Hello.
Both your bikes are wonderful machines when mechanically sound, i am familiar with both, the ES2 is one of THE GREAT ENGLISH singles.
79 T140 owned from new
89 Guzzi Cali lll owned since the late 90's
2 x off 84 Yamaha ty250 mono trials bikes
All very non std.
69 Boxford VSL lathe fully tooled
73 Tom Senior M1 with the quill feed head
79 Boxford 8" shaper
and all the usual… inc linishers, grinders, welders, pillar drill, T&CG etc etc
For m/c work i would say a big thing is spindle bore size, you want minimum wheel spindle size up there.
Regards.