K11 Owners Group

[Glawseagle]

As posted previously, my K1100LT has developed a serious loss of power and I haven’t clue to what is causing it. TBH, I may just sell the bloody thing.

At around 4,000 revs there is no power. This rev level varies slightly from day to day, but mostly around 4,000 revs in every gear. (It is like running out of petrol). If I open the throttle fully, then the bike splutters and misfires loudly.

If the problem is evident, it can be overcome by gentle opening/closing/massaging the throttle past the problem point. (Up until around 6,000 revs when it dies again).

The bike can go very well for miles with no problems at all, (it really does go very fast), then for no reason the problem will reoccur.

Injector Rail has been taken out and cleaned thoroughly.
Plugs are ok.
Fuel Pump pressure is ok.
There are no air leaks
Throttle bodies have been set up.
The Temp Sensor is ok.
CO value is ok. (I think).
Injector Cleaner has been used twice.
New fuel filter put in.
Fuel lines cleaned.

Higher grade petrol makes no difference
The ambient temp makes no difference.
The level of petrol makes no difference


Has anybody got any ideas?..... please? I am desperate … the bike will have to go otherwise.

HELP!!!!
_________________
"Lovely stuff" ...Not my words Michael... the words of Shakin' Stevens.

[whyoldbill]

I experienced very similar symptoms a while back.
I found that my LT had a ground (earth) cable that had fallen behind my battery and was making intermittent contact with the frame.
Not sure about your bike, but mine had 2 heavy cable to the negative terminal of the battery.

I hope it's as simple as that!!!

Regards,
Bill
_________________
'02 - GL1800


The desired effect is what you get when you improve your interplanetary funksmanship - George Clinton

[Scott_Anderson]

I can't say what the total effect is on the newer motronic, but have you checked your TPS(throttle position sensor).

The older ones(2V bikes) just were(my understanding) 2 switches. 1 at full closed and 1 at a higher open position.

The newer ones(4V bikes) are a full range potentiometer. Maybe yours has a bad spot or dirty connection? It is supposed to provide throttle enrichment at higher trottle position as well as fuel cutoff at closed throttle.
_________________
Ride safe.



1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

[Glawseagle]

[old guy old bike]

I have seen fuel lines delaminate on the inside and develop a little flap that will block or partially block flow. Usually happens around a bend in the line.
Jeff
_________________
1993 K1100LT
2003 K1200GT Gone but not forgotten
2014 Victory Crossraods

[Ernie-NH]

Good afternoon "Glawseagle"...

Scotts suggestion is one of the probable places to look, as well as cleaning up the wiring mess that you described since the Motronic requires a very good connection and ground ( ie: earth ) ... However, read/copy this article by Don Ellenberger from IBMWR site... re the Hall Effect Sensor !!! VERY VERY important that this be in perfect condition and proper adjustment OTHERWISE all kinds of erratic engine performance problems can surface and at any range of engine speeds !

<<<< http://www.ibmwr.org/ktech/intermittent-cutout.shtml >>>

Good luck and keep us all posted on your eventual fix !

Ernie-NH
_________________
AMA,, American Deaf Bikers
Airhead Beemers Club
'11 G650gs
'95 K1100LT
'76 R100/7

[malcolmt]

My 2c worth..

I once had a car with a very similar problem. The HT would track inside the metalic spark plug caps. With the high price of leads we tend to make them last as long as possible. It would be an easy matter to make up a lead and see if affects the problem

Malcolm(t)
_________________
******************************
A Bike on the road is worth two
in the shed
******************************

[Off the grid]

Check your plugs and wires. Make sure your plugs are not loose in the head.
_________________
Bane of your existence since July 2006
2007 Triumph Tiger ABS. "Sabertooth"
2009 Husqvarna TE610. "The dirty Italian mistress"

[Glawseagle]

Thanks for everyones replies ... this is simply the best website ...

So, the journey to work yesterday morning, 23 miles, was dreadful.
The problem was evident at all times and the bike ran like a dog.

Lunchtime, on “Whyoldbill’s” suggestion, I had a quick fumble about with the earth on the battery, and a look at the wiring on the control unit. Couldn’t see any obvious problems.

What I did do though, was to pack out the area below the seat so nothing could move.

The journey home was problem free …… the journey to work this morning was also problem free and the bike was perfect.

So, it may be that I dislodged/moved a significant connection and its now held in place.

That said, I’ve been here before ….. I did 200 miles with no issues last week before the problem reappeared.

Fingers crossed …..
_________________
"Lovely stuff" ...Not my words Michael... the words of Shakin' Stevens.

[whyoldbill]

[SugarHillCTD]

whyoldbill,

That was a real PITA. Once I had found the loose ground- it was difficult to even see it- I had to use a 5mm hex key socket on an 18" extension straight down from behind the fuel tank.

I never found out exactly which connection it was that I had tightened- I think it may have been the ground for the coils (?)

Besides the surging, fuel mileage was right down the crapper- high 20's/gallon.

Good luck,
John
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

[Glawseagle]

[whyoldbill]

[Glawseagle]

[Scott_Anderson]

The case of the motronic does need to have a ground connected.
The unit's front mount sets in rubber and the rear one isn't very secure,(in my opinion).
There is also a male 1/4" tab for a ground wire to connect to from the battery at the rear of the unit.(there is supposed to be one anyway).

You might see if you can find a replacement battery hold down plate so you can have a better mount.
_________________
Ride safe.



1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

[Glawseagle]

[SugarHillCTD]

[robleyd]

[Glawseagle]