no weld

[robertgibbs]

Is there a way to mount an engine on this bike without welding, and if not whats the simplist way to weld the mounts

[Venice Motor Bikes]

Look at the thread of this bike I built... I did it all without welding.
I'm sure you could do something similar.
http://motorbicycling.com/f15/venice...lade-4649.html

[robertgibbs]

how are these mounts

[Venice Motor Bikes]

It looks like those mounts will allow the front of the engine to shake up & down & maybe break the rear mounting studs.
I would lower the engine in the frame & use thicker steel for the front mount & aim it (the mount) down to the lower part of the down tube.

To get the engine lower, you can use a second chain tensioner to make the pedal chain go under (or over) the engine.

[robertgibbs]

New Front Mount Trial

[Venice Motor Bikes]

That looks pretty solid! One more suggestion... Weld that small front mount to the large bracket to keep the engine from twisting side to side.