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Old 02-01-2012, 09:32 PM   #16
bmweuro
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Quote:
Originally Posted by supershaft View Post
The famous spline lube? Does your clutch have grabby engagement? If it doesn't, it doesn't need the splines lubed. Regular spline lubes are probably the biggest waste of time you can do for yourself since they don't help the bike. In my experience from working on tons of airheads, chances are highly likely that your bike needs some other maintenance way worse. Sure, I do it when people insist. I happily do it when they need it but that is rare. It is usually after the bike has been sitting for a long while. That has a lot more to do with grabby splines than mileage. Spline wear? I have seen just as many worn splines on bikes that got regularly lubed as not. Personally I never lube mine other than when I have my tranny out anyway for something for three decades now and have never had any worn spline issues.

Oil pump cover? Always heat the bolts/screws before you loosen them. Some people put red loctite on them! Those threads are often buggered for whatever reasons including people over tightening them. Use the proper inch pound torque wrench. The threads often need cleaning. Clean them with a thread chaser or a roll tap. Do not clean threads with cutting taps because they remove too much material during each pass. That's my advise. Good luck!
Yep, I couldn't have said it better. Don't waste your time.
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Old 02-02-2012, 07:44 AM   #17
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fine guys! i'll forget about it!
hmmm, what else can i obsess over?
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Old 02-02-2012, 08:08 AM   #18
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......Obsessions over ATE brake calipers are always fun.
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Old 02-02-2012, 11:17 AM   #19
supershaft
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Originally Posted by apt13 View Post
fine guys! i'll forget about it!
hmmm, what else can i obsess over?
Your brain is working like an on/off switch. Lazy mode. Don't let it go there. Don't forget about spline lubes. They sometimes need one! But at the same time don't think it does need one when it doesn't. If your clutch engagement/disengagement isn't grabby, you don't need a spline lube. That isn't too much more effort than yes/no. Just trying to foster a good wrenching frame of mind.
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Old 02-02-2012, 11:46 AM   #20
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i'll be showing more of my "noobness" here, but can you briefly explain to me what a "grabby clutch" feels like? haha. sorry. please commence eye-rolling as needed.
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Old 02-02-2012, 11:54 AM   #21
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The lever isn't linear but rather extremely exponential.
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Old 02-02-2012, 12:49 PM   #22
disston
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Change the fork oil and or rebuild the dampners, align the tubes, replace steering head bearings?
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Old 02-04-2012, 02:00 AM   #23
Bill Harris
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Grabby clutch? Seems to engage a bit quicker that it ought to, or seems to chatter a little on engagement (pile on the subjectivity here). If the splines have never had moly lube applied, they'll probably benefit (IMO). One reason a clutch can be grabby is that the clutch plate does not slide freely under load on the input shaft. Moly lube is magic-- it contains molybdenum disulfide (MoS2) which is like little atom-sized ball bearings that (supposedly) actually embed themselves in the steel so the "dry lubricant" properties are still there after the greasy has gone away.

Do it once to a new-to-you bike to reset that maintenance item to zero. Pulling the tranny is a good bonding experience, lets you get up close and personal to check the clutch plates, the engine and tranny oil seals, the throwout bearing, etc, etc. Get that merit badge under your belt and you, too, can pontificate.
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Old 02-04-2012, 10:42 AM   #24
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Well guys, Yesterday I pulled my gearbox for a spline lube at 10K since the last one. The splines were clean except for what little bit remained in the valleys of the teeth. Bike shifted and the clutch action was fine before hand. Previouly used Lubriplate 3000 now used a 50/50 mixture of Loctite Moly paste and Wurth 3000. The Lubriplate has a min of 3% moly the Loctite has 65% plus moly. Thats why I switched.

My 81 R100RT has 161K miles on it. On Thusdsay I went to a dealer in Pittsburgh and on the service rack was an R1100S oilhead with trashed splines. Both the hub and the input shaft were gone....at 15,000. Was the cause, lack of lube due to age, no lube or an alignment problem, who knows.

