Final Drives- How Crazy is this?
So, the thing about the final drive that BMW NA DID admit is that there is <insert whatever material here> inside the early final drives from manufacture. What was once considered by them "lubricated for life", then was changed to "change at 600 mile check" to eleviate that material. Since then, no real consensus stated from BMW about how often to change, but they added drains to do so.
The reality is that my '06 has only 16,640 miles on it, and only it's third final drive fluid change-
* First at 1200 miles (bulletin came out after I got the bike)
* Second, about 6,200 miles ago
* Third, about 150 miles ago (first time performed by me, results of which were just analyzed by Blackstone as having high iron and chromium and looked nasty)
What I was hoping to adopt,was an "annual" change like I have had for nearly 25 years with my K100RT (which incidentally lost it's final drive bearings at around 68,000 miles, so this is not new territory for me....)
But how crazy is this idea? (Grif, Meese, et al- chime in please)
If the dumb final drive "has something in it from manufacture" and changing the drive oil is supposed to somehow assist in the process, I defy how .66 liters of oil over 16,000 miles is gonna help.
So how hard is it to take the drive all the way off, put it in some kind of tub with the drain plug out and obviously the speedo sensor plug, and flush the #$%#$% thing out using, say, about 2 gallons of gear oil? Hook up a pump like a parts cleaner, and just flush the hell out of the thing with a bunch of clean lube?
I know I've read articles "hypothesizing" about incorrect bearings used, incorrect bearing torques, faulty seals, but the ONLY thing BMW admits to is that there is udesireable stuff in the things from the beginning.
Why not take 'em off and flush 'em REALLY good? It just seems to me a paltry .22 liter at a time every year ain't gonna do it...
Opinions? Has anyone actually done this? I just might. Seems like a cheap, albeit inconvenient, attempt at helping the issue. At least I'd personally like to see the thing drain clean fluid BEFORE I put new stuff in....
Just my thought..