Follow Up Report:
Lone Star BMW ended up installing two different sets of RH cam shaft sprockets to restore it to spec. That quieted the engine a bit but then the RH throttle body crapped out on me which was particularly nasty. Fortunately it didn't catch me in a bad spot of traffic.
I've had the bike back for a few days with limited opportunity to ride but so far it seems to be good as new. Enduro Pro mode still makes it a wheelie machine. Have yet to do a top-end run which will be limited in duration running the Twinduros with their Q speed rating.
"You don't take photos for yourself, you take them for the old man you will become - if you are lucky." - Falang
"As long as there's a horizon and I can see it, then I want to know what's there, mentally, physically and visually" - rtwpaul