Sure makes a guy wonder. Obviously I believe in lube. Having owned an antique airplane in the past, preventative maintenance is in my blood.
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Old 02-04-2012, 11:35 AM   #25
supershaft
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It surely doesn't hurt anything lubing them IF done correctly. I just thought of another thing lubing them often screws up besides oiling the clutch plate: Drive shaft bolts coming loose. Very related when you think about it. I know from seeing many a worn airhead input spline that has been lubed regularly that lubing them does not save them from wear. I also know from tightening down literally hundreds of drive shaft bolts that if you tighten them down correctly, they don't come loose. Without a washer they need nothing but torqued down correctly and they never come loose. Loctite won't keep them from coming loose. Tightening them down will although I think some need to use loctite in order to remember to tighten things. It helps in that way for some. In the mean time 100RT and others out there, my experience has me betting your bike really needs something else worked on way more than those splines. Not always! But most of the time.

BTW, dry splines do not mean they need lubed. Most greases go dry there very quickly. That's the whole point of using moly. It is a dry lubricant.

Now before someone gets the itching to come after me personally for insisting there is only my way and no other way. Try reading what I wrote above again. I am here writing another post to get a message out that I rarely read on the net. Bond with your bike in a meaningful way. That way it matters. Harder to do yes I know but isn't that the way things most often work?

On tightening the drive shaft bolts: I highly suspect that if more people got a torque adapter and used a torque wrench to tighten down the drive shaft bolts they would probably just then realize just how tight those bolts are suppose to be. Those are tough threads and bolts!
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Old 02-04-2012, 12:36 PM   #26
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[QUOTE=supershaft;17909410]

lubing them does not save them from wear.

Loctite won't keep them from coming loose. QUOTE]

Do pay attention to your own common sence before you follow such advise. Stupid is as stupid does.

If the clutch feels right, do nothing, until the inevitable failure or at least enough wear to BE a noticable problem. Now you are so far down the exponetial wear curve that lube won't help put off the need of new parts that cost a whole lot more than a dab of lube every 30k or so.

No journeyman mechanic gets beyond the apprentice stage without developing a FEEL with the wrenches. At 10,000 PAID hours, SOME can become masterful. Nothing like the same thing as hanging around the shop. Even they might strip a previously weakened Airhead thread and likely will if they are certified only on Catapillars.

I have been into hundreds of clutch splines, exclusively Euro. I have never seen enough input spline wear to need replacement. I do always lube the splines upon reassembly, and know how to easily and quickly apply enough and never too much.

All that said, an Airhead is safer in the hands of a DIY owner who works through the learning curve with the help of other Airheads as compared to any Joe's Auto in the hood. When you first strip that first thread and pay for the fix, the likelyhood of stripping another goes way down. And as knowledge develops you become much more able to see the stupid posted on the web.
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Old 02-04-2012, 01:28 PM   #27
supershaft
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Exclusively euro cars. Get back with us with some pro BMW factory authorized motorcycle experience like I do. After all, I can use some of those pro buzz words too. And on the subject at hand!! Yes, some of the learning IS counter intuitive. Hasn't all that car experience taught you that . . . . At least leave the personal crap out of it. I thought it is against ADV rules but . . . .

Once again inmates, getting out of piss's way is not pissing back. It's self defense.

supershaft screwed with this post 02-04-2012 at 01:35 PM
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Old 02-04-2012, 01:44 PM   #28
100RT
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Everyone has their rules and reasons for doing things. Not all bikes live in sunny dry climates or near the salty ocean air. Environment means rust and corrosion or not. The airhead will gets its lubrication as has been done in the past.
Ride safe
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Old 02-04-2012, 06:21 PM   #29
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From BMW, December 1984.

Lubrication of clutch splines:

We described in two previous Service Informatons {xx xxx xx (xxxx)} and {xx xxx xx (xxxx)} the importance of clutch spline lubrication.

Tests results where clutch splines are kept properly lubricated are extremely positive. Stiff shifting of the gear box and stiffness of clutch operation can be directly attributed to dry or rusty splines.

Lubrication of this area will greatly prolong clutch life, and we recommend the following lubricants only for this purpose.

XXXXXXX XXXXX-XX
and
XXXXXXXXX

We urge you to inform your customers of this essential once-a-year service.

Yours truly,

BMW of North America, Inc

XXXXXXX XXXXX
XXXXXXXX XXXXXXXX XXXXXXX
XXXXXXXXX XXXXX
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Old 02-04-2012, 07:21 PM   #30
jackd
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Well there it is in writing....
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