BMW K bikes (Bricks)


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1Back to top Go down    New to this magical place on Fri Oct 28, 2016 10:53 am

xASmith88x

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Hey all,

Just joined the forum and I cant stop reading about restores and repairs. I got my first K100 about a year ago and it was a silly mess, fairing all cracked and falling apart so I removed them and am in the process of a Franken'bike.
I purchased the bike to teach myself how to work the engine as i hear its a joy to. It is now ride-able and i commute regularly with it. but I feel like there is always something that needs to be fixed....suspicious hall effect sensor issue or MAF. Poor power, running super rich with sooty black spark plugs.

any tips/advice for working on it would be much appreciated but for now ive been reading my clymer book

Alex

    

2Back to top Go down    Re: New to this magical place on Fri Oct 28, 2016 7:57 pm

Brad-Man

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WelCome to the Knuthaus...


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Toys don't make the man - Man makes the toys....
    

3Back to top Go down    Re: New to this magical place on Sat Oct 29, 2016 10:29 am

Holister

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Hi Alex. WelKome to the forum. Glad to hear you are enjoying the K-Bike. They are a dream in all respects.
Best if you put a post up in the technical/repair section regarding your problem as many don't read the intros.
But to get you started, if all your sooty plugs are the same, then it'll be easy to track down.

  1. Could be the fuel pressure regulator (FPR). Check to see if you are getting a good flow on the return hose. Or, open the tank and listen for the gush as it returns. Little or no return means your FPR needs replacing.
  2. Fuel Injection Control Unit (FICU) could be getting wrong signals from one of the sensors like the Mass Air Flow (MAF) sensor or the temperature sensor, the later being more likely. If the sensor goes 'open circuit' due to corrosion (very common) then the FICU thinks its in start mode and its really very cold and so pump a shit load of fuel in. Pull the plug on the FICU and test Ω between pin #10 and #13. At ambient temp it should be ≈2.5kΩ. There are instructions on the Trouble shooting link off the Portal page.


Cheers


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1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

4Back to top Go down    Re: New to this magical place on Mon Oct 31, 2016 10:48 am

Curley

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cheersWhite K100RS 1991 cheersBlue K75RT 1992 cheersGreen K75RT 1995 cheers
    

5Back to top Go down    Re: New to this magical place on Mon Oct 31, 2016 2:16 pm

88

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Welcome, before you get too deep into HES or MAF issues do the simple stuff like checking the TB rubbers and crank case breather pipe for cracks. Good luck with it.


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88....May contain nuts!

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

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

6Back to top Go down    Re: New to this magical place on Tue Nov 01, 2016 5:58 pm

Born Again Eccentric

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Welcome Alex,

Post up a few details of what your bike was before you started the transformation (model, VIN, year etc.) - it'll help with diagnosis etc.

Nice place McLean VA - lived there for about 2 years (2008 - 2010) and my kids went to Franklin Sherman Elementary School. Happy memories! Unfortunately, I didn't discover K100's until after I returned home to the UK - there is some cracking riding on your doorstep.

Enjoy!


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Paul

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurancewrite-off rebuild Feb 17
"Donor" K100LT 1990 (Red) (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike). June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

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