BMW K bikes (Bricks)


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Cdegrenier

Cdegrenier
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New member
My dad bought this '85 K100 RT sometime in the late 90s...he crashed it (wasn't hurt thankfully) then did a rebuild - mainly only changing the color from Blue to Black - the fuel tank repair may have been a bit janky.

In 2001 he decided this brick was not what he wanted and upgraded to a Triumph Sprint ST. He parked the BMW and then sadly passed away a few months later. I eventually inherited the bike, got it registered and rode it for a few years before garaging it after my first child was born. The bike has been parked for 18 years - only started it a couple of times since - probably last ran about 10 years ago. I didn't do proper storage since is thought I would pay more attention to it over the years.

My brother and I always dreamed about getting it back on the road - and maybe getting it to look less like a Goldwing and more like a scrambler or cafe bike. This past weekend we finally tried to get it started (it didn't) - and I realized how much I love the design of the engine and drive train of this bike.

My aim now is to get it back into running shape - and from there maybe upgrade/mod a few aspects to make it look cooler. Looking forward to learning from the community!

    

Laitch

Laitch
Life time member
Life time member
Put the last seven digits in the Serial Number search box at realoem and see if that clarifies the model type for you.

    

firstle

firstle
Life time member
Life time member
this is the place to ask any Qs there are a lot of clever people here

    

bad boy

bad boy
Life time member
Life time member
hello Cdegrenier
Hello from Massachusetts! 1985 K100 RT (or LT - not fully certain) 177912


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Cheerz, David

Hello from Massachusetts! 1985 K100 RT (or LT - not fully certain) 9438-010

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1997 Peraves Super Ecomobile: a Kevlar reinforced monocoque with outrigger wheels, seating two.
K100 fork, monolever, headlight, indicators, K1100RS gearbox and K1200RS 589 engine, rear wheel
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
WelKome to the forum. If an '85 model, it couldn't be an LT simply because they didn't begin production on that variant for the US until the end of the 1986 model year. But, as fellow New Englander Laitch suggested (above) earlier, it can be deduced a bit clearer with a VIN search at RealOEM or other parts catalogue.

Whereabouts in Massatucky? I have a younger brother who lives there, below Nashua, along the Cow Hampshire border.



Last edited by Two Wheels Better on Mon Nov 27, 2023 11:23 am; edited 1 time in total


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History is a vast early warning system ~Norman Cousins - Political Journo, Editor, Author & World Peace Advocate, 1915 - 1990 - Wikipedia
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & the 2nd '98 K1200RS
    

Dai

Dai
Life time member
Life time member
Hello from Massachusetts! 1985 K100 RT (or LT - not fully certain) 177912


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1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

7Back to top Go down   Hello from Massachusetts! 1985 K100 RT (or LT - not fully certain) Empty welcome Mon Nov 27, 2023 9:03 am

Paddy1

Paddy1
Silver member
Silver member
Hi from western NY.
search “cafe or return to stock” 
$$$
Be careful when ordering parts for the ‘85 year as lots of parts ar different up to mid’85 then change mid year to ‘86 and newer.
Ive used Max BMW site to help in getting the right parts


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Riding Beemers since 1988
1986 K100RT, 1985 K100RS, 
2001 K1200LT, 2004 R1100S, 
2004 R1150, 1980 R65, 
2014 Zero FX, 2021 Zero SR/F
    

fishboy316

fishboy316
Life time member
Life time member
Hello! I have peeps in Saugus. Good luck with the 85. I run an 85 K100rs was in similar condition except it started. Was a fun project, now a fun ride.

    

Cdegrenier

Cdegrenier
New member
New member
Laitch wrote:Put the last seven digits in the Serial Number search box at realoem and see if that clarifies the model type for you.

Thanks for this tool - according to the frame number this is a k100 RS made in July 1984...so my hand-me-down info appears to be wrong.

Thank you all for your warm welcome!

I'm already learning that parts are $$$ and I need to be very methodical. At this stage just to get it running i need to renew the fuel delivery system due to my negligence in storage.

Looking forward to learning from you all.

