My '85 K100 has been shifting "different" lately. Clunkier when cold, and missing shifts more often. The clutch splines were lubed less than 4,000 miles ago, and the tranny oil was changed at the same time. The other day I thought to check the level of the tranny oil and found this: see attached.
The gear oil (Valvoline 80-90) is white, frothy, reading at twice the maximum level, and the consistency of a very wet cappuccino (hey, I'm from Seattle). By the way, when I took this picture I was just back from a 45 minute hiway ride in high forties temperature, but the oil looked the same this morning when checked cold. Also, I do have minor weepage out the drain hole under the transmission, but according to my searches this isn't uncommon in K Bikes.
I will, of course, drain and replace the gear oil as soon as possible, but any thoughts would be appreciated!