Author Topic: Another K100 followed me home (Read 36347 times)

bomber737 · « **on:** December 11, 2013, 09:20:39 AM »

Hi to all on this forum. I just won an auction for a 85 K100. I already have a K100 but it is in parts and it's got 150,000 miles on the engine. The new bike has only 14,000 miles but it came with a salvage title. So my thought was to pull the salvage frame and put my titled frame on this engine. The new bike has been layed down on the right side and the fairing and fairing lowers are a little messed up. So last night I was was comparing the fairing from my first K100 with the new one and there are some big differences. I was wondering if anyone on here can tell me why they are so different. Does the new to me bike have an aftermarket fairing? The windshield is also very different between the two. Here are some pictures of the new to me bike as she sits last night when I got her home. In the rebiuld the gators will be going away, the bike will definately be getting new tires and I will be using the blue body work I have from my other K100.

K75RT Keith · « **Reply #1 on:** December 11, 2013, 09:32:17 AM »

Post photos. Without them it's kind of hard to answer your questions.

As there are 3 basic models of K's naked, RT and RS. The fairing of the RT is different from the RS. The other possible answer is that you have an aftermarket fairing.

Brad-Man · « **Reply #2 on:** December 11, 2013, 12:36:51 PM »

The new bike is an '85 K100RT.

You haven't posted pics of the old fairings, so it can be a naked, a K100 w/a "C" fairing or and RT or even an aftermarket fairing on any of those.

bomber737 · « **Reply #3 on:** December 11, 2013, 07:56:19 PM »

Are the photos not coming up? I did download pictures of the new to me bike as it sits in my shop. Here are a few pictures of the windshield. I noticed that I cut it out in the last bunch of pictures and a photo of the fairing that is from my RS donor bike. I have a windshield for the blue fairing that I know fits.

Grim · « **Reply #4 on:** December 11, 2013, 09:54:40 PM »

The bottom fairing is a RS. The windscreen on the RT is aftermarket.

bomber737 · « **Reply #5 on:** December 12, 2013, 10:50:56 AM »

I see, thanks for the information. Its coming off anyway unless I can find another fairing that's reasonably priced. Deconstruction has begun, yesterday I ordered a new key. Of course it has to come from Germany. When that get here I will push it outside and see if it fires up and how it runs before I pull it all apart to swap the frame.

Grim · « **Reply #6 on:** December 12, 2013, 05:18:06 PM »

Finding fairings in any kind of shape is getting hard and expensive.

My bike has also been dropped and the repair was less then stellar and a crack is forming in the repair. I love the look of Nakeds and Cafe and that is really the cheap way to go but the fair is so effective on the hwy I think Id miss it. It really puts a big dent in wind noise.

orforester · « **Reply #7 on:** December 12, 2013, 08:17:43 PM »

I guess I am confused, do you need new RS fairing or RT? I have a top RS fairing with windscreen, be glad to trade for your RT windshield.

bomber737 · « **Reply #8 on:** December 13, 2013, 02:06:33 AM »

I am looking for a nicer RS fairing, the one I have has some road rash on one side. Its not bad and I can fix it I just don't want to spend the cash right now. Parts for this thing are uber expensive if they are in descent shape. I am building my wife a Suzi with a 850 frame and a 1000 engine from parts I had laying around the garage. That project is taking most of my extra cash at the moment. I will not be using the RT fairing and or windshield so email me at bruced737@yahoo.com and we can work out a trade. I had been able to remove the broken RT fairing and lowers and assembling the RS fairing. I could use a set of lowers, I really only need one but to keep everything the same would get a set. The other K100 I have will be definitely be becoming a cafe, not enough parts left to put it back to original.

bomber737 · « **Reply #9 on:** December 13, 2013, 11:10:41 AM »

I just picked up a fork brace and I was planning on rebuilding the forks. I am looking for a cheaper source for the dust covers or is that just what they cost ($21 each)? What do most people upgrade the springs to? I am running a set of sonic straight rate springs with gold cartridge emulators and a Trazzoin for brace on it. I will be having a custom rear shock made for this bike. I have a set of those on my GS and they are the best. Damp in both directions and the guy can put any spring rate you want in them. Think he charges around $200 to $250 to build you a set. My GS shocks cost me $450 for the set. They are rebuildable and the guy is great to deal with if anyone on here is interested in getting a new shock. His site is Deycore.com

bomber737 · « **Reply #10 on:** December 16, 2013, 08:17:09 PM »