    

Paddy1

Paddy1
Silver member
Silver member
try i think euro moto electric?


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Riding Beemers since 1988
1986 K100RT, 1985 K100RS, 
2001 K1200LT, 2004 R1100S, 
2004 R1150, 1980 R65, 
2014 Zero FX, 2021 Zero SR/F
    

Paddy1

Paddy1
Silver member
Silver member
injectors can be electronically cleaned as oppose to buying new.
good luck.


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Riding Beemers since 1988
1986 K100RT, 1985 K100RS, 
2001 K1200LT, 2004 R1100S, 
2004 R1150, 1980 R65, 
2014 Zero FX, 2021 Zero SR/F
    

Paddy1

Paddy1
Silver member
Silver member
also date code on frame below the seat will help. 
Bikes built in 84 were some of the earliest k bikes sold here in the US.


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Riding Beemers since 1988
1986 K100RT, 1985 K100RS, 
2001 K1200LT, 2004 R1100S, 
2004 R1150, 1980 R65, 
2014 Zero FX, 2021 Zero SR/F
    

13Back to top Go down   Hello from Massachusetts! 1985 K100 RT (or LT - not fully certain) Empty another Tue Nov 28, 2023 8:23 am

Paddy1

Paddy1
Silver member
Silver member
kforum-tech.com 
mechanical section
👍


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Riding Beemers since 1988
1986 K100RT, 1985 K100RS, 
2001 K1200LT, 2004 R1100S, 
2004 R1150, 1980 R65, 
2014 Zero FX, 2021 Zero SR/F
    

Bernie_K100

Bernie_K100
Platinum member
Platinum member
Hi,

Hello from Massachusetts! 1985 K100 RT (or LT - not fully certain) 177912 to our community!


Bernie

    

dbier

dbier
active member
active member
Welcome!  Don't forget BeemerBoneyard.com and for any needed body panels and many other items that I can't find stateside - I've used Thom at https://kpartsholland.com. Shipping is not nearly as expensive as I thought it would be and he has many used parts (and now new) that have helped me and my son keep our 4 K bikes on the road!

    

92KK 84WW Olaf

avatar
Life time member
Life time member
Greetings too!

I have an 83 K100RS and 2 1984 Ks, [K100RT and K100 Sprint] so yes be very careful about parts if you are 85. Your simple clue is really the gas tank, is it bolted down?. If yes, its early 85 K, if not it's the later 85 one.

The engine number, on the casing below the oil filler cap, is a very good guide because it's got the week and year coded, so my RT is 3284 as in week 32 of 1984. The last part of the engine number is a pair of 4 digit numbers. The very last one is the engine number, the 4 digit set before it is your week and year.

Now my 83 K has numerous differences from my 84 Ks but as far as I know none of those very early ones found their way to US. A push button gas tank cap is a quick clue.

An earlier post recommended Thom Hellbrekkers at www.kpartsholland.com and he is indeed a great parts source. So too is www.tills.de for new service parts. Shipping from Europe is a fraction of the cost of shipping from US to Europe.

Fuel tank stuff is really generic, the outside tank fuel lines are similar to Honda bikes, the fuel pump is used in many cars in Europe of the same era and some of those were sold in US. Peugeot, VW, Audi, Lancia, Citroen all used them. Over here BMW are happy to charge close to €250 for a fuel pump [with a BMW stam on] that I can buy off tills.de for €40 without the BMW stamp! Honda bike dealers can sell you exhaust studs and nuts too!!

My 83 RS spent 17 years languishing in a heated boat shed.....I have it 5 years now [3rd owner] and did many many jobs to it, no unexpected ones but all anticipated thanks to the forum hear and the 3 other Ks I had at that stage.


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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 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 49,200 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 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
    

Arlina

Arlina
Moderator
Moderator
Welcome Cdegrenier Smile


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Hello from Massachusetts! 1985 K100 RT (or LT - not fully certain) Eu-log10  K1100RS/LT - R1200RT - R1100RS - Cagiva SST 350 Ala Verde - K75LT project - K75 Schurgers - K75S - K1100RS - K75RT - K75C
    

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