BMW K bikes (Bricks)

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1Back to top Go down   Fuel system and old fuel Empty Fuel system and old fuel Wed May 12, 2021 1:15 pm

tedmckey

tedmckey
active member
active member
Hi all -

So, the more I consider your advice plus what I've continued to read, if my bike has sat for ten years do I just plan to replace every last bit of rubbery anything that's had to do with that nasty old fuel? Do I even bother bench testing the fuel pump (which alone costs over $400 from CalMoto BMW) except for my own edification?

    

2Back to top Go down   Fuel system and old fuel Empty Re: Fuel system and old fuel Wed May 12, 2021 1:27 pm

Shep

Shep
Platinum member
Platinum member
Oh heavens do not buy the 400 dollar fuel pump. There are new substitute fuel pumps for around 100 dollars or so. Search this Forum for information on optional quality new fuel pump replacements.
Previous threads should point you in the right direction.
Shep


__________________________________________________
Model        Production Date/Serial Number
K100RS      1984 July/ (F0040448)
K100RS      1986 Dec/ (H0142581)
    

3Back to top Go down   Fuel system and old fuel Empty Re: Fuel system and old fuel Wed May 12, 2021 3:21 pm

brickrider2

brickrider2
Life time member
Life time member
You may wish to consider this: https://www.ebay.com/itm/152571614902
Also, EME in Colorado has very fair prices on the sort of stuff you may need with your project.


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1996 K1100LT
    

4Back to top Go down   Fuel system and old fuel Empty Re: Fuel system and old fuel Wed May 12, 2021 5:09 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I would consider changing the breather tube(z tube) and all fuel lines both in and out of the tank. Cooling system hoses seem to hold up pretty well. I have yet to have a problem with any on 5 bikes so far.

Also change the fuel filter and service the injectors. When you change the fuel line in the tank you want to look at it and make sure it's not full of goo from the fuel pump vibration damper which is some kind of rubber that turns into licorice when old fuel eats it. As long as you have the injectors out, you might want to flush the rail.

There is a good chance that the old fuel has seized the fuel pump. Sometimes you can get it running, but it's probably easier and more reliable to replace it. There is no need to spend a pile of money on an official BMW pump. There are now kits with the pump and mounting parts that sell for about $100. There are threads here that discuss these cheap fuel pumps.


__________________________________________________
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
    

5Back to top Go down   Fuel system and old fuel Empty Re: Fuel system and old fuel Wed May 12, 2021 5:55 pm

MartinW

MartinW
Life time member
Life time member
+1 .75 Make sure the fuel line in the tank is rated as submersible SAE 30 R10. Quantum do a complete or partial fuel pump kit.https://www.bing.com/aclick?
Regards Martin.


__________________________________________________
K75s Hybrid
    

6Back to top Go down   Fuel system and old fuel Empty Re: Fuel system and old fuel Thu May 13, 2021 7:39 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Topics merged. There's no benefit to duplication of a post.


__________________________________________________

1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

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