Join Date: Sep 2006
Location: Austin, Texas, USA
Had this happen twice on my high mileage '85 K. The shift drum/shift fork is really worn at the points where the 1-2 shift is made, not letting it fully engage the gear dogs. The engagement dogs edges will round off from slipping in and out of engagement. If you drain the trans. oil you will probably see a lot of glitter in there, like a metallic paint job. The only fix is a rebuild or a replacement. Replacing bearings, seals and worn parts will cost $1000+ doing the work yourself (at least the last time I did it). The parts are an aluminum alloy with a anti-wear coating that once it is worn through, the failure is pretty quick. Sorry for the bad news.
'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