Table of Contents
REF: Engine Mechanicals
Cover Mods - (Primary / Gearcase / Inspection / Sprocket)
See also Polishing Aluminum in the Sportsterpedia.
Inspection Cover Mods
Cam / Gearcase Cover Mods
The actual interior of the gearcase is inside the screw mounting holes.
So, any portion outside this area (minus gasket surface) can be cut off or modified without harming the seal of the cover.