After all these years I learned that the plastic vent cover on top of the final drive may have been responsible for the leaking grease seal at the input shaft I've noticed from time to time . After a good ride on a 50 degree day there was more of a stain around the rubber boot than I'd ever seen so I figured the seal had finally given up , but while cleaning the mess I noticed the final drive's plastic vent cover wouldn't spin freely, so I gave it a twist to unfreeze it and took it for a good ride and it didn't leak . So I guess I'll just give that plastic cap a twist every now and then to make sure it's able to vent the pressure that builds up when the final drive warms up.
We all probably need to vent from time to time!
Final Drive Vent
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Re: Final Drive Vent
Good tip. My current Rockster has the telltale rubber boot stain, and the bike is still low miles. Will check the vent.
Rockster#2, K1300S, S1000R (for sale)
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Re: Final Drive Vent
That vent has (or should have) a foam filter. Years ago my bike fell over and I later realized that filter became saturated with oil. Started seeing FD oil seeping out of the vent after the Fd heated up. The oil saturated foam would not let the pressure vent and as a result oil pushed out. I removed the foam, washed it out and reinstalled. That ended the problem.
The Older I Get, The Less I know. (in honor of MikeCam
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'04 R
'03 R
CB750
KZ750
HD 350 Sprint
Re: Final Drive Vent
That's good info. I removed the vent cap a few years ago to see if there was a filter in there, but there wasn't. I figured BMW would've put a filter there (being Germans and all), and am happy to learn they did. I'll find something to keep the dust out.
BTW, I dropped the bike on it's right side a few months ago when a newbie pillion bailed off the right peg before I had both feet down.
Didn't think about that maybe plugging the vent cap till you mentioned it. Thanks!
BTW, I dropped the bike on it's right side a few months ago when a newbie pillion bailed off the right peg before I had both feet down.
Didn't think about that maybe plugging the vent cap till you mentioned it. Thanks!
Rich
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Re: Final Drive Vent
How does the cap come off? Does it just unscrew?
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Re: Final Drive Vent
Good news! Who doesn't love a simple fix ?
Re: Final Drive Vent
Just takes a good, hard tug straight up.How does the cap come off? Does it just unscrew?
Rich
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