BMW K bikes (Bricks)

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1Back to top Go down   New here  - first question. Empty New here - first question. Wed Jun 03, 2020 12:23 pm

bobbyG

bobbyG
New member
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Hi Ya'll

I am pondering a 85K100lt

I was wondering what the watt output is on this thing.  I'd like to do some heated gear.

Also any issues I should be aware besides:

speedo not working

hot in the summer

chk to see if the final drive has been lubed.


The thing needs tires I reckon.  What is a set gonna cost me roughly?

Thanks!!

We shall see.

    

2Back to top Go down   New here  - first question. Empty Re: New here - first question. Wed Jun 03, 2020 1:17 pm

92KK 84WW Olaf

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Great to see you on board!!!

1985 it is going to be a K100RT as the LT came later. Essentially the same, mechanically, fairing, are identical apart from usual updates.

If you go into the portal page here there is a link to what to do if you have just bought a K bike. Have a read of that.

Under the clutch bell housing, near the back of the engine there is a 1/4 inch diameter hole. Make sure no oil is coming from it.

At the front of the engine is the coolant/oil pump. Make sure no leak coming from it.

If the centre stand has the curved feet be advised they break unexpectedly and land your bike over, can be expensive. I changed on 2 Ks to K1100 complete assemblies as they don't break. Complete assembly is a straight change.  

I can't comment on price of tyres there, but your conditions in cold and rain are similar to our and I use Bridgestone Battlax BT45 but others use different and are happy.

Alternator can be upgraded to K1100 ones and they have higher output.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 40,490 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

3Back to top Go down   New here  - first question. Empty Re: New here - first question. Wed Jun 03, 2020 3:12 pm

Point-Seven-five

Point-Seven-five
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Welcome! 

If you use LED driving lights, the 32amp alternator will have about 100 watts available for heated gear. 

The RT airing is very efficient at keeping engine heat in.  There are lots of things folks have done over the years to cool things down a little.

That first peek at the splines of a new bike is pretty scary.  My experience is that if the bike has been well maintained cosmetically the chances are good the splines have been cared for as well.

The RT is not what I would consider a canyon carver, it's real job is to put massive amounts of asphalt behind you in comfort.  To that end I go for tires that handle well but have a fairly low cost per thousand miles.  My K75RT runs on Shinko 230 Tourmasters.  If you can mount and balance them yourself you can get a set(front and rear) that should give you over 9,000 miles, online for under $180.  If you shop around you might be able to get a set mounted on your wheels(you remove the wheels from the bike) for around $250-275, maybe less. 

Depending on the problem, the speedo might be repairable.  It could be simple or complex/expensive depending on the problem.  Early K100's are known to have had speedometer issues.  What is the specific problem here?

As far as common issues, I have had miserable luck with rear brake master cylinders.  So far I have had to replace four of them.  I've also had overheating issues caused by mineral buildup in the cooling passages and massive amounts of bugs and dirt in the cooling fins.  You also would be smart to figure on replacing the rubber hoses for the fuel lines and breather as well as planning on cleaning the interior of the fuel tank if the bike has been idle for an extended time with ethanol fuel in the tank.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down   New here  - first question. Empty Re: New here - first question. Thu Jun 04, 2020 12:58 am

bobbyG

bobbyG
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New member
thanks for the replies.

Yes it is an rt.  I had been looking at some 1100Lts a few months back.  I musta had it on the brain.

I've emailed but no response yet.  I like to do email first so I can get my Q's answered / see what response/seller I'm dealing with.  Most good ones respond via email even though they might not want to.  If I have to drive a fair bit, I kinda like to know who I am dealing with.   That's me. I'm not in a hurry to find something ....an  affordable bike with a fairing/windshield, upright seating, easy to work on, fairly reliable, not expensive - good elec. output, bags, not a Goldwing.  BMW's have attracted me for some reason even though I've gotten a lot of advice to stay away.  I've had a few older GW's I liked but I want something a bit lighter/smaller.  I have a 78 GL1000 now but its set up as a naked bike.  I don't ride it much because of that.  I like having it in the garage though. Very Happy

That said,  here is the ad.  If it isn't cool to post them my bad - I will edit it out..
https://portland.craigslist.org/clk/mcy/d/la-center-vintage-bmw-1985-k100r/7134827016.html
I'm guessing it would need tires.  Looks like the rear m/c was replaced. hmmm.....   no mention of the speedo.  former owner was a fighter pilot - they usually are a little meticulous / detailed about things. 

everyone's idea of condition - good, fair, and excellent seems to be a matter of perception/opinion/i need to inflate it a little to get someone to show up.  I've been disappointed mostly and have missed out on deals cause I didn't believe it was that good.  He says "good"  Kinda hard to tell with the pics posted.  It isn't 'excellent' - its 35yrs old so there is that.. 
If it was close I would go look at it, but its a 2-3hr drive.

