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K100-forum.com » Technical, repair and troubleshooting » Electrical » Fuel pump Question

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1Back to top Go down   Fuel pump Question Empty Fuel pump Question Thu Feb 14, 2013 6:06 pm

2slow

2slow
active member
active member
I have a 85 k100 I just bought a 91 k100 when I turn the key on on the 91 I hear the fuel pump run on the 85 when I turn the key on I don't hear it run however it starts and runs fine (alittle harder starting than the 91) question is are they different systems or should I hear the pump on the 85 if so any ideas what might be wrong thanks

    

2Back to top Go down   Fuel pump Question Empty Re: Fuel pump Question Thu Feb 14, 2013 6:19 pm

Ned

Ned
Life time member
Life time member
On my 86K100rs the pump kicks in when the starter button is presses. I know that because I have a fuel pressure gauge between the tank and the fuel rail.
BTW the pressure builds up to 36psi within a second or two.


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I reserve the right to voice my opinions on any subject known to man
Ned

05/1986 (K55) K100RS Motorsport (Europe), Production Code: 0503, 110k km, VIN:0140519 (SOLD)
1976 Honda Goldwing GL1000 (naked)
1997 BMW K1200RS red, VIN: WB10544A1VZA22667
    

3Back to top Go down   Fuel pump Question Empty Re: Fuel pump Question Thu Feb 14, 2013 7:00 pm

Inge K.

Inge K.
VIP
VIP
On a Jetronic euqipped bike (2V) the fuel pump builds up the pressure when you
hit the starter button.

On a Motronic euqipped bike (4V) the fuel pump builds up the pressure when the
ignition is switched on.


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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

4Back to top Go down   Fuel pump Question Empty Re: Fuel pump Question Fri Feb 15, 2013 3:56 am

2slow

2slow
active member
active member
that's what I needed to know thanks

    

5Back to top Go down   Fuel pump Question Empty Re: Fuel pump Question Fri Feb 22, 2013 6:10 pm

Themason

Themason
Gold member
Gold member
They are completely different fuel pumps too, though you can backfit the later pump to the earlier bike and have done so on one of my K100s.


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I live in a parallel universe but have a vacation home in reality :arrow:

1984 K-100RS Alaska Blue w/Parelever and 16V wheels.

1984 K-100RS Metallic Madison stock

1986 R-80G/S w/1000 cc engine

2007 Harley Davidson Street Rod Mirage Orange w/XR1200 wheels, Race Tech, True Track, Works Performance shocks

2007 Harley Davidson Street Rod Vivid Black stock

1993-ish K-100/1100RT/LT hemaphrodite frankenbike thingy to be painted satin black from a rattle can eventually
    

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