Have only had one issue with a crank case, and all parties very strongly recommended not to replace 1/2 case....but that was on an experimental airplane. If I have an issue with an engine, much rather it be on a bike, but still want to avoid that, especially at the wrong time.
2013 Suzuki DL650
Farkles: Givi V46, V35 and racks, Rox riser, Madstad brackets and screen, Givi crash bars, tank pad, Rick's fork brace, mirror extenders, Side stand plate, and Auxiliary shelf, Augustus deflectors, Seat Concepts, Givi Skid Plate, Enduro Guardian Highway pegs, Wolfman Explorer Lite tank bag, Barkbusters VPS
IBA # 35452
2003 Honda ST1300 Sold
1999 Suzuki Marauder Sold