I may e-mail twein@bright.net and ask Tony Weinfurtner about it.He's only 44 miles south of here at Ironton,OH.He's also a Tomos dealer.I've been meaning to `ped down there and see him,but I can 't pull some of those awesome hills on Rt.93.I may find a scenic route some other way,but it would be a long trip.I haven't as yet received any answer from Davel,Sean,or DickR. about their findings.