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cptss1967
Joined: 04 Apr 2008
Posts: 6
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 Posted: Sun Apr 20, 2008 8:55 pm Post subject: humming noise? |
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I just got off from a short ride (45 min) and went back out to the garage for something and heard a humming, more like a whining noise from the bike. I tried turning the key off and on. The noise would stop and then later start up again. '
The front fork seals have just been replaced so the brakes and ABS were disconnected and reconnected.
Can't figure it out.
New to the Brick but not to BMW
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Rode across Europe in early 70's on an R-50 used Polizei bike. |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Sun Apr 20, 2008 9:45 pm Post subject: |
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Maybe a faulty fuel pump relay? (Wild guess.)
Put your ear to the gas tank - mid way along the left side.
K bikes were referred to by non-K owners as "K whiners" because of the sound the fuel pump makes.
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93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
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IBA #17739 (SS1K, BBG, 50CC)
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bmwmick
Flying Brick Rider
Joined: 07 Jun 2003
Posts: 907
Location: Tucson, AZ
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| Posted: Mon Apr 21, 2008 3:32 pm Post subject: Re: humming noise? |
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| cptss1967 wrote: | I just got off from a short ride (45 min) and went back out to the garage for something and heard a humming, more like a whining noise from the bike. I tried turning the key off and on. The noise would stop and then later start up again. '
The front fork seals have just been replaced so the brakes and ABS were disconnected and reconnected.
Can't figure it out.
New to the Brick but not to BMW |
Sounds like you still have the one-way valve in the fuel tank vent line. It will vent once the pressure is up to about 2psi. Open the fuel cap when you hear this noise, it'll stop. 
Mick
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Mick McKinnon
KOG#175
'93 K1100LT, '96 R1100RT, '84 R100RS, 2010 Kawasaki C-14
Tucson, AZ |
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