MOTOBRICK.COM
TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: KCinSB on July 28, 2022, 12:05:49 AM
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Since I had the bike up on a lift, with the wheels off, I decided to take advantage of having it apart and do a drive shaft spline lube job. All was going according to plan until looking at the pivot bearings. The Left side cone/inner race has bizarre diagonal marks along with the common wear marks. That side is missing one needle, which allows the others to get sideways! Not good, so this will slow things down….. :dk :dk
I recall years ago changing these bearings on a different final drive, and discovered there was an after-market bearing set that had no needles, just a cone fitting into the pressed in race. Is that still available? Any comments on using them if so?
It just seems like BMW kinda dropped the ball on that design IMHO. It’s a big heavy bike, and single sided swing arm that puts a heck of a lot of force on those teeny weeny needle bearing that have such a small contact area to distribute the load.
Anyhow, can’t change the bike but need to get it fixed. Is there a place here that deals with the Bearing removal and install?
looks a bit tricky getting the pressed in race out and the replacement back in.
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The stock FD pivot bearings on K1100s are garbage. The plastic race that holds the needle bearings is worthless.
Here are several aftermarket alternatives:
https://www.beemershop.com/Merchant5/merchant.mvc?Screen=PROD&Product_Code=TRA11092
http://rubberchickenracinggarage.com/bushings.html
https://nushings.com/#/
https://www.motorworks.co.uk/final-drive-pivot-bearing-upgrade-kit-tra11094-1.html
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AHah! Thank you! I don’t know how you manage to keep all this info where you can find it again, but thanks for saving me the hassle! 🏍 👀
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For anyone following:
Found the tool that was made for this purpose years ago by my old machinist friend, long gone now. It’s been years, and seems to take me longer now, but I finally flashed on having done it. It’s really easy, and likely does not need any special tool like I have. Bearing comes out with tapping, plastic hammer, no big force was needed. I will get the solid, needle eliminator bearings ordered.
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AHah! Thank you! I don’t know how you manage to keep all this info where you can find it again, but thanks for saving me the hassle! 🏍 👀
So I chose the top item in the list from the BeemerShop. Very nicely made parts, that fit as intended, and expect good results. The supplied grease fittings used to inject Moly grease into the bearing is a step up. (Fitting is removed after service, plugs provided) So now,…. I need to find a source of Moly grease to use very rarely and want avoid a normal size grease gun dedicated to the seldom used Moly grease. Hope to find a small gun and cartridge at auto parts…….
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Here's some mini grease gun cartridges with Moly. Mini (3 oz) cartridges are usually sold in 3 packs like this.
https://www.amazon.com/CRC-SL3144-Moly-Graph-Pressure-Multi-Purpose/dp/B000CPCSNU
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For anyone following:
Found the tool that was made for this purpose years ago by my old machinist friend, long gone now. It’s been years, and seems to take me longer now, but I finally flashed on having done it. It’s really easy, and likely does not need any special tool like I have. Bearing comes out with tapping, plastic hammer, no big force was needed. I will get the solid, needle eliminator bearings ordered.
Nice shop!
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Ha! I see I have caused confusion. Was trying to give credit to my old friend that made the tool mentioned, Walter Docker, gone in 2014. That’s him standing by his lathe, in the basement, where I would find him almost every night. He made some hard to believe items in that little shop. One of the greatest generation. Him in 1938, on a home made fork flat track bike.
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Ha! I see I have caused confusion. Was trying to give credit to my old friend that made the tool mentioned, Walter Docker, gone in 2014. That’s him standing by his lathe, in the basement, where I would find him almost every night. He may song hard to believe items in that little shop. One of the greatest generation.
Got it.
I have had the pleasure to know and befriend folks like Walter. Those who could do most anything while readily teach and assist anyone who is interested.