Evo Sportster project started October 2024,

After receiving quite a few requests for a good CAD
model of an Evo Sportster drivetrain, I bought an empty
unit from 1990 and will show the whole process here:

 

I was missing the primary cover and starter motor but was able to borrow these thanks to Erwin Jeppie, so I scanned both and already postprocessed the primary cover. Starter will be next. Scanning the primary was about 1 hour, postprocessing from STL to CAD about 8 hours...

I did a few quick Keyshot renderings below:

Next will be the starter and the cylinders