K11 Owners Group

rigdek · Joined: 05 Jul 2010 Posts: 17

fuel pump on my bike is real noisy hear it most when its low level. i have a gsxr 1000 turbo with uprated subaru fuel pump for 300 hp and the only time i hear it is when it primes when first switched on. are these lts normally noisy?
_________________
1997 lt 1100 se

Allen Nelson · Posted: Wed Jul 07, 2010 7:10 pm Post subject:

THE ANSWER TO YOUR QUESTION IS "YES" THAT IS NORMAL

Now answer my question....300 horse power...holy crapola...how do you keep the thing from flying off the road..... Shocked

_________________
REDBRICK, '96RS (formerly owned), K11OG#5
2011 Triumph Sprint GT
Not a turncoat...and do miss my special K

rigdek · Joined: 05 Jul 2010 Posts: 17

as long as your gentle with the throttle in the lower gears everything is cool. and any spirited driving at all will either spin the back wheel or lift the front in all but top gear. its very smooth if driven sensibly .so much so that i used it todo my advanced motorbike test on Laughing

_________________
1997 lt 1100 se

Stoked Steve · Posted: Wed Jul 07, 2010 9:16 pm Post subject:

Yup, the fuel pump can be rather noisy when the fuel level is low. Keep it from being too low. You'll always hear a "whirrr" when turning the key on, that's a a good thing, if you don't hear the whirr, ...problems are afoot.
_________________
Steve
Virginia Beach, VA
93 K1100RS Mystic Red SOLD
12 Suzuki DL650A VStrom

mtnroads · Posted: Thu Jul 08, 2010 1:24 am Post subject:

There's a rubber holder that it mounts into that can harden with age and increase the noise.
_________________
2012 R1200RT Midnight Blue
95 K1100LT Graphit (sold)
01 R1100RT Black (sold)

kirkkw · Posted: Thu Jul 08, 2010 2:13 am Post subject:

And if a fuel hose is loose in the tank it will be double or triple as noisy.

Old known issue, I have proven that it is true based on personal experience.
_________________
1996 K1100RS, 1976 CB750A, 2017 Triumph Trophy, 2020 R1250RT, 2022 RE Classic 350

frjack · Posted: Thu Jul 08, 2010 5:42 am Post subject: Re: fuel pump noise

Melly Senior · Posted: Tue Sep 07, 2010 7:39 am Post subject: Screeching fuel pump

Hi Chaps; i'm also having noise problems with fuel pump which seems like a loud screeching even with a full tank of fuel (i think it probably sounds worse sat on bike). I tried to fix with draining tank putting fresh fuel and filter in but still have the problem. Any other thoughts and or step by step diognostic checks i could do?

ps. Noise only kicks in after a few miles and the bike is running sweet as anything despite noise.

Cheers Very Happy

Andy
_________________
2005 BMW 1200 RT
1980 MZ TS250 Supa5
Looking for another brick - miss my last one!

Four wheels move the body however two wheels move the soul......

Jim · Posted: Tue Sep 07, 2010 12:04 pm Post subject:

Andy - if it's screeching - and you're sure it's the pump, you might want to start looking for a replacement...
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

Flying Duck · Posted: Tue Sep 07, 2010 2:14 pm Post subject:

Try some fuel system cleaner. Can't hurt.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

Melly Senior · Posted: Wed Sep 08, 2010 9:54 am Post subject:

mtnroads · Posted: Thu Sep 09, 2010 10:02 pm Post subject:

Mine was doing a similar thing when I bought it. Not a screech but a very loud, high-pitched whine that would start up shortly after starting the bike. I took it back to the dealer. They thought it was the pump but that didn't fix it. Eventually they replaced the rubber and plastic mounting assembly in the tank and did some hose re-routing, also in the tank. Now it's like all the others - it only starts to whine when it gets on to reserve. I don't think they did anything else.
_________________
2012 R1200RT Midnight Blue
95 K1100LT Graphit (sold)
01 R1100RT Black (sold)

Melly Senior · Posted: Fri Sep 10, 2010 2:02 am Post subject:

wedge · Posted: Fri Sep 10, 2010 5:40 pm Post subject:

Mine did it after a tank swap so +1 on the "fiddle with hoses and check rubbers"
_________________
Bikes:
93 K75S
93 R1100RS

endoman100 · Posted: Mon Sep 27, 2010 3:34 pm Post subject:

My noise went away after i replaced the fuel filter,but they all will have some noise when the fuel lv is below the fuel pump. good luck
_________________
In the words of the stones
Time Is On My Side
Yes It Is
1993 K1100RS

ljjohns

Still only partially recovered from my trip, but have been looking at the '96 parts bike a little more closely, and specifically at the fuel tank from which the pump and filter were removed. My question is this: is that a possible leak point if the bike sat for a long while (this is a 96 with only 17 K on it)? Took a closer look at the hole at the bottom of the tank where the pump would mount, and it looks like there's a lot of residue; that would match up with the traces of residue below the tank on the motor body.

Just trying to figure out what I've got. apologies if this is a hijack.

Larry Johnson
95 K11LTSE-running
96 K11LTSE-not
_________________
1993 K1100LT (Washington)
1995 K1100LTSE
1996 K1100LTSE (parts)
2003 K1200LTC
1991 K75RT

Flying Duck · Posted: Mon Sep 27, 2010 4:50 pm Post subject:

Yes, that's typically where tank leaks develop.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

ljjohns · Posted: Mon Sep 27, 2010 5:05 pm Post subject:

Thanks, Duck.

Oddly enough, that's good news--I'm trying to figure out why PO2 did what he did, and that fits the pattern I'm seeing.

Larry Johnson
_________________
1993 K1100LT (Washington)
1995 K1100LTSE
1996 K1100LTSE (parts)
2003 K1200LTC
1991 K75RT