BMW K bikes (Bricks)

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1Back to top Go down   Now A K100LT  Empty Now A K100LT Sun Jan 24, 2021 9:45 am

rc2870

rc2870
active member
active member
Hello everyone. I've just got a 1989 K100lt with 55700 miles as a project. Its stock and Its in need of tlc but has just been lying in a garage so not overly abused. Im sure I'm going to need some help and guidance as I'm new to BMW. Looking forward to firstly getting it running. Thanks in advance. Rc

    

2Back to top Go down   Now A K100LT  Empty Re: Now A K100LT Sun Jan 24, 2021 9:53 am

cycleman

cycleman
Silver member
Silver member
Welcome and lots of good info here.

    

3Back to top Go down   Now A K100LT  Empty Welcome Sun Jan 24, 2021 9:56 am

Paddy1

Paddy1
Silver member
Silver member
Welcome Rc2870,
Good luck with your project.
You will find lots of great advice and support here.


__________________________________________________
Riding Beemers since 1988
1986 K100RT, 1985 K100RS, 2001 K1200LT, 2004 R1100S, 2004 R1150, 1980 R65, 2014 Zero FX
    

4Back to top Go down   Now A K100LT  Empty Re: Now A K100LT Sun Jan 24, 2021 12:20 pm

Arlina

Arlina
Moderator
Moderator
Welcome RC Smile


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Now A K100LT  Eu-log10  K1100RS/LT - R1200RT - R1100RS (RIP) - Cagiva SST 350 Ala Verde - K75LT project - K75 Schurgers - K75S
    

5Back to top Go down   Now A K100LT  Empty Re: Now A K100LT Sun Jan 24, 2021 12:59 pm

Dai

Dai
Life time member
Life time member
Now A K100LT  177912


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1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

6Back to top Go down   Now A K100LT  Empty Re: Now A K100LT Sun Jan 24, 2021 6:57 pm

Porto

Porto
active member
active member
Welcom, great site. I’ve had my 85 k100rt since 2010. Great machine mate. Good luck. My tip is clean the fuel tank out and then put a little metho in with the fuel on a regular basis. There’s a water trap that causes the aluminium to corrode, I’m patching mine for the second time at the moment. The metho will mix with the water then that with the fuel. No problem for the engine. I wish someone had let me know when I got mine , cheers.

    

7Back to top Go down   Now A K100LT  Empty Re: Now A K100LT Sun Jan 24, 2021 8:22 pm

MartinW

MartinW
Life time member
Life time member
According to a industrial chemist where I volunteer the corrosion is caused by using ethanol laced fuel. The ethanol when combined with water allows a bacteria to form. This bacteria lives in the mix and secretes acid.
Regards Martin.


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K75s Hybrid
    

8Back to top Go down   Now A K100LT  Empty Intetesting Sun Jan 24, 2021 9:23 pm

Porto

Porto
active member
active member
Hi, interesting. I got my info from BMW , I’ve had a contact, sadly Theo has had a stroke and isn’t able to talk bikes anymore. He used the metho in his and the other bike mechanics the same. Also another friend Kev, also a mechanic did the same with his sons BMW that also now own as a second bike. It seems to be the way go. Thanks for posting that theory, is interesting. I’m going to have a look that, I’ve got spare tanks here and I’m looking to stop further trouble. Thanks mate

    

9Back to top Go down   Now A K100LT  Empty Re: Now A K100LT Sun Jan 24, 2021 11:09 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
If you are using fuel moxed with ethanol, you are already adding alcohol to the fuel which will absorb any water in the tank and then mix it with the fuel to be burned. The corrosion is the result of the fuel/ethanol/water mix sitting in the tank for extended periods. It's one of the downsides of not using the bike regularly and putting enough miles on it to burn a tank of fuel once a week.

If the bike isn't going to be used for an extended period, it's important to get the ethanol blended fuel out of the tank. Either drain the tank completely, or begin using non-blended fuel a few weeks before taking the bike off the road. A tank that is full of non-ethanol fuel will easily make it through 6 months of storage with no ill effects.


__________________________________________________
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
    

10Back to top Go down   Now A K100LT  Empty Re: Now A K100LT Mon Jan 25, 2021 12:28 am

MartinW

MartinW
Life time member
Life time member
https://roadguardians.org/september-2012-newsletter-biker-chads-corner/
Extract from the above link referencing the formation of bacteria.

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[*]Water in fuel.  Pure gasoline does not absorb water but ethanol will.  Ethanol is hydrophilic this means that it pulls moisture from the air and bonds with it.  In ideal conditions E10 gasohol will keep roughly .5% water by volume is suspended in gasoline.  Our fuel tanks and fuel storage cans are hardly ideal conditions as they need to be vented allowing the ethanol to absorb more moisture from the atmosphere or in the form of condensation.  Ethanol never truly bonds with gasoline molecules it is a loose mixture at best so when the threshold of .5% water is exceeded or the E10 gasohol mixture cools off every night the water / ethanol solution falls out of suspension in the gasoline.  Oil and gasoline float on water as they are lighter than water so the water /ethanol mixture will stay at the bottom of your fuel tank.  The process of the water and ethanol separating from the gasoline and sinking to the bottom is called “Phase Separation”.  Phase Separation is a real problem because the water from the bottom of the tank is sucked up and sent to the engine it causes a lean condition raising the engine temperature causing valve damage, carburetor, fuel lines and electronic fuel injection pumps pull fuel from the bottom of the tanks where the ethanol / water mix stays and water doesn’t burn well in the engine leading to premature engine / fuel system corrosion and poor engine performance.  It gets worse, ethanol and water mix in E10 gasoline is a breeding ground for microbes like bacteria and fungi which just adds to the corrosion and debris in your fuel system.

[/list]


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K75s Hybrid
    

11Back to top Go down   Now A K100LT  Empty Re: Now A K100LT Mon Jan 25, 2021 5:03 am

Matthew-Brisbane

Matthew-Brisbane
Life time member
Life time member
Iif you twish the throttle you wont have problems with stale fuel


__________________________________________________
1986 K100 RS Motorsport
#### K100 RS Project 
2011 R1200 GS
    

12Back to top Go down   Now A K100LT  Empty Good info Mon Jan 25, 2021 10:28 pm

Porto

Porto
active member
active member
My regular ride the K100 rt without the fairing, sat for a long time before I purchased it. I gues all the trouble came from that. It was bogged over and I found many years later when the paint lifted. All good now, on my second repair and I’m pretty certain I’ve got all the rot fixed.

    

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