Can do vs should do stuff. Drilling everything to excess like that isn’t uncommon in older race/performance builds. When it was all analog seat of the pants dyno, perceived benefits couldn’t always be separated from reality.

The difference between flywheel effect on my stock flywheel V7 Sport and this CX100 with seriously lightened flywheel is really noticeable- feels more like I’m riding/downshifting a Ducati when I’m on the CX100. It’s not how I’m used to a Guzzi feeling.
The welded-in pushrod cap is possibly a remedy to hasty transmission r&r activity like you may do when racing. If you don’t seat it properly during assembly and it then seats itself while you’re riding, you get so much free play that you suddenly have no clutch. This scenario can also happen at home when you were usually drunk & working on your bike in a hurry….