92KK 84WW Olaf
Life time member
Number of posts : 7953
Wirelic wrote:Hi All,
Yesterday I took a 25 mile ride on a new to me 1992 K100RS. After the ride, the final drive was quite warm, almost hot, but I could hold my hand on it. Brake rotor was cool, swingarm was cool, oil level in final drive was up to bottom of threads of fill plug hole.
Is this normal? I’m not that familiar with the K bikes. If not normal, what might be a cause? Thank you.
My good friend who passed away over a year ago was a local BMW tech. Whenh e retired he still bebuilt final drives for them.
His avice always was keep good oil in them, but also keep an eye on the temperature. They do get warm as a matter of routine BUT getting hot quickly was a sign of the big bearing on the way out. He could rebuild them at that point very quickly. The next step is the seal fails.
My first K1100 did a specatcular fail, came back from France, on the way back from the ferry, an 8 km journey, I stopped at a supermarket of supplies, then 2km home. All was good at the supermarket, but in those 2km home the seal gave out. I parked it and took another bike instead. So I rode it another 15km to a friends place and in that 15km the bearing race spat out the dummy but I got there.
For now, change out the oil, have a good look at what comes out and keep a very close eye on the temperature.
You may be ok. My RT monolever did what ours did and ran another few months until the seal leaked and bearing was gone.
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1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles.
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles
Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500