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1984 BMW K100RT? Thinking about it...

Discussion in 'Other Motorcycles' started by Timbox, Feb 12, 2018.

  1. Timbox

    Timbox Active Member

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    Yes it popped up kinda in my area and it is FI, so I think I am biting. It will be stripped down a bit as I have my 07 Bandit 1250 for nice long rides, so the K100 would be for town trips and such. Can you tell I am trying to talk myself into it.

    Bad note is that I might have to get another bonded title! I see so many "lost title", "looking for title", or other title issues drives a person to wrench ;)

    Anyone here ever had a K100RT? If so any words for wisdom for me?

    Tim
     
  2. Polock

    Polock Well-Known Member

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    something like this
    [​IMG]
     
  3. Timbox

    Timbox Active Member

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    Yes something much like that but not in such good shape or shiny ;) I have been doing a little reading and see the rear spindle is a weak point that should be addressed before buying one? I guess rebuilding the spindle is around $1K if it is in bad shape. I would hate to put that much into just one area of the bike. I know my 1200 Madura had issues with the spindle too, but that spindle is a beast and had no issues. I have worked on so many carb bikes I just feel it is time for a old FI bike.

    So how to you like your K100RT? Looks like it might have a little leak, is that a common thing? I would have it stripped down as the PO does not have the parts. Here is the add and some pics, trying to get a hold of seller but no reply so far.
    https://duluth.craigslist.org/mcy/d/bmw-k100rt-project-bike/6477397214.html
     
  4. Polock

    Polock Well-Known Member

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    yes driveshafts are a weak point caused by lack of maintenance, keep them greased and they last forever. it's not hard to do but you know how maintenance goes.
    1000$ sounds like new parts.
    the leak isn't really a leak, the piston rings are free to spin in their grooves, sometimes they align on the lower part of the horizontal cyl and oil will seep through the end gap.
    and find it's way to the exhaust valve and drip from the header/head joint. that pad you see is probably two years old.
    the FI system is called a open loop, no O sensor. the throttle hiccup is most likely the grip itself, it's a 90 deg. gear thing that seems odd. the clutch is dry like a car and the cable lifts the side stand when pulled, has to be adjusted just right.
    under the engine you'll see a bell housing, a weep hole is cast in it, if oil is present the rear main seal is going. lots of bolts, easy job.
    wheels are soft, don't hit a big square edge pothole. xj's use a lot of 6mm bolts that uses 8 and 10mm, it's built like a tank. rides like a cloud, the engine seems like a electric motor, no bogs no peaks just smooth power. the shifter is like a precision instrument. top end is determined by how tight you can hold on.
    fuel pump is inside the tank, not fun.
    speedo is intermittent on most of them, no real fix. i use a bicycle speedo
     
  5. Timbox

    Timbox Active Member

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    Polock,
    Thanks for all the info. I have to say I thought sense it was already missing many parts to keep it naked. I see the 78K miles is really no big deal, but the other issues are. It is 3.5 hrs one way from me and the seller still has not contacted me. I would guess it will not come home to my cycle shed, but I can still dream.

    I was also reading the older K100's had 16v heads in them, that would be nice.

    This just in...look at this add and give me some feedback pls.
    https://minneapolis.craigslist.org/ank/mcy/d/1987-bmw-k100/6495378281.html
     
    Last edited: Feb 13, 2018 at 6:36 PM
  6. Chitwood

    Chitwood Active Member

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    Might be worth a shot in my opinion
     
  7. Polock

    Polock Well-Known Member

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    go for that one, i think it's a RS. the windshield is off or something, that's a common mod. they say it gets real hot in the summer, i just use a deflector held on with Velcro.
    muffler isn't stock, the pipes are SS, those are the RS bars, lower than RT. i think they swap with the same cables. if it sat that long with gas in it the fuel pump might need looking at. there's a mod to put a 80's mustang pump in it, cheap fix.
     
  8. Timbox

    Timbox Active Member

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    Made the call tonight, on the road in the morning. If all works out and I hope it does, will have a new bike in the stable. Looks like I will get the 87 K100RS with everything for a good price, just hope it is as good as current owner says. Never got to see the right side of the bike as it was not in the add. Update with pics I hope in a day or so.
     
    Plug and Chitwood like this.
  9. Timbox

    Timbox Active Member

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    Well it did not happen, always get pics of all sides of the bike before you leave your driveway. Once of those too good to be true, but had to try. There will be others.
     
  10. Timbox

    Timbox Active Member

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    Seller came through with the pics and then met me at a great price. 165 miles one way with high wind but I have her in the shed. Battery being charged and then I will go through it if it gets warmer. I was able to get another batter in her and plug the ECU/CDI in. All things seem to work and I even touched the starter, she turned over....
    [​IMG]20180218_155220[1] by Tim Brown, on Flickr
    [​IMG]20180218_155240[1] by Tim Brown, on Flickr
     
    Last edited: Feb 18, 2018 at 6:34 PM
  11. Polock

    Polock Well-Known Member

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    very nice
    i hope you have the mirrors, their like gold
     
  12. Xjrider92117

    Xjrider92117 Active Member Premium Member

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    That looks like a very nice and fast bike!
     

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