landing gear on a fazer

[His Dudeness]

I would say electric has to be the way to go.
pneumatics will need a store of air, so a reserve tank, way of charging the tank compressor and associated PTO from engine/gearbox to drive compressor , condenser/air dryer,
And that's before you start work on the legs.

If you do go pneumatic route will you be going with air pressure forcing against spring pressure to lower the legs, kinda like truck spring brakes where air pressure holds brakes off, so if there is an air failure  the brakes are applied, or in your case air failure raises the leg.
or air actuation in both directions.
Spring pressure dropping legs if there's an air failure, I haven't decided if it is a bad of good thing yet may be good if the spring is sufficiently soft to allow bike to lean into bend without tripping it up.
The geometry of the wheel and leg would have to take into account the possibility of drop at different angles of lean.
But then again soft spring pressure may not be enough to support bike and rider

I'm just thinking out loud  :\
Lot of stuff to think about, I wish you luck 

Excellent post there sunny! Theres a lot to chew over alright. The fail safe is a tricky one. You could make a case for landing gear up and for landing gear down and both would be valid so I'll have to think about that one carefully. As for electric vs pneumatic. The electric is definitely simpler as it should run directly off the bikes charing system but I have been watching a lot of videos on them and they seem to extend and retract quite slowly compared to the pneumatics. I'm only at the start of the project so I'll have to way up the pro and cons of both systems. I did see this pneumatic system which looks like it could work on a bike. But i'm hoping to talk to a pneumatics expert during the week and I'll see what he thinks. Here is the system its not exactly what I would need but it gives an idea of whats possible