Join Date: Jun 2007
Location: MINNEAPOLIS, MN, USA
1990 Bmw K100lt Drive Shaft
Thanks so much for the quick responses to my question. I have put off the drive shaft maintenance for too long. Last summer I noticed a slight clunking when shifting if the shift wasn't smooth. I have worried that the splines on the transmission, drive shaft and the final drive would be damaged. As it turned out the transmission and the final drive splines were okay. The final drive splines were worn a little bit more but look very good for 60,000 miles. The splines coming out of the transmission were excellent. I bought this bike in 1993 with 13,000 miles and I don't believe the splines were ever lubed. I was worried my neglect would cause damage but all of the wear was on the drive shaft splines and the U-joint was sticking on one side of the joint. It looks like a new drive shaft will bring many more miles of travel for my bike. I have planned to do this operation for about 3-5 years and finally it happened this spring. I hope after my new rear shock comes in today or tomorrow, I should be able to fire it up this weekend.
Also, just a little info on my bike. The original shock on my bike was the best stock shock installed. It worked well for 16 years when last fall one of the drain screws just fell off on the road somewhere and when I stopped for gas I noticed a huge pile of oil streaming down my rear tire. It was hydraulic fluid from the shock. I have ordered a Progressive Suspension shock (3/4 inch shorter) and hope it works good. I had a hard time even finding an aftermarket rear shock. BMW wants an arm and a leg for their shocks. I am curious what others are getting for replacement rear shocks.
Thanks again for the info. I have recently found this website and it seems like a great way to compare notes, experiences and information.