BMW K bikes (Bricks)


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1Back to top Go down   New Member in the UK Empty New Member in the UK Wed Oct 18, 2023 9:41 am

GraydoK100RS

GraydoK100RS
New member
New member
Hi All - Just purchased my first BMW (K100RS - 1986). I have come into motorbiking late (early-50s) and wish I had done years ago. 

The K100RS has been rebuilt and chopped by a PO and looks like a scramble rather than cafe racer. I have plans to smarten it up somewhat inc seat (bench seat over the current cafe racer single), new handlebar to bring it closer to me with my 50 year old back. New controls (maybe motogadget or motone!) new forks and some general painting/powder coating.

I have limited motorcycle knowledge but armed with the Clymer original maintenance manual and Haynes manual and this forum I feel pretty confident about tackling most things. 

FIRST PROBLEM - Can't get past around 2,000rpm and bike cuts out at will. Lacking power throughout. Jerky and revs at will with no throttle applied. I have replaced fuel pump and filter with spark plugs to be inspected and possible replaced. I will then move to the TPS which could be the culprit if faulty. 

Any thoughts/advice on the TPS symptoms??

Good to join the forum 
Thanks all.

    

2Back to top Go down   New Member in the UK Empty Re: New Member in the UK Wed Oct 18, 2023 9:53 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
WelKome to the forum, and best of luck with sorting the bike. We're glad to have you.
Member's Intro is just that. Best to post the trubs you're having in the appropriate section. This allows follow up and makes research easier later on for those with a similar issue. 
Cheers.


__________________________________________________
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
    

3Back to top Go down   New Member in the UK Empty Re: New Member in the UK Wed Oct 18, 2023 9:58 am

Dai

Dai
Life time member
Life time member
New Member in the UK 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
    

4Back to top Go down   New Member in the UK Empty Re: New Member in the UK Wed Oct 18, 2023 10:09 am

moriarti

moriarti
Life time member
Life time member
New Member in the UK 177912 sounds like air leaks/vacuum/leaks  in or around throttle bodies


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1984 k100 rs red/black VIN  0004449 Now sold to Olaf
    

5Back to top Go down   New Member in the UK Empty Re: New Member in the UK Wed Oct 18, 2023 1:20 pm

firstle

firstle
Life time member
Life time member
sounds like some one may have tried to "improve" on what BMW spent millions building , best of luck with your new project some one here will have the answers

    

6Back to top Go down   New Member in the UK Empty Re: New Member in the UK Tue Oct 24, 2023 7:47 pm

88

88
Life time member
Life time member
Welcome here. Put the model of your K in the profile. It makes it easier for us to help you as we pick up your questions in the technical sections.

There's a very good google search the forum facility on the portal page too, Have fun browsing though threads with similar issues.


__________________________________________________
New Member in the UK Ir-log1188....May contain nuts!New Member in the UK Ir-log11

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

K1 - 1989 - AKA Titan (unique K1/K1100RS hybrid by Andreas Esterhammer)
K1100RS - 1995. AKA Rudolf Von Schmurf (in a million bits)
K100RS - 1991 AKA Ronnie. Cafe racer project bike
K75RTP - 1994
K75C - 1991 AKA Jim Beam. In boxes. 
K1100LT 1992 - AKA Big Red (gone)
K100LT - 1988 - AKA the Bullion brick. Should never have sold it.
    

7Back to top Go down   New Member in the UK Empty Re: New Member in the UK Wed Oct 25, 2023 3:49 am

Suzi Q

Suzi Q
Life time member
Life time member
Welcome to the forum.
Has the bike ever run properly in its current form? In other words could the problem be incorrect assembly rather than component failure?
Pics of the throttles/intake system could be useful. As Moriarti says this sounds like an air leak(s)

PS If you think it's the TPS then the bike will run quite happily with it disconnected - an easy check.

PPS I'm going to stick my neck right out here and guess it's the AFM mounted on its side or something - I once tried that and found it's a complete no-no  Embarassed.


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Sometimes I'm not really Suzi Quatro.
    

8Back to top Go down   New Member in the UK Empty Re: New Member in the UK Wed Oct 25, 2023 1:32 pm

bad boy

bad boy
Life time member
Life time member
hello GraydoK100RS
New Member in the UK 177912


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Cheerz, David

New Member in the UK 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
    

9Back to top Go down   New Member in the UK Empty Re: New Member in the UK Thu Oct 26, 2023 5:53 am

Bernie_K100

Bernie_K100
Platinum member
Platinum member
Hi,

New Member in the UK 177912 to this forum!


Bernie

    

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