This hobby is infectious isn't it?
Not sure on what way you intend to hold the flywheel but good luck with it all.
Hello Cobba.
Been in a welding works at the moment presents no troubles in making a flywheel lock.
On the YB flywheel there are 3 holes for mounting a pulley. All I did was punch some holes in a bit of heavy flat stock. Welded on a bit of 50mm RHS and then bolted it to 2 of the available holes. When bolted on a piece of 40mm RHS is inserted into the 50mm RHS and hay-presto....special tool number 87 is born.
After this it was simply a matter of using my 2' stilsons with a 4' length length of cattle rail over the handle and the start dog was as good as off.
As for infections. Too late mate. Pills don't help anymore.
Cheers Scott
PS: I'll get a picture of tool number 87 when I get home.