Hardened gears probably, but you complain of metal shards on the flywheel. Thats why I suggested what I did. KTMs are the same thing, end up a big mess after some hours. The patent I beleive involved the horizontal positioning of the starter. Some guys have been doing a "wet conversion" on the orange bikes with good luck.
Look at the Beta RR drawings. The starter engages a gear on the flywheel, just like an automotive starter, no ring and pinon type setup. There appears to be no sprague clutch like a four stroke. It runs in the oil bath with an inverted type stator, mounted to the cover like a four stroke, so all components are sealed and lubricated just like the primary and transmission. Too new for life test but it makes complete sense and seems to perform flawlessly from all accounts.
The KTM and GG designs are just afterthoughts on old case designs and will most certainly disappear when those cases are upgraded.
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