Everyone who owns an early K100 or K75 probably has seen the rubber Bump Stop for the Center and side stands:

These are fine as long as they work. But you see the two rubber nipples that hold them in place. To me these seem to always get ripped off leaving the bumper dangling and of no use. I've tried gluing them in place to no avail. And a new one is USD $32. which sorry seems a rip off to me. So when this last happened with Silver and I lost the bumper I found an old one which had had both rubber nipples ripped off and modified it by drilling a very small hole through the rubber and using 5mm. screws inserted through the holes and held in place with epoxy. The heads of the screws are buried in the rubber. Here they are



Hopefully these will last a bit longer.
best regards
J.

Nice fix - thanks for posting!

So I thought I had it figured until I found I had to clean the epoxy off the threads. Yeeech! And I pulled one screw out just cleaning it. So what I did was to put a washer under the head and then using a hand drill with a philips head drive on it and screwed the screw back into place. Then added epoxy behind the head. It was a brute force approach but it worked. Then under the machine to install it. That wasn't as bad as I thought it would be. But found that varied actions involving the muffler (the bumper mounts to the muffler) had pushed things off true. The side stand fits in quite comfortably. But the center stand isn't quite centered. Probably means the muffler is off a bit. BTW, as it turns out, I had worried what if the screw head isn't fully buried in the rubber. Not a problem. As near as I can tell it wouldn't make a bit of difference if the stands were resting against the screw head.

I just use zip-ties when the nipples of those bumpers fall off.  Quick, cheap and easy.

It's a ghetto repair but it works and nobody can see it so I don't care.

Any chance you could show us how you tie them on? Do you go through the rubber or just around the bits? Seriously curious. I agree no one is going to get down there and check. But does the fix hold or do you eventually lose the rubber?

jjefferies wrote:Any chance you could show us how you tie them on? Do you go through the rubber or just around the bits? Seriously curious. I agree no one is going to get down there and check. But does the fix hold or do you eventually lose the rubber?

No pics but I just put a zip-tie over the low point in bumper curve around the bracket on the exhaust. At first I was concerned that the heat of the bracket might melt the zip-tie but then I figured that if it didn't melt the OEM rubber then it probably wouldn't melt a nylon zip-tie either.

I've done this on a few Ks with no issues.

Ditto the zip tie solution for me  Used one big fat heavy duty one, no drilling.

Karl

Mine was hanging loosely so I removed it before I lost it. My problem is that I put it in a "safe place" until I got around to securing it back on the bike and now I can't find it!

MikeyD wrote:Mine was hanging loosely so I removed it before I lost it. My problem is that I put it in a "safe place" until I got around to securing it back on the bike and now I can't find it!

Done the safe place thing, myself. Question to the general public, But that $32.00 piece of rubber is a bit pricey to my mind. Has anyone ever tried making one from an old rubber Tire. Just to look at it, I think I should be able to whittle something out of an old tire.

A mate of mine used to get tubes of silastic that had gone off  and carve out bushes and bump stops. I've also cast rubber parts using plasticine as a mold. 
Regards Martin.

MartinW wrote:A mate of mine used to get tubes of silastic that had gone off  and carve out bushes and bump stops. I've also cast rubber parts using plasticine as a mold. 
Regards Martin.

That is a very interesting approach that I hadn't thought of. TAP plastics isn't that far away and I think they have most of the materials to make a mould. I only wonder how sturdy the resulting piece would be. Though undoubtedly cheaper than buying a single piece.

Apparently different types of silastic give different results. I'm not sure what type you would mold a stand bump stop out of. He got the silastic from the local council tip recycle shop, and I don't think they even charged him for them.
Regards Martin.

MikeyD wrote:Mine was hanging loosely so I removed it before I lost it. My problem is that I put it in a "safe place" until I got around to securing it back on the bike and now I can't find it!

 Mine is the "I will put this here so I know where it is" spot. Then promptly walk away and forget it. If I could remember where that spot is I would have so many pieces of hardware and small tools that I would  never need to go to the hardware store again!

It normally happens that you will find the part you put in the "special" place about a month after you bought a replacement.  And... you will find it while you are looking for a different part...

That you will not find, either.

Well now that some one else has redirected the thread, I'll bring up my latest Score, Fasteners. You know how the little buggers get lost so d*mn easily. Put one down and it seems to sprout legs and run off. Anyway, my bud, Greg - BMWMOA ambassador - called the other day asking if I might have a spare K-75/K-100 fan. Well I went and looked and glory be I found one tucked in an out of the way place where it had been residing for the past 10 or 15 years. So with fan and plan in hand I rode down to his small shop and inquired what it might be worth to him or whoever he was helping out. Allowing that they ranged in value from USD $20-$150 he suggested $75. I countered with $50 AND all the excess fasteners he had tossed into a tub AND a couple of the used electrical busses laying in a box I knew of. The busses were of value even though they were a mix of mostly R but some K electrics but they had all the connectors on them. So the hard bargaining done I rode home with two cardboard boxes behind me. The fasteners were about 30 lbs and the busses were another 15.  Here is a shot of the fasteners laying out drying after I got them home and soaked them in a mix of dawn and simple green over night:





Now to sort them. Oh, I should mention one part of this not shown is all the rubber bits that were included. I'm forever in need of various rubber tidbits. Sadly no side stand/center stand bumpers were found. Apparently he pitches them.