Classic motorcycle

pauly v.100 said
Pretty sure BSA and Norton also use whitworth threads.

Not british, but my project is a 1979 Yamaha RD400 Daytona Special that I'm installing front and rear suspension from a 250 Ninja.

I loved riding my old RD400 Daytona during the mid eighties it was the perfect city bike , that air cooled 2 stroke would smoke all my buddies on their Honda 750-4s and Kawi 650s , I was thinking o looking for 1 to play with recently