    

5Back to top Go down   New here  - first question. Empty Re: New here - first question. Thu Jun 04, 2020 1:06 am

RicK G

RicK G
admin
admin
Looks OK and with the work he has done I would say it's worth the drive.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

6Back to top Go down   New here  - first question. Empty Re: New here - first question. Thu Jun 04, 2020 4:43 am

volador

volador
Life time member
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It is a tough call. Looks well kept but I would stay away from the 1985 one hit wonder.
The fuel level sender is of the old type thermistor design, is all rubber on the outside and is NLA 'no longer available'.
When that fuel level sender starts leaking or is partially disintegrating on the outside your SOL

I would confirm the year actually is a 1985 by the last 7 #'s of the VIN in the BMW Max Fiche


__________________________________________________
1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

7Back to top Go down   New here  - first question. Empty Re: New here - first question. Thu Jun 04, 2020 10:08 am

Point-Seven-five

Point-Seven-five
Life time member
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Looks to be in good condition cosmetically, but I wonder how many miles it has.  The price is higher than what I would pay for an '85 RT.  The stuff that was done is not high dollar service other than for the rear master cylinder. 

I would ask if the speedo works and how many miles the bike has.  For $2750 I would want to see a working speedo and real documented mileage under 50,000.  Early speedos had problems and were replaced under warranty.  When that was done, the dealer put a sticker under the seat saying what the mileage was on the old speedometer.

Being an estate item, the seller(s) are being typically over optimistic on the price.  If it's a fresh listing, they are not going to be very negotiable on price. IMO a 2-3 hour drive is too far to go to haggle over the price of a bike with unknown and unverified mileage.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

8Back to top Go down   New here  - first question. Empty Re: New here - first question. Thu Jun 04, 2020 12:10 pm

bobbyG

bobbyG
New member
New member
Thanks for that volador.  I'm learning.  I will keep that in mind.  85 was special eh? 
My old wing has a lot of those NLA parts but I've managed to round up replacements.  no main bearings to be had but I picked up a spare motor for $25.

Point-Seven-Five,

All good points.  I've have noticed estate sellers to be as such myself.  There is this local 1100 rt with under 7k miles that started out at $8500 years ago - its down to $5500 and still for sale. 

I did not hear back from the seller.  I left my ph# too in case he really wanted to call me.  I mighta asked too many questions.  That right there weeds out a bunch.  Not going to pursue it further.

I didn't know there was a k100rt before this.  
I will have to do a little more research.

I'm still open to an old BMW for their character and community.  I don't know if they have more issues than other old bikes but when they do does seem like it can get spendy quicker.  Probably just my uneducated observation at this point.

thanks again

    

9Back to top Go down   New here  - first question. Empty Re: New here - first question. Thu Jun 04, 2020 12:51 pm

92KK 84WW Olaf

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Life time member
Life time member
Some people get really hung up on low miles K bikes.

They can be nice cosmetically but lack of use leaves rubbers, seals, hoses perished and a lot of other things needing service, plus out of date tyres.

A well used K and 40-70,000 miles and really good maintenance is the ideal.

I picked up a nice 83 K100RS 29,000 miles and it hooked me completely. Old registration, in very good condition having been in a heated boat shed for 17 years. The seller was reasonable and his asking price made sense. But.....it needed the obvious K bike items and I knew the things to expect and had a budget. Turned out the budget was exceeded by a very small amount. But I would have been distressed if this had hit me out of the blue. I am looking at another very nice K bike that still has original tyres and I have no doubt its looking at bad rubbers, seals and a lot more as it hasn't moved in many many years.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 40,490 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

10Back to top Go down   New here  - first question. Empty Re: New here - first question. Thu Jun 04, 2020 1:06 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Your mileage may vary, but I have found that old K bikes are arguably the best buy in motos you can find.  The engines are easily capable of 200,000 miles, they are comfortable and can cover a thousand miles in a day, more if the rider can handle it.

They are can be maintained by any reasonably mechanical owner for not very much money.  The problems most of them have are from sitting neglected for many years, and once they are brought up to proper operating condition they are as reliable as any modern bike.  Lots of parts are available on the internet so you don't always have to go to the dealer.

I have three of them in the garage right now.  My K75RT has been out to the western U.S. four times and circled the Great Lakes.  If the border opens up, I hope to ride it to Fairbanks, Alaska this summer.  It has 94,000 miles on it.

Keep looking, you will find a good one.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

11Back to top Go down   New here  - first question. Empty Re: New here - first question. Thu Jun 04, 2020 6:06 pm

92KK 84WW Olaf

avatar
Life time member
Life time member
A well maintained K on 100,000 miles or more and a good number of years in the one ownership is going to be a better buy than a 5,000 mile one that's sat for 25 years. Ok the 5,000 mile one may look better, but is got a heap of jobs coming before its as reliable as a 5,000 mile one a year old.

Build up a good parts store.....its a great money saver.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 40,490 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

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