Had time last night to work on the bike a little. I was going to charge the battery and I found a bunch of corrosion of the neg lead. While I was wrenching the bolt and nut out the darn lead broke off the battery. So last night I got a new one ordered. It's to bad the neg didn't look like the pos lead, it was in perfect shape. Man I have a bunch of batteries to bring in for recycling. One thing I forgot to ask, I am planning on pulling the trans off the bike so I can get the splines lubed and I was watching a video of the procedure on youtube. In the video they pull the exhaust as one piece with the mount and that looks like what I will do. My question is do you need to replace the exhaust manifold gaskets or can they be reused?

Opus · « **Reply #11 on:** December 16, 2013, 11:27:53 PM »

Replace the gaskets. Better safe than sorry, and they do not cost that much even from BMW.
Battery post paint will help with the battery post corrosion problems.

orforester · « **Reply #12 on:** December 17, 2013, 01:53:54 PM »

In theory, you should be able to pull the muffler off and leave the header pipes, even on my rusted 85 I was able to do it. Remove the rear wheel and then WD the junctions and then it pulls (wiggles) right off, leaving the header pipes in place.

motodude · « **Reply #13 on:** December 17, 2013, 08:23:42 PM »

If your RT windshield is in good shape. And, you're interested in selling it, I may be interested in purchasing it.

Tom

bomber737 · « **Reply #14 on:** December 26, 2013, 06:29:38 PM »

Sorry, another guy already made a deal with me to trade me the stuff I need for my RS fairing for that windshield. I was able to get some work done on the bike. I have ordered new fork seals, dust covers, throttle cable and clutch cable. I already got my new battery and installed it, pushed the bike outside as I am not allowed to fire up stuff in the house. Not even if I open the window in the shop. Some people are just not much fun. Since I got the bike from a place that sells insurance totaled vehicles I didn't know if it ran or not. I put the key in and it fired right up and purred. What a great feeling listening to that engine run like it should and not make any weird noises. The valves even sound like they are in adjustment. I pulled it back inside and started tearing it down. Since I have a few months I will be pulling the trans and lubing all the splines. I got the rear diff pulled and found the splines to be in good shape and there was plenty of lube still in there. I understand it tends to creep up the shaft when you put a lot of miles on. The swing arm came off quite easily but the clutch boot(cup) had ruptured and has been seeping oil out so the back of the trans is a total mess. I will be soda blasting that clean and under the battery box is corroded as well. if the aluminum didnt have such a rough finish I would just polish it all up. The output shaft splines are in good shape as well. Next I pulled the exhaust off and all but the last 2 studs came out with the nut so those will all get replaced but I will be leaving the last 2. I pulled the frame because I have a clear title on the frame from the other K100 I have so that will be going on when I get new head bearings installed and the forks rebuilt. So the last picture is how it sits right now.

bomber737 · « **Reply #15 on:** December 31, 2013, 06:10:58 PM »

Finally had time to work on the k100 today. I got the side stand mount removed and I got the trans pulled. Was not a bad job at all, just messy with the oil leaking from the clutch actuator. I did find that there is a little oil underneath the clutch. I am not sure if any can be in there or if I need to replace some perished seals. Maby some one on the forum can tell me what I need to buy and replace? At least I will have piece of mind that I know things are not leaking and lubed well before I start riding the bike this spring.

orforester · « **Reply #16 on:** December 31, 2013, 10:56:53 PM »

Check out Max BMW fiche site, it helps put things together. Your rear seal is probably shot/leaking, you are this far, replace it. 11-11-7-666-186, but there is one on FleaBay now :

http://www.ebay.com/itm/New-BMW-Crankshaft-Rear-Main-Seal-11117666186-K75-K100-K1-K1100-K1200-/161186075990?pt=Motorcycles_Parts_Accessories&hash=item2587705556&vxp=mtr

And read up on the replacement on ibmwr.org, helpful and I think there are pictures here, but start with:

http://www.ibmwr.org/ktech/mainseal.shtml

I think the two most important things are keeping the clutch lined up, mark all the parts as they come off, keep them together in the same way and second leave a small part of seal exposed, I think the recommendation is .05mm.

