Jabiru have been purchasing generic parts for some years simply to save costs.
Coils, pistons, circlips, valves, pressure senders, gauges etc etc
All of which have had QA problems. Pretty hard to hide say dodgy piston circlips as they simply come out then so does gudgeon. To even inspect is a tear down.
Valves heads come off. All of which result in engine rebuild or replacement and a seriously upset owner.
On top of this is the design changes and fixes, throughbolts, collets, spring washers,
There's SB about this stuff yet they path is continued.
Now they are forced to find new makers for key parts like cranks, rods and cams.
They are betting the future of the brand on the new engine and history indicates repeated QA problems.
Chinese can build good stuff for sure Bex but the reputation for shafting partners and shipping non compliant rubbish is well earned.