Join Date: Sep 2006
Location: Austin, Texas, USA
This has happened to me twice. A temporary "fix" will allow you to start the bike.
Engine off. Put in 2nd gear. Roll bike backwards quickly. (While seated for stability. A slight downhill helps considerably.) Pop the clutch to stop the bike. Listen to hear the starter turning backwards while popping clutch. It's a distinctive whirring sound. It might take a couple of attempts before the bike will start normally.
I think this forces the sprags into the outer ring and will wipe the crud out of the way temporarily. You can usually get several normal starts after doing this. My K100 engine started doing this while I was preparing the K11 engine for installation. This kept me riding until I could do an engine swap.
'17 R1200RS, 2 yrs. 27,000 mi.
'16 R1200RS, 18 mo. 28,000 mi. (gone)
'03 R1100S Boxer Cup Replika 6/200
'85 K100/1100RS, 34 yrs. 326,000 mi.
'05 R1200ST, 8 yrs. 57,400 mi.-3rd deer killed it.
'11 R1200RT, 2 yrs. 30,000 mi. (gone)
'99 R1100S, 2 yrs. 15,000 mi. (gone)
'96 Ducati 900SS/SP, 12 yrs. (gone)
500,000+ BMW miles