You might want to look into the tools Ken lively offers: polepenhollow@yahoo.com, they are pretty cheap and do the trick for re-installing the clutch and getting it lined up. Or you can use a screwdriver with duct tape on it, but the tool is way easier. IMO

bomber737 · « **Reply #17 on:** January 01, 2014, 10:54:05 AM »

Thanks for the link to the seal, that saved me 15 bucks. I will get the other stuff ordered today from Max so I can get this job done. I think I will just order the alignment tool from that guy you sent me his email. Quicker and easier to do it right the first time with the correct tool. My only problem now is which fiber washer to use. They list 2 different sizes and I am not sure which one is correct and they are 7 bucks different in price. Any thoughts anyone?

orforester · « **Reply #18 on:** January 01, 2014, 12:30:11 PM »

You mean the washer for clutch 873 or 813? I re-used the existing one, not need to order a new one of those, order the star washers (377) and the bolts (417) along with the nut(797), o ring(467) and compression ring(696). Be sure and check your clutch plate thickness while you are there.

And yeah compared to other bike BMW parts are expensive, but you can get them!

Happy New Year!!

bomber737 · « **Reply #19 on:** January 02, 2014, 11:24:35 AM »

Yes I do mean 873 or 813 for the fiber washer. I guess I would like to replace all the washers and other parts I can. I had planned on checking the clutch disk. The bike only has 14,000 miles on it and it appears that the bike has been cared for when it was being used. I did order part 813 since it was cheaper so we will see what the bike has inside it. All the other parts have been ordered so now it's just a waiting game. in the mean time I am keeping busy wire brushing all the oxidation off the trans, swing arm and rear diff. Starting to look like a BMW should. A new set of tires are going on the rims right now. Yeah I love new tires.

bomber737 · « **Reply #20 on:** January 02, 2014, 04:14:43 PM »

I got bored today and started looking at the sad state of the finish on the trans, rear diff, and swing arm and busted out the wire brush. Hours later and a pile of dust and the parts look quite nice I think. I like the sand cast look so I think I will just leave them as they are and protect them with some Autosol. I do have a question, can anyone tell me what the 2 alignment pins are for on the back side of the trans? I kept the rubber cushions for them I just can't remember what was there.

bomber737 · « **Reply #21 on:** January 07, 2014, 05:57:01 PM »

Found time again to get some work done on the K. I got the clutch pulled and started working on getting the last clutch part out. I got everything marked so I can re-install it the same way it was. I only found 1 factory mark so I am making sure I know how each part goes back exactly. I have not measured the friction disc yet but it looks to have plenty life left in it. I need to get my puller on the last clutch part to get it off. That o-ring is being stubborn. When I pulled it forward it started leaking oil out. Is this normal? I already have a new rear main seal to go in.

Froader4life · « **Reply #22 on:** January 09, 2014, 02:28:34 AM »

The two pins on the tranny are to locate the rear plastic fender.

Looks like you're having fun. You wanna polish all my bare aluminum for me? I'm not looking forward to it.

bomber737 · « **Reply #23 on:** January 09, 2014, 10:25:04 AM »

Ha, ya no. I decided to paint my trany, swing arm and diff. They look great I am very happy with how they turned out and hopefully I wont have to worry about corrosion anymore. I finally got around to pulling the old tires off the rims and to my surprise they came off easier than 90% of the tires I have changed lately. These rims are dirty, doesn't anyone clean their bike anymore? These are a dirty oil mess so I guess I have to go get some kerosene and another toothbrush and get started. My new front tire will be showing up today and I would like to get it mounted. I am planning on removing the front rotors so I can wire brush them replace the deformed nuts with a nice set of nylock nuts. I was thinking of replacing the front wheel bearings so I started reading the manual. Do you really need to heat the hub? I have a bearing removal tool and have never had a problem pulling them out before. Do I run the risk of fracturing the hub if I just pound them out?

bomber737 · « **Reply #24 on:** January 10, 2014, 12:26:59 AM »

More work done today, I got the rims cleaned up, rear tire mounted and the final coat of paint on the rear end stuff. Now I am just waiting for the rest of the parts from MAX and my new front tire. Hope it all gets here soon. I want to have the bike back together by February. As soon as the snow is gone I will be out riding. Now I just need to balance it so off to harbor freight tomorrow to look at balancing stands. I don't think the one I already have will work on this rim.

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Author Topic: Another K100 followed me home (Read 36347 times)