BMW K bikes (Bricks)

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1Back to top Go down   There is a hole in my bucket. Empty There is a hole in my bucket. on Thu Mar 19, 2020 10:17 pm

Canadakbike

Canadakbike
active member
active member
Out for a good prance about on my K100.

My buddy on an R3 gave it a rev while waiting for the light to change.

Off we went then I felt the power cut out.... the back on.

Took it to a big parking lot and same thing. Under steady but hard acceleration the engine cuts for a second or 2 then back on. Feels as though the injectors cut to prevent redline but know where near.

Anyone have any thoughts?

    

2Back to top Go down   There is a hole in my bucket. Empty Re: There is a hole in my bucket. on Thu Mar 19, 2020 10:35 pm

RicK G

RicK G
VIP
VIP
Sounds like an air leak between the MAF and manifolds on the head.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

3Back to top Go down   There is a hole in my bucket. Empty Re: There is a hole in my bucket. on Thu Mar 19, 2020 10:37 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Air leak.  Z tube between airbox and crankcase breather?  How old is it?


__________________________________________________
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
    

4Back to top Go down   There is a hole in my bucket. Empty Re: There is a hole in my bucket. on Thu Mar 19, 2020 10:41 pm

duck

duck
Life time member
Life time member
Gas tank connector starting to fail?


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

5Back to top Go down   There is a hole in my bucket. Empty All good suggestions on Thu Mar 19, 2020 10:54 pm

Canadakbike

Canadakbike
active member
active member
I still beat the r3 incidentally.

I like the idea of an air leak as the bike has been running rich.

Don’t know what a Z tube is but, I’ll look at figuring out.

Is there a possibility of the pressure reg. Not performing properly?

When the power cut the rpms drop the power comes on again without further interruption.

    

6Back to top Go down   There is a hole in my bucket. Empty Re: There is a hole in my bucket. on Fri Mar 20, 2020 8:07 am

moriarti

moriarti
Silver member
Silver member
I had a similar fault on mine after months of hair pulling  Crazyfrog id the problem
Ignition Control Unit mounted under the tank/front of frame,replaced with S/H
unit runs perfect.Hope this helps.


__________________________________________________
1984 k100 rs red/black VIN  0004449
    

7Back to top Go down   There is a hole in my bucket. Empty Re: There is a hole in my bucket. on Fri Mar 20, 2020 8:43 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
@moriarti wrote:I had a similar fault on mine after months of hair pulling  Crazyfrog id the problem
Ignition Control Unit mounted under the tank/front of frame,replaced with S/H
unit runs perfect.Hope this helps.
Need PO to state year of his K bike as some RS are 2v. There is no ICU on the 4v engines.

But early K100 gas tank connector is a suspect high on the list.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 102,500 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell Now 36,188  miles
    

8Back to top Go down   There is a hole in my bucket. Empty Re: There is a hole in my bucket. on Fri Mar 20, 2020 9:58 am

Laitch

Laitch
Life time member
Life time member
@92KK 84WW Olaf wrote:Need PO to state year of his K bike as some RS are 2v. There is no ICU on the 4v engines.
It's a 1990 RS.

Click on the Profile tab on the top of this page and enter your moto's model and year in the Signature section, Canadakbike, so members won't need to chase around looking for it.


__________________________________________________
1995 K75 73,000 miles
There is a hole in my bucket. Usa-lo10
    

9Back to top Go down   There is a hole in my bucket. Empty Thanks Laitch on Fri Mar 20, 2020 11:11 am

Canadakbike

Canadakbike
active member
active member
Done, 

thanks for the guidance


__________________________________________________
1990 K100 RS ABS 4valve
    

10Back to top Go down   There is a hole in my bucket. Empty Tank connection on Fri Mar 20, 2020 11:20 am

Canadakbike

Canadakbike
active member
active member
Olaf are you referring to the hose crimp connector at the tank?

The power drop and pick up are immediate. During the power down applying more gas does nothing. When the power comes back on arms rip off.

Replaced plugs this morning. I had new ones for this season. Raining now so will wait till later to test. Going over other suggestion now.


__________________________________________________
1990 K100 RS ABS 4valve
    

11Back to top Go down   There is a hole in my bucket. Empty Re: There is a hole in my bucket. on Fri Mar 20, 2020 11:22 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Check the four pin fuel tank/pump connector.  Major source of power on/off engine issues.


__________________________________________________
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
    

12Back to top Go down   There is a hole in my bucket. Empty Re: There is a hole in my bucket. on Fri Mar 20, 2020 11:39 am

duck

duck
Life time member
Life time member
@92KK 84WW Olaf wrote:But early K100 gas tank connector is a suspect high on the list.

Later ones fail too. I know of a few K1100s where that happened